Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[sfrench/cifs-2.6.git] / kernel / fork.c
index d6e552552e526d5ec9bc078170f0fcabc8b12abf..f9572f416126283dd2e8ac6ce3bfd66899e58016 100644 (file)
@@ -125,6 +125,15 @@ int nr_threads;                    /* The idle threads do not count.. */
 
 static int max_threads;                /* tunable limit on nr_threads */
 
+#define NAMED_ARRAY_INDEX(x)   [x] = __stringify(x)
+
+static const char * const resident_page_types[] = {
+       NAMED_ARRAY_INDEX(MM_FILEPAGES),
+       NAMED_ARRAY_INDEX(MM_ANONPAGES),
+       NAMED_ARRAY_INDEX(MM_SWAPENTS),
+       NAMED_ARRAY_INDEX(MM_SHMEMPAGES),
+};
+
 DEFINE_PER_CPU(unsigned long, process_counts) = 0;
 
 __cacheline_aligned DEFINE_RWLOCK(tasklist_lock);  /* outer */
@@ -645,12 +654,15 @@ static void check_mm(struct mm_struct *mm)
 {
        int i;
 
+       BUILD_BUG_ON_MSG(ARRAY_SIZE(resident_page_types) != NR_MM_COUNTERS,
+                        "Please make sure 'struct resident_page_types[]' is updated as well");
+
        for (i = 0; i < NR_MM_COUNTERS; i++) {
                long x = atomic_long_read(&mm->rss_stat.count[i]);
 
                if (unlikely(x))
-                       printk(KERN_ALERT "BUG: Bad rss-counter state "
-                                         "mm:%p idx:%d val:%ld\n", mm, i, x);
+                       pr_alert("BUG: Bad rss-counter state mm:%p type:%s val:%ld\n",
+                                mm, resident_page_types[i], x);
        }
 
        if (mm_pgtables_bytes(mm))
@@ -1011,7 +1023,6 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p,
        mm_init_owner(mm, p);
        RCU_INIT_POINTER(mm->exe_file, NULL);
        mmu_notifier_mm_init(mm);
-       hmm_mm_init(mm);
        init_tlb_flush_pending(mm);
 #if defined(CONFIG_TRANSPARENT_HUGEPAGE) && !USE_SPLIT_PMD_PTLOCKS
        mm->pmd_huge_pte = NULL;
@@ -1521,28 +1532,17 @@ void __cleanup_sighand(struct sighand_struct *sighand)
        }
 }
 
-#ifdef CONFIG_POSIX_TIMERS
 /*
  * Initialize POSIX timer handling for a thread group.
  */
 static void posix_cpu_timers_init_group(struct signal_struct *sig)
 {
+       struct posix_cputimers *pct = &sig->posix_cputimers;
        unsigned long cpu_limit;
 
        cpu_limit = READ_ONCE(sig->rlim[RLIMIT_CPU].rlim_cur);
-       if (cpu_limit != RLIM_INFINITY) {
-               sig->cputime_expires.prof_exp = cpu_limit * NSEC_PER_SEC;
-               sig->cputimer.running = true;
-       }
-
-       /* The timer lists. */
-       INIT_LIST_HEAD(&sig->cpu_timers[0]);
-       INIT_LIST_HEAD(&sig->cpu_timers[1]);
-       INIT_LIST_HEAD(&sig->cpu_timers[2]);
+       posix_cputimers_group_init(pct, cpu_limit);
 }
-#else
-static inline void posix_cpu_timers_init_group(struct signal_struct *sig) { }
-#endif
 
 static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
 {
@@ -1644,23 +1644,6 @@ static void rt_mutex_init_task(struct task_struct *p)
 #endif
 }
 
-#ifdef CONFIG_POSIX_TIMERS
-/*
- * Initialize POSIX timer handling for a single task.
- */
-static void posix_cpu_timers_init(struct task_struct *tsk)
-{
-       tsk->cputime_expires.prof_exp = 0;
-       tsk->cputime_expires.virt_exp = 0;
-       tsk->cputime_expires.sched_exp = 0;
-       INIT_LIST_HEAD(&tsk->cpu_timers[0]);
-       INIT_LIST_HEAD(&tsk->cpu_timers[1]);
-       INIT_LIST_HEAD(&tsk->cpu_timers[2]);
-}
-#else
-static inline void posix_cpu_timers_init(struct task_struct *tsk) { }
-#endif
-
 static inline void init_task_pid_links(struct task_struct *task)
 {
        enum pid_type type;
@@ -1947,7 +1930,7 @@ static __latent_entropy struct task_struct *copy_process(
        task_io_accounting_init(&p->ioac);
        acct_clear_integrals(p);
 
-       posix_cpu_timers_init(p);
+       posix_cputimers_init(&p->posix_cputimers);
 
        p->io_context = NULL;
        audit_set_context(p, NULL);