Merge branch 'x86-process-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

* 'x86-process-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86-64: merge the standard and compat start_thread() functions
  x86-64: make compat_start_thread() match start_thread()

diff --git a/arch/x86/include/asm/elf.h b/arch/x86/include/asm/elf.h
index 456a304b817266320ad59d6f6b49419ea4e1aa15..8a024babe5e646a3b1f8282deeae9edcf70088ba 100644 (file)
--- a/arch/x86/include/asm/elf.h
+++ b/arch/x86/include/asm/elf.h
@@ -157,19 +157,6 @@ do {                                               \
 
 #define compat_elf_check_arch(x)       elf_check_arch_ia32(x)
 
-static inline void start_ia32_thread(struct pt_regs *regs, u32 ip, u32 sp)
-{
-       loadsegment(fs, 0);
-       loadsegment(ds, __USER32_DS);
-       loadsegment(es, __USER32_DS);
-       load_gs_index(0);
-       regs->ip = ip;
-       regs->sp = sp;
-       regs->flags = X86_EFLAGS_IF;
-       regs->cs = __USER32_CS;
-       regs->ss = __USER32_DS;
-}
-
 static inline void elf_common_init(struct thread_struct *t,
                                   struct pt_regs *regs, const u16 ds)
 {
@@ -191,11 +178,8 @@ do {                                                       \
 #define        COMPAT_ELF_PLAT_INIT(regs, load_addr)           \
        elf_common_init(&current->thread, regs, __USER_DS)
 
-#define        compat_start_thread(regs, ip, sp)               \
-do {                                                   \
-       start_ia32_thread(regs, ip, sp);                \
-       set_fs(USER_DS);                                \
-} while (0)
+void start_thread_ia32(struct pt_regs *regs, u32 new_ip, u32 new_sp);
+#define compat_start_thread start_thread_ia32
 
 #define COMPAT_SET_PERSONALITY(ex)                     \
 do {                                                   \

diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index a98fe88fab64df0a9b4e4e497939245e7a338fc6..c95c8f4e790ad8da17241ff55226e911832e01a3 100644 (file)
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -349,26 +349,42 @@ out:
        return err;
 }
 
-void
-start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
+static void
+start_thread_common(struct pt_regs *regs, unsigned long new_ip,
+                   unsigned long new_sp,
+                   unsigned int _cs, unsigned int _ss, unsigned int _ds)
 {
        loadsegment(fs, 0);
-       loadsegment(es, 0);
-       loadsegment(ds, 0);
+       loadsegment(es, _ds);
+       loadsegment(ds, _ds);
        load_gs_index(0);
        regs->ip                = new_ip;
        regs->sp                = new_sp;
        percpu_write(old_rsp, new_sp);
-       regs->cs                = __USER_CS;
-       regs->ss                = __USER_DS;
-       regs->flags             = 0x200;
+       regs->cs                = _cs;
+       regs->ss                = _ss;
+       regs->flags             = X86_EFLAGS_IF;
        set_fs(USER_DS);
        /*
         * Free the old FP and other extended state
         */
        free_thread_xstate(current);
 }
-EXPORT_SYMBOL_GPL(start_thread);
+
+void
+start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
+{
+       start_thread_common(regs, new_ip, new_sp,
+                           __USER_CS, __USER_DS, 0);
+}
+
+#ifdef CONFIG_IA32_EMULATION
+void start_thread_ia32(struct pt_regs *regs, u32 new_ip, u32 new_sp)
+{
+       start_thread_common(regs, new_ip, new_sp,
+                           __USER32_CS, __USER32_DS, __USER32_DS);
+}
+#endif
 
 /*
  *     switch_to(x,y) should switch tasks from x to y.