include/linux/compat.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_COMPAT_H
   3 #define _LINUX_COMPAT_H
   4 /*
   5  * These are the type definitions for the architecture specific
   6  * syscall compatibility layer.
   7  */
   8
   9 #include <linux/types.h>
  10 #include <linux/time.h>
  11
  12 #include <linux/stat.h>
  13 #include <linux/param.h>        /* for HZ */
  14 #include <linux/sem.h>
  15 #include <linux/socket.h>
  16 #include <linux/if.h>
  17 #include <linux/fs.h>
  18 #include <linux/aio_abi.h>      /* for aio_context_t */
  19 #include <linux/uaccess.h>
  20 #include <linux/unistd.h>
  21
  22 #include <asm/compat.h>
  23
  24 #ifdef CONFIG_COMPAT
  25 #include <asm/siginfo.h>
  26 #include <asm/signal.h>
  27 #endif
  28
  29 #ifdef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
  30 /*
  31  * It may be useful for an architecture to override the definitions of the
  32  * COMPAT_SYSCALL_DEFINE0 and COMPAT_SYSCALL_DEFINEx() macros, in particular
  33  * to use a different calling convention for syscalls. To allow for that,
  34  + the prototypes for the compat_sys_*() functions below will *not* be included
  35  * if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
  36  */
  37 #include <asm/syscall_wrapper.h>
  38 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
  39
  40 #ifndef COMPAT_USE_64BIT_TIME
  41 #define COMPAT_USE_64BIT_TIME 0
  42 #endif
  43
  44 #ifndef __SC_DELOUSE
  45 #define __SC_DELOUSE(t,v) ((__force t)(unsigned long)(v))
  46 #endif
  47
  48 #ifndef COMPAT_SYSCALL_DEFINE0
  49 #define COMPAT_SYSCALL_DEFINE0(name) \
  50         asmlinkage long compat_sys_##name(void); \
  51         ALLOW_ERROR_INJECTION(compat_sys_##name, ERRNO); \
  52         asmlinkage long compat_sys_##name(void)
  53 #endif /* COMPAT_SYSCALL_DEFINE0 */
  54
  55 #define COMPAT_SYSCALL_DEFINE1(name, ...) \
  56         COMPAT_SYSCALL_DEFINEx(1, _##name, __VA_ARGS__)
  57 #define COMPAT_SYSCALL_DEFINE2(name, ...) \
  58         COMPAT_SYSCALL_DEFINEx(2, _##name, __VA_ARGS__)
  59 #define COMPAT_SYSCALL_DEFINE3(name, ...) \
  60         COMPAT_SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
  61 #define COMPAT_SYSCALL_DEFINE4(name, ...) \
  62         COMPAT_SYSCALL_DEFINEx(4, _##name, __VA_ARGS__)
  63 #define COMPAT_SYSCALL_DEFINE5(name, ...) \
  64         COMPAT_SYSCALL_DEFINEx(5, _##name, __VA_ARGS__)
  65 #define COMPAT_SYSCALL_DEFINE6(name, ...) \
  66         COMPAT_SYSCALL_DEFINEx(6, _##name, __VA_ARGS__)
  67
  68 /*
  69  * The asmlinkage stub is aliased to a function named __se_compat_sys_*() which
  70  * sign-extends 32-bit ints to longs whenever needed. The actual work is
  71  * done within __do_compat_sys_*().
  72  */
  73 #ifndef COMPAT_SYSCALL_DEFINEx
  74 #define COMPAT_SYSCALL_DEFINEx(x, name, ...)                                    \
  75         __diag_push();                                                          \
  76         __diag_ignore(GCC, 8, "-Wattribute-alias",                              \
  77                       "Type aliasing is used to sanitize syscall arguments");\
  78         asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));       \
  79         asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))        \
  80                 __attribute__((alias(__stringify(__se_compat_sys##name))));     \
  81         ALLOW_ERROR_INJECTION(compat_sys##name, ERRNO);                         \
  82         static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__));\
  83         asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__));  \
  84         asmlinkage long __se_compat_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__))   \
  85         {                                                                       \
  86                 long ret = __do_compat_sys##name(__MAP(x,__SC_DELOUSE,__VA_ARGS__));\
  87                 __MAP(x,__SC_TEST,__VA_ARGS__);                                 \
  88                 return ret;                                                     \
  89         }                                                                       \
  90         __diag_pop();                                                           \
  91         static inline long __do_compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__))
  92 #endif /* COMPAT_SYSCALL_DEFINEx */
  93
  94 #ifdef CONFIG_COMPAT
  95
  96 #ifndef compat_user_stack_pointer
  97 #define compat_user_stack_pointer() current_user_stack_pointer()
  98 #endif
  99 #ifndef compat_sigaltstack      /* we'll need that for MIPS */
 100 typedef struct compat_sigaltstack {
 101         compat_uptr_t                   ss_sp;
 102         int                             ss_flags;
 103         compat_size_t                   ss_size;
 104 } compat_stack_t;
 105 #endif
 106 #ifndef COMPAT_MINSIGSTKSZ
 107 #define COMPAT_MINSIGSTKSZ      MINSIGSTKSZ
 108 #endif
 109
 110 #define compat_jiffies_to_clock_t(x)    \
 111                 (((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
 112
 113 typedef __compat_uid32_t        compat_uid_t;
 114 typedef __compat_gid32_t        compat_gid_t;
 115
 116 struct compat_sel_arg_struct;
 117 struct rusage;
 118
 119 struct compat_itimerval {
 120         struct old_timeval32    it_interval;
 121         struct old_timeval32    it_value;
 122 };
 123
 124 struct itimerval;
 125 int get_compat_itimerval(struct itimerval *, const struct compat_itimerval __user *);
 126 int put_compat_itimerval(struct compat_itimerval __user *, const struct itimerval *);
 127
 128 struct compat_tms {
 129         compat_clock_t          tms_utime;
 130         compat_clock_t          tms_stime;
 131         compat_clock_t          tms_cutime;
 132         compat_clock_t          tms_cstime;
 133 };
 134
 135 struct compat_timex {
 136         compat_uint_t modes;
 137         compat_long_t offset;
 138         compat_long_t freq;
 139         compat_long_t maxerror;
 140         compat_long_t esterror;
 141         compat_int_t status;
 142         compat_long_t constant;
 143         compat_long_t precision;
 144         compat_long_t tolerance;
 145         struct old_timeval32 time;
 146         compat_long_t tick;
 147         compat_long_t ppsfreq;
 148         compat_long_t jitter;
 149         compat_int_t shift;
 150         compat_long_t stabil;
 151         compat_long_t jitcnt;
 152         compat_long_t calcnt;
 153         compat_long_t errcnt;
 154         compat_long_t stbcnt;
 155         compat_int_t tai;
 156
 157         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 158         compat_int_t:32; compat_int_t:32; compat_int_t:32; compat_int_t:32;
 159         compat_int_t:32; compat_int_t:32; compat_int_t:32;
 160 };
 161
 162 struct timex;
 163 int compat_get_timex(struct timex *, const struct compat_timex __user *);
 164 int compat_put_timex(struct compat_timex __user *, const struct timex *);
 165
 166 #define _COMPAT_NSIG_WORDS      (_COMPAT_NSIG / _COMPAT_NSIG_BPW)
 167
 168 typedef struct {
 169         compat_sigset_word      sig[_COMPAT_NSIG_WORDS];
 170 } compat_sigset_t;
 171
 172 struct compat_sigaction {
 173 #ifndef __ARCH_HAS_IRIX_SIGACTION
 174         compat_uptr_t                   sa_handler;
 175         compat_ulong_t                  sa_flags;
 176 #else
 177         compat_uint_t                   sa_flags;
 178         compat_uptr_t                   sa_handler;
 179 #endif
 180 #ifdef __ARCH_HAS_SA_RESTORER
 181         compat_uptr_t                   sa_restorer;
 182 #endif
 183         compat_sigset_t                 sa_mask __packed;
 184 };
 185
 186 typedef union compat_sigval {
 187         compat_int_t    sival_int;
 188         compat_uptr_t   sival_ptr;
 189 } compat_sigval_t;
 190
 191 typedef struct compat_siginfo {
 192         int si_signo;
 193 #ifndef __ARCH_HAS_SWAPPED_SIGINFO
 194         int si_errno;
 195         int si_code;
 196 #else
 197         int si_code;
 198         int si_errno;
 199 #endif
 200
 201         union {
 202                 int _pad[128/sizeof(int) - 3];
 203
 204                 /* kill() */
 205                 struct {
 206                         compat_pid_t _pid;      /* sender's pid */
 207                         __compat_uid32_t _uid;  /* sender's uid */
 208                 } _kill;
 209
 210                 /* POSIX.1b timers */
 211                 struct {
 212                         compat_timer_t _tid;    /* timer id */
 213                         int _overrun;           /* overrun count */
 214                         compat_sigval_t _sigval;        /* same as below */
 215                 } _timer;
 216
 217                 /* POSIX.1b signals */
 218                 struct {
 219                         compat_pid_t _pid;      /* sender's pid */
 220                         __compat_uid32_t _uid;  /* sender's uid */
 221                         compat_sigval_t _sigval;
 222                 } _rt;
 223
 224                 /* SIGCHLD */
 225                 struct {
 226                         compat_pid_t _pid;      /* which child */
 227                         __compat_uid32_t _uid;  /* sender's uid */
 228                         int _status;            /* exit code */
 229                         compat_clock_t _utime;
 230                         compat_clock_t _stime;
 231                 } _sigchld;
 232
 233 #ifdef CONFIG_X86_X32_ABI
 234                 /* SIGCHLD (x32 version) */
 235                 struct {
 236                         compat_pid_t _pid;      /* which child */
 237                         __compat_uid32_t _uid;  /* sender's uid */
 238                         int _status;            /* exit code */
 239                         compat_s64 _utime;
 240                         compat_s64 _stime;
 241                 } _sigchld_x32;
 242 #endif
 243
 244                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGTRAP, SIGEMT */
 245                 struct {
 246                         compat_uptr_t _addr;    /* faulting insn/memory ref. */
 247 #ifdef __ARCH_SI_TRAPNO
 248                         int _trapno;    /* TRAP # which caused the signal */
 249 #endif
 250 #define __COMPAT_ADDR_BND_PKEY_PAD  (__alignof__(compat_uptr_t) < sizeof(short) ? \
 251                                      sizeof(short) : __alignof__(compat_uptr_t))
 252                         union {
 253                                 /*
 254                                  * used when si_code=BUS_MCEERR_AR or
 255                                  * used when si_code=BUS_MCEERR_AO
 256                                  */
 257                                 short int _addr_lsb;    /* Valid LSB of the reported address. */
 258                                 /* used when si_code=SEGV_BNDERR */
 259                                 struct {
 260                                         char _dummy_bnd[__COMPAT_ADDR_BND_PKEY_PAD];
 261                                         compat_uptr_t _lower;
 262                                         compat_uptr_t _upper;
 263                                 } _addr_bnd;
 264                                 /* used when si_code=SEGV_PKUERR */
 265                                 struct {
 266                                         char _dummy_pkey[__COMPAT_ADDR_BND_PKEY_PAD];
 267                                         u32 _pkey;
 268                                 } _addr_pkey;
 269                         };
 270                 } _sigfault;
 271
 272                 /* SIGPOLL */
 273                 struct {
 274                         compat_long_t _band;    /* POLL_IN, POLL_OUT, POLL_MSG */
 275                         int _fd;
 276                 } _sigpoll;
 277
 278                 struct {
 279                         compat_uptr_t _call_addr; /* calling user insn */
 280                         int _syscall;   /* triggering system call number */
 281                         unsigned int _arch;     /* AUDIT_ARCH_* of syscall */
 282                 } _sigsys;
 283         } _sifields;
 284 } compat_siginfo_t;
 285
 286 /*
 287  * These functions operate on 32- or 64-bit specs depending on
 288  * COMPAT_USE_64BIT_TIME, hence the void user pointer arguments.
 289  */
 290 extern int compat_get_timespec(struct timespec *, const void __user *);
 291 extern int compat_put_timespec(const struct timespec *, void __user *);
 292 extern int compat_get_timeval(struct timeval *, const void __user *);
 293 extern int compat_put_timeval(const struct timeval *, void __user *);
 294
 295 struct compat_iovec {
 296         compat_uptr_t   iov_base;
 297         compat_size_t   iov_len;
 298 };
 299
 300 struct compat_rlimit {
 301         compat_ulong_t  rlim_cur;
 302         compat_ulong_t  rlim_max;
 303 };
 304
 305 struct compat_rusage {
 306         struct old_timeval32 ru_utime;
 307         struct old_timeval32 ru_stime;
 308         compat_long_t   ru_maxrss;
 309         compat_long_t   ru_ixrss;
 310         compat_long_t   ru_idrss;
 311         compat_long_t   ru_isrss;
 312         compat_long_t   ru_minflt;
 313         compat_long_t   ru_majflt;
 314         compat_long_t   ru_nswap;
 315         compat_long_t   ru_inblock;
 316         compat_long_t   ru_oublock;
 317         compat_long_t   ru_msgsnd;
 318         compat_long_t   ru_msgrcv;
 319         compat_long_t   ru_nsignals;
 320         compat_long_t   ru_nvcsw;
 321         compat_long_t   ru_nivcsw;
 322 };
 323
 324 extern int put_compat_rusage(const struct rusage *,
 325                              struct compat_rusage __user *);
 326
 327 struct compat_siginfo;
 328 struct __compat_aio_sigset;
 329
 330 struct compat_dirent {
 331         u32             d_ino;
 332         compat_off_t    d_off;
 333         u16             d_reclen;
 334         char            d_name[256];
 335 };
 336
 337 struct compat_ustat {
 338         compat_daddr_t          f_tfree;
 339         compat_ino_t            f_tinode;
 340         char                    f_fname[6];
 341         char                    f_fpack[6];
 342 };
 343
 344 #define COMPAT_SIGEV_PAD_SIZE   ((SIGEV_MAX_SIZE/sizeof(int)) - 3)
 345
 346 typedef struct compat_sigevent {
 347         compat_sigval_t sigev_value;
 348         compat_int_t sigev_signo;
 349         compat_int_t sigev_notify;
 350         union {
 351                 compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
 352                 compat_int_t _tid;
 353
 354                 struct {
 355                         compat_uptr_t _function;
 356                         compat_uptr_t _attribute;
 357                 } _sigev_thread;
 358         } _sigev_un;
 359 } compat_sigevent_t;
 360
 361 struct compat_ifmap {
 362         compat_ulong_t mem_start;
 363         compat_ulong_t mem_end;
 364         unsigned short base_addr;
 365         unsigned char irq;
 366         unsigned char dma;
 367         unsigned char port;
 368 };
 369
 370 struct compat_if_settings {
 371         unsigned int type;      /* Type of physical device or protocol */
 372         unsigned int size;      /* Size of the data allocated by the caller */
 373         compat_uptr_t ifs_ifsu; /* union of pointers */
 374 };
 375
 376 struct compat_ifreq {
 377         union {
 378                 char    ifrn_name[IFNAMSIZ];    /* if name, e.g. "en0" */
 379         } ifr_ifrn;
 380         union {
 381                 struct  sockaddr ifru_addr;
 382                 struct  sockaddr ifru_dstaddr;
 383                 struct  sockaddr ifru_broadaddr;
 384                 struct  sockaddr ifru_netmask;
 385                 struct  sockaddr ifru_hwaddr;
 386                 short   ifru_flags;
 387                 compat_int_t    ifru_ivalue;
 388                 compat_int_t    ifru_mtu;
 389                 struct  compat_ifmap ifru_map;
 390                 char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
 391                 char    ifru_newname[IFNAMSIZ];
 392                 compat_caddr_t  ifru_data;
 393                 struct  compat_if_settings ifru_settings;
 394         } ifr_ifru;
 395 };
 396
 397 struct compat_ifconf {
 398         compat_int_t    ifc_len;                /* size of buffer */
 399         compat_caddr_t  ifcbuf;
 400 };
 401
 402 struct compat_robust_list {
 403         compat_uptr_t                   next;
 404 };
 405
 406 struct compat_robust_list_head {
 407         struct compat_robust_list       list;
 408         compat_long_t                   futex_offset;
 409         compat_uptr_t                   list_op_pending;
 410 };
 411
 412 #ifdef CONFIG_COMPAT_OLD_SIGACTION
 413 struct compat_old_sigaction {
 414         compat_uptr_t                   sa_handler;
 415         compat_old_sigset_t             sa_mask;
 416         compat_ulong_t                  sa_flags;
 417         compat_uptr_t                   sa_restorer;
 418 };
 419 #endif
 420
 421 struct compat_keyctl_kdf_params {
 422         compat_uptr_t hashname;
 423         compat_uptr_t otherinfo;
 424         __u32 otherinfolen;
 425         __u32 __spare[8];
 426 };
 427
 428 struct compat_statfs;
 429 struct compat_statfs64;
 430 struct compat_old_linux_dirent;
 431 struct compat_linux_dirent;
 432 struct linux_dirent64;
 433 struct compat_msghdr;
 434 struct compat_mmsghdr;
 435 struct compat_sysinfo;
 436 struct compat_sysctl_args;
 437 struct compat_kexec_segment;
 438 struct compat_mq_attr;
 439 struct compat_msgbuf;
 440
 441 extern void compat_exit_robust_list(struct task_struct *curr);
 442
 443 #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
 444
 445 #define BITS_TO_COMPAT_LONGS(bits) DIV_ROUND_UP(bits, BITS_PER_COMPAT_LONG)
 446
 447 long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
 448                        unsigned long bitmap_size);
 449 long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
 450                        unsigned long bitmap_size);
 451 int copy_siginfo_from_user32(kernel_siginfo_t *to, const struct compat_siginfo __user *from);
 452 int copy_siginfo_to_user32(struct compat_siginfo __user *to, const kernel_siginfo_t *from);
 453 int get_compat_sigevent(struct sigevent *event,
 454                 const struct compat_sigevent __user *u_event);
 455
 456 static inline int old_timeval32_compare(struct old_timeval32 *lhs,
 457                                         struct old_timeval32 *rhs)
 458 {
 459         if (lhs->tv_sec < rhs->tv_sec)
 460                 return -1;
 461         if (lhs->tv_sec > rhs->tv_sec)
 462                 return 1;
 463         return lhs->tv_usec - rhs->tv_usec;
 464 }
 465
 466 static inline int old_timespec32_compare(struct old_timespec32 *lhs,
 467                                         struct old_timespec32 *rhs)
 468 {
 469         if (lhs->tv_sec < rhs->tv_sec)
 470                 return -1;
 471         if (lhs->tv_sec > rhs->tv_sec)
 472                 return 1;
 473         return lhs->tv_nsec - rhs->tv_nsec;
 474 }
 475
 476 extern int get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat);
 477
 478 /*
 479  * Defined inline such that size can be compile time constant, which avoids
 480  * CONFIG_HARDENED_USERCOPY complaining about copies from task_struct
 481  */
 482 static inline int
 483 put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
 484                   unsigned int size)
 485 {
 486         /* size <= sizeof(compat_sigset_t) <= sizeof(sigset_t) */
 487 #ifdef __BIG_ENDIAN
 488         compat_sigset_t v;
 489         switch (_NSIG_WORDS) {
 490         case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
 491                 /* fall through */
 492         case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
 493                 /* fall through */
 494         case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
 495                 /* fall through */
 496         case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
 497         }
 498         return copy_to_user(compat, &v, size) ? -EFAULT : 0;
 499 #else
 500         return copy_to_user(compat, set, size) ? -EFAULT : 0;
 501 #endif
 502 }
 503
 504 extern int compat_ptrace_request(struct task_struct *child,
 505                                  compat_long_t request,
 506                                  compat_ulong_t addr, compat_ulong_t data);
 507
 508 extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
 509                                compat_ulong_t addr, compat_ulong_t data);
 510
 511 struct epoll_event;     /* fortunately, this one is fixed-layout */
 512
 513 extern ssize_t compat_rw_copy_check_uvector(int type,
 514                 const struct compat_iovec __user *uvector,
 515                 unsigned long nr_segs,
 516                 unsigned long fast_segs, struct iovec *fast_pointer,
 517                 struct iovec **ret_pointer);
 518
 519 extern void __user *compat_alloc_user_space(unsigned long len);
 520
 521 int compat_restore_altstack(const compat_stack_t __user *uss);
 522 int __compat_save_altstack(compat_stack_t __user *, unsigned long);
 523 #define compat_save_altstack_ex(uss, sp) do { \
 524         compat_stack_t __user *__uss = uss; \
 525         struct task_struct *t = current; \
 526         put_user_ex(ptr_to_compat((void __user *)t->sas_ss_sp), &__uss->ss_sp); \
 527         put_user_ex(t->sas_ss_flags, &__uss->ss_flags); \
 528         put_user_ex(t->sas_ss_size, &__uss->ss_size); \
 529         if (t->sas_ss_flags & SS_AUTODISARM) \
 530                 sas_ss_reset(t); \
 531 } while (0);
 532
 533 /*
 534  * These syscall function prototypes are kept in the same order as
 535  * include/uapi/asm-generic/unistd.h. Deprecated or obsolete system calls
 536  * go below.
 537  *
 538  * Please note that these prototypes here are only provided for information
 539  * purposes, for static analysis, and for linking from the syscall table.
 540  * These functions should not be called elsewhere from kernel code.
 541  *
 542  * As the syscall calling convention may be different from the default
 543  * for architectures overriding the syscall calling convention, do not
 544  * include the prototypes if CONFIG_ARCH_HAS_SYSCALL_WRAPPER is enabled.
 545  */
 546 #ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER
 547 asmlinkage long compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p);
 548 asmlinkage long compat_sys_io_submit(compat_aio_context_t ctx_id, int nr,
 549                                      u32 __user *iocb);
 550 asmlinkage long compat_sys_io_getevents(compat_aio_context_t ctx_id,
 551                                         compat_long_t min_nr,
 552                                         compat_long_t nr,
 553                                         struct io_event __user *events,
 554                                         struct old_timespec32 __user *timeout);
 555 asmlinkage long compat_sys_io_pgetevents(compat_aio_context_t ctx_id,
 556                                         compat_long_t min_nr,
 557                                         compat_long_t nr,
 558                                         struct io_event __user *events,
 559                                         struct old_timespec32 __user *timeout,
 560                                         const struct __compat_aio_sigset __user *usig);
 561
 562 /* fs/cookies.c */
 563 asmlinkage long compat_sys_lookup_dcookie(u32, u32, char __user *, compat_size_t);
 564
 565 /* fs/eventpoll.c */
 566 asmlinkage long compat_sys_epoll_pwait(int epfd,
 567                         struct epoll_event __user *events,
 568                         int maxevents, int timeout,
 569                         const compat_sigset_t __user *sigmask,
 570                         compat_size_t sigsetsize);
 571
 572 /* fs/fcntl.c */
 573 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
 574                                  compat_ulong_t arg);
 575 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
 576                                    compat_ulong_t arg);
 577
 578 /* fs/ioctl.c */
 579 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
 580                                  compat_ulong_t arg);
 581
 582 /* fs/namespace.c */
 583 asmlinkage long compat_sys_mount(const char __user *dev_name,
 584                                  const char __user *dir_name,
 585                                  const char __user *type, compat_ulong_t flags,
 586                                  const void __user *data);
 587
 588 /* fs/open.c */
 589 asmlinkage long compat_sys_statfs(const char __user *pathname,
 590                                   struct compat_statfs __user *buf);
 591 asmlinkage long compat_sys_statfs64(const char __user *pathname,
 592                                     compat_size_t sz,
 593                                     struct compat_statfs64 __user *buf);
 594 asmlinkage long compat_sys_fstatfs(unsigned int fd,
 595                                    struct compat_statfs __user *buf);
 596 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
 597                                      struct compat_statfs64 __user *buf);
 598 asmlinkage long compat_sys_truncate(const char __user *, compat_off_t);
 599 asmlinkage long compat_sys_ftruncate(unsigned int, compat_ulong_t);
 600 /* No generic prototype for truncate64, ftruncate64, fallocate */
 601 asmlinkage long compat_sys_openat(int dfd, const char __user *filename,
 602                                   int flags, umode_t mode);
 603
 604 /* fs/readdir.c */
 605 asmlinkage long compat_sys_getdents(unsigned int fd,
 606                                     struct compat_linux_dirent __user *dirent,
 607                                     unsigned int count);
 608
 609 /* fs/read_write.c */
 610 asmlinkage long compat_sys_lseek(unsigned int, compat_off_t, unsigned int);
 611 asmlinkage ssize_t compat_sys_readv(compat_ulong_t fd,
 612                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
 613 asmlinkage ssize_t compat_sys_writev(compat_ulong_t fd,
 614                 const struct compat_iovec __user *vec, compat_ulong_t vlen);
 615 /* No generic prototype for pread64 and pwrite64 */
 616 asmlinkage ssize_t compat_sys_preadv(compat_ulong_t fd,
 617                 const struct compat_iovec __user *vec,
 618                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
 619 asmlinkage ssize_t compat_sys_pwritev(compat_ulong_t fd,
 620                 const struct compat_iovec __user *vec,
 621                 compat_ulong_t vlen, u32 pos_low, u32 pos_high);
 622 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64
 623 asmlinkage long compat_sys_preadv64(unsigned long fd,
 624                 const struct compat_iovec __user *vec,
 625                 unsigned long vlen, loff_t pos);
 626 #endif
 627
 628 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64
 629 asmlinkage long compat_sys_pwritev64(unsigned long fd,
 630                 const struct compat_iovec __user *vec,
 631                 unsigned long vlen, loff_t pos);
 632 #endif
 633
 634 /* fs/sendfile.c */
 635 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
 636                                     compat_off_t __user *offset, compat_size_t count);
 637 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
 638                                     compat_loff_t __user *offset, compat_size_t count);
 639
 640 /* fs/select.c */
 641 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
 642                                     compat_ulong_t __user *outp,
 643                                     compat_ulong_t __user *exp,
 644                                     struct old_timespec32 __user *tsp,
 645                                     void __user *sig);
 646 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
 647                                  unsigned int nfds,
 648                                  struct old_timespec32 __user *tsp,
 649                                  const compat_sigset_t __user *sigmask,
 650                                  compat_size_t sigsetsize);
 651
 652 /* fs/signalfd.c */
 653 asmlinkage long compat_sys_signalfd4(int ufd,
 654                                      const compat_sigset_t __user *sigmask,
 655                                      compat_size_t sigsetsize, int flags);
 656
 657 /* fs/splice.c */
 658 asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *,
 659                                     unsigned int nr_segs, unsigned int flags);
 660
 661 /* fs/stat.c */
 662 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
 663                                       const char __user *filename,
 664                                       struct compat_stat __user *statbuf,
 665                                       int flag);
 666 asmlinkage long compat_sys_newfstat(unsigned int fd,
 667                                     struct compat_stat __user *statbuf);
 668
 669 /* fs/sync.c: No generic prototype for sync_file_range and sync_file_range2 */
 670
 671 /* fs/timerfd.c */
 672 asmlinkage long compat_sys_timerfd_gettime(int ufd,
 673                                    struct old_itimerspec32 __user *otmr);
 674 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
 675                                    const struct old_itimerspec32 __user *utmr,
 676                                    struct old_itimerspec32 __user *otmr);
 677
 678 /* fs/utimes.c */
 679 asmlinkage long compat_sys_utimensat(unsigned int dfd,
 680                                      const char __user *filename,
 681                                      struct old_timespec32 __user *t,
 682                                      int flags);
 683
 684 /* kernel/exit.c */
 685 asmlinkage long compat_sys_waitid(int, compat_pid_t,
 686                 struct compat_siginfo __user *, int,
 687                 struct compat_rusage __user *);
 688
 689
 690
 691 /* kernel/futex.c */
 692 asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
 693                 struct old_timespec32 __user *utime, u32 __user *uaddr2,
 694                 u32 val3);
 695 asmlinkage long
 696 compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
 697                            compat_size_t len);
 698 asmlinkage long
 699 compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
 700                            compat_size_t __user *len_ptr);
 701
 702 /* kernel/hrtimer.c */
 703 asmlinkage long compat_sys_nanosleep(struct old_timespec32 __user *rqtp,
 704                                      struct old_timespec32 __user *rmtp);
 705
 706 /* kernel/itimer.c */
 707 asmlinkage long compat_sys_getitimer(int which,
 708                                      struct compat_itimerval __user *it);
 709 asmlinkage long compat_sys_setitimer(int which,
 710                                      struct compat_itimerval __user *in,
 711                                      struct compat_itimerval __user *out);
 712
 713 /* kernel/kexec.c */
 714 asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
 715                                       compat_ulong_t nr_segments,
 716                                       struct compat_kexec_segment __user *,
 717                                       compat_ulong_t flags);
 718
 719 /* kernel/posix-timers.c */
 720 asmlinkage long compat_sys_timer_create(clockid_t which_clock,
 721                         struct compat_sigevent __user *timer_event_spec,
 722                         timer_t __user *created_timer_id);
 723 asmlinkage long compat_sys_timer_gettime(timer_t timer_id,
 724                                  struct old_itimerspec32 __user *setting);
 725 asmlinkage long compat_sys_timer_settime(timer_t timer_id, int flags,
 726                                          struct old_itimerspec32 __user *new,
 727                                          struct old_itimerspec32 __user *old);
 728 asmlinkage long compat_sys_clock_settime(clockid_t which_clock,
 729                                          struct old_timespec32 __user *tp);
 730 asmlinkage long compat_sys_clock_gettime(clockid_t which_clock,
 731                                          struct old_timespec32 __user *tp);
 732 asmlinkage long compat_sys_clock_getres(clockid_t which_clock,
 733                                         struct old_timespec32 __user *tp);
 734 asmlinkage long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
 735                                            struct old_timespec32 __user *rqtp,
 736                                            struct old_timespec32 __user *rmtp);
 737
 738 /* kernel/ptrace.c */
 739 asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
 740                                   compat_long_t addr, compat_long_t data);
 741
 742 /* kernel/sched/core.c */
 743 asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
 744                                      unsigned int len,
 745                                      compat_ulong_t __user *user_mask_ptr);
 746 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid,
 747                                      unsigned int len,
 748                                      compat_ulong_t __user *user_mask_ptr);
 749 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid,
 750                                                  struct old_timespec32 __user *interval);
 751
 752 /* kernel/signal.c */
 753 asmlinkage long compat_sys_sigaltstack(const compat_stack_t __user *uss_ptr,
 754                                        compat_stack_t __user *uoss_ptr);
 755 asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset,
 756                                          compat_size_t sigsetsize);
 757 #ifndef CONFIG_ODD_RT_SIGACTION
 758 asmlinkage long compat_sys_rt_sigaction(int,
 759                                  const struct compat_sigaction __user *,
 760                                  struct compat_sigaction __user *,
 761                                  compat_size_t);
 762 #endif
 763 asmlinkage long compat_sys_rt_sigprocmask(int how, compat_sigset_t __user *set,
 764                                           compat_sigset_t __user *oset,
 765                                           compat_size_t sigsetsize);
 766 asmlinkage long compat_sys_rt_sigpending(compat_sigset_t __user *uset,
 767                                          compat_size_t sigsetsize);
 768 asmlinkage long compat_sys_rt_sigtimedwait(compat_sigset_t __user *uthese,
 769                 struct compat_siginfo __user *uinfo,
 770                 struct old_timespec32 __user *uts, compat_size_t sigsetsize);
 771 asmlinkage long compat_sys_rt_sigqueueinfo(compat_pid_t pid, int sig,
 772                                 struct compat_siginfo __user *uinfo);
 773 /* No generic prototype for rt_sigreturn */
 774
 775 /* kernel/sys.c */
 776 asmlinkage long compat_sys_times(struct compat_tms __user *tbuf);
 777 asmlinkage long compat_sys_getrlimit(unsigned int resource,
 778                                      struct compat_rlimit __user *rlim);
 779 asmlinkage long compat_sys_setrlimit(unsigned int resource,
 780                                      struct compat_rlimit __user *rlim);
 781 asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru);
 782
 783 /* kernel/time.c */
 784 asmlinkage long compat_sys_gettimeofday(struct old_timeval32 __user *tv,
 785                 struct timezone __user *tz);
 786 asmlinkage long compat_sys_settimeofday(struct old_timeval32 __user *tv,
 787                 struct timezone __user *tz);
 788 asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
 789
 790 /* kernel/timer.c */
 791 asmlinkage long compat_sys_sysinfo(struct compat_sysinfo __user *info);
 792
 793 /* ipc/mqueue.c */
 794 asmlinkage long compat_sys_mq_open(const char __user *u_name,
 795                         int oflag, compat_mode_t mode,
 796                         struct compat_mq_attr __user *u_attr);
 797 asmlinkage long compat_sys_mq_timedsend(mqd_t mqdes,
 798                         const char __user *u_msg_ptr,
 799                         compat_size_t msg_len, unsigned int msg_prio,
 800                         const struct old_timespec32 __user *u_abs_timeout);
 801 asmlinkage ssize_t compat_sys_mq_timedreceive(mqd_t mqdes,
 802                         char __user *u_msg_ptr,
 803                         compat_size_t msg_len, unsigned int __user *u_msg_prio,
 804                         const struct old_timespec32 __user *u_abs_timeout);
 805 asmlinkage long compat_sys_mq_notify(mqd_t mqdes,
 806                         const struct compat_sigevent __user *u_notification);
 807 asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
 808                         const struct compat_mq_attr __user *u_mqstat,
 809                         struct compat_mq_attr __user *u_omqstat);
 810
 811 /* ipc/msg.c */
 812 asmlinkage long compat_sys_msgctl(int first, int second, void __user *uptr);
 813 asmlinkage long compat_sys_msgrcv(int msqid, compat_uptr_t msgp,
 814                 compat_ssize_t msgsz, compat_long_t msgtyp, int msgflg);
 815 asmlinkage long compat_sys_msgsnd(int msqid, compat_uptr_t msgp,
 816                 compat_ssize_t msgsz, int msgflg);
 817
 818 /* ipc/sem.c */
 819 asmlinkage long compat_sys_semctl(int semid, int semnum, int cmd, int arg);
 820 asmlinkage long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
 821                 unsigned nsems, const struct old_timespec32 __user *timeout);
 822
 823 /* ipc/shm.c */
 824 asmlinkage long compat_sys_shmctl(int first, int second, void __user *uptr);
 825 asmlinkage long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg);
 826
 827 /* net/socket.c */
 828 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, compat_size_t len,
 829                             unsigned flags, struct sockaddr __user *addr,
 830                             int __user *addrlen);
 831 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
 832                                       char __user *optval, unsigned int optlen);
 833 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
 834                                       char __user *optval, int __user *optlen);
 835 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg,
 836                                    unsigned flags);
 837 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg,
 838                                    unsigned int flags);
 839
 840 /* mm/filemap.c: No generic prototype for readahead */
 841
 842 /* security/keys/keyctl.c */
 843 asmlinkage long compat_sys_keyctl(u32 option,
 844                               u32 arg2, u32 arg3, u32 arg4, u32 arg5);
 845
 846 /* arch/example/kernel/sys_example.c */
 847 asmlinkage long compat_sys_execve(const char __user *filename, const compat_uptr_t __user *argv,
 848                      const compat_uptr_t __user *envp);
 849
 850 /* mm/fadvise.c: No generic prototype for fadvise64_64 */
 851
 852 /* mm/, CONFIG_MMU only */
 853 asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len,
 854                                  compat_ulong_t mode,
 855                                  compat_ulong_t __user *nmask,
 856                                  compat_ulong_t maxnode, compat_ulong_t flags);
 857 asmlinkage long compat_sys_get_mempolicy(int __user *policy,
 858                                          compat_ulong_t __user *nmask,
 859                                          compat_ulong_t maxnode,
 860                                          compat_ulong_t addr,
 861                                          compat_ulong_t flags);
 862 asmlinkage long compat_sys_set_mempolicy(int mode, compat_ulong_t __user *nmask,
 863                                          compat_ulong_t maxnode);
 864 asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
 865                 compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
 866                 const compat_ulong_t __user *new_nodes);
 867 asmlinkage long compat_sys_move_pages(pid_t pid, compat_ulong_t nr_pages,
 868                                       __u32 __user *pages,
 869                                       const int __user *nodes,
 870                                       int __user *status,
 871                                       int flags);
 872
 873 asmlinkage long compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid,
 874                                         compat_pid_t pid, int sig,
 875                                         struct compat_siginfo __user *uinfo);
 876 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 877                                     unsigned vlen, unsigned int flags,
 878                                     struct old_timespec32 __user *timeout);
 879 asmlinkage long compat_sys_wait4(compat_pid_t pid,
 880                                  compat_uint_t __user *stat_addr, int options,
 881                                  struct compat_rusage __user *ru);
 882 asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32,
 883                                             int, const char __user *);
 884 asmlinkage long compat_sys_open_by_handle_at(int mountdirfd,
 885                                              struct file_handle __user *handle,
 886                                              int flags);
 887 asmlinkage long compat_sys_clock_adjtime(clockid_t which_clock,
 888                                          struct compat_timex __user *tp);
 889 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
 890                                     unsigned vlen, unsigned int flags);
 891 asmlinkage ssize_t compat_sys_process_vm_readv(compat_pid_t pid,
 892                 const struct compat_iovec __user *lvec,
 893                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
 894                 compat_ulong_t riovcnt, compat_ulong_t flags);
 895 asmlinkage ssize_t compat_sys_process_vm_writev(compat_pid_t pid,
 896                 const struct compat_iovec __user *lvec,
 897                 compat_ulong_t liovcnt, const struct compat_iovec __user *rvec,
 898                 compat_ulong_t riovcnt, compat_ulong_t flags);
 899 asmlinkage long compat_sys_execveat(int dfd, const char __user *filename,
 900                      const compat_uptr_t __user *argv,
 901                      const compat_uptr_t __user *envp, int flags);
 902 asmlinkage ssize_t compat_sys_preadv2(compat_ulong_t fd,
 903                 const struct compat_iovec __user *vec,
 904                 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
 905 asmlinkage ssize_t compat_sys_pwritev2(compat_ulong_t fd,
 906                 const struct compat_iovec __user *vec,
 907                 compat_ulong_t vlen, u32 pos_low, u32 pos_high, rwf_t flags);
 908 #ifdef __ARCH_WANT_COMPAT_SYS_PREADV64V2
 909 asmlinkage long  compat_sys_readv64v2(unsigned long fd,
 910                 const struct compat_iovec __user *vec,
 911                 unsigned long vlen, loff_t pos, rwf_t flags);
 912 #endif
 913
 914 #ifdef __ARCH_WANT_COMPAT_SYS_PWRITEV64V2
 915 asmlinkage long compat_sys_pwritev64v2(unsigned long fd,
 916                 const struct compat_iovec __user *vec,
 917                 unsigned long vlen, loff_t pos, rwf_t flags);
 918 #endif
 919
 920
 921 /*
 922  * Deprecated system calls which are still defined in
 923  * include/uapi/asm-generic/unistd.h and wanted by >= 1 arch
 924  */
 925
 926 /* __ARCH_WANT_SYSCALL_NO_AT */
 927 asmlinkage long compat_sys_open(const char __user *filename, int flags,
 928                                 umode_t mode);
 929 asmlinkage long compat_sys_utimes(const char __user *filename,
 930                                   struct old_timeval32 __user *t);
 931
 932 /* __ARCH_WANT_SYSCALL_NO_FLAGS */
 933 asmlinkage long compat_sys_signalfd(int ufd,
 934                                     const compat_sigset_t __user *sigmask,
 935                                     compat_size_t sigsetsize);
 936
 937 /* __ARCH_WANT_SYSCALL_OFF_T */
 938 asmlinkage long compat_sys_newstat(const char __user *filename,
 939                                    struct compat_stat __user *statbuf);
 940 asmlinkage long compat_sys_newlstat(const char __user *filename,
 941                                     struct compat_stat __user *statbuf);
 942
 943 /* __ARCH_WANT_SYSCALL_DEPRECATED */
 944 asmlinkage long compat_sys_time(old_time32_t __user *tloc);
 945 asmlinkage long compat_sys_utime(const char __user *filename,
 946                                  struct old_utimbuf32 __user *t);
 947 asmlinkage long compat_sys_futimesat(unsigned int dfd,
 948                                      const char __user *filename,
 949                                      struct old_timeval32 __user *t);
 950 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
 951                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 952                 struct old_timeval32 __user *tvp);
 953 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u32);
 954 asmlinkage long compat_sys_recv(int fd, void __user *buf, compat_size_t len,
 955                                 unsigned flags);
 956 asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args);
 957
 958 /* obsolete: fs/readdir.c */
 959 asmlinkage long compat_sys_old_readdir(unsigned int fd,
 960                                        struct compat_old_linux_dirent __user *,
 961                                        unsigned int count);
 962
 963 /* obsolete: fs/select.c */
 964 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg);
 965
 966 /* obsolete: ipc */
 967 asmlinkage long compat_sys_ipc(u32, int, int, u32, compat_uptr_t, u32);
 968
 969 /* obsolete: kernel/signal.c */
 970 #ifdef __ARCH_WANT_SYS_SIGPENDING
 971 asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set);
 972 #endif
 973
 974 #ifdef __ARCH_WANT_SYS_SIGPROCMASK
 975 asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *nset,
 976                                        compat_old_sigset_t __user *oset);
 977 #endif
 978 #ifdef CONFIG_COMPAT_OLD_SIGACTION
 979 asmlinkage long compat_sys_sigaction(int sig,
 980                                    const struct compat_old_sigaction __user *act,
 981                                    struct compat_old_sigaction __user *oact);
 982 #endif
 983
 984 /* obsolete: kernel/time/time.c */
 985 asmlinkage long compat_sys_stime(old_time32_t __user *tptr);
 986
 987 /* obsolete: net/socket.c */
 988 asmlinkage long compat_sys_socketcall(int call, u32 __user *args);
 989
 990 #endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */
 991
 992
 993 /*
 994  * For most but not all architectures, "am I in a compat syscall?" and
 995  * "am I a compat task?" are the same question.  For architectures on which
 996  * they aren't the same question, arch code can override in_compat_syscall.
 997  */
 998
 999 #ifndef in_compat_syscall
1000 static inline bool in_compat_syscall(void) { return is_compat_task(); }
1001 #endif
1002
1003 /**
1004  * ns_to_old_timeval32 - Compat version of ns_to_timeval
1005  * @nsec:       the nanoseconds value to be converted
1006  *
1007  * Returns the old_timeval32 representation of the nsec parameter.
1008  */
1009 static inline struct old_timeval32 ns_to_old_timeval32(s64 nsec)
1010 {
1011         struct timeval tv;
1012         struct old_timeval32 ctv;
1013
1014         tv = ns_to_timeval(nsec);
1015         ctv.tv_sec = tv.tv_sec;
1016         ctv.tv_usec = tv.tv_usec;
1017
1018         return ctv;
1019 }
1020
1021 /*
1022  * Kernel code should not call compat syscalls (i.e., compat_sys_xyzyyz())
1023  * directly.  Instead, use one of the functions which work equivalently, such
1024  * as the kcompat_sys_xyzyyz() functions prototyped below.
1025  */
1026
1027 int kcompat_sys_statfs64(const char __user * pathname, compat_size_t sz,
1028                      struct compat_statfs64 __user * buf);
1029 int kcompat_sys_fstatfs64(unsigned int fd, compat_size_t sz,
1030                           struct compat_statfs64 __user * buf);
1031
1032 #else /* !CONFIG_COMPAT */
1033
1034 #define is_compat_task() (0)
1035 #ifndef in_compat_syscall
1036 static inline bool in_compat_syscall(void) { return false; }
1037 #endif
1038
1039 #endif /* CONFIG_COMPAT */
1040
1041 #endif /* _LINUX_COMPAT_H */