ASoC: SAMSUNG: Debug wrong parameter

[karo-tx-linux.git] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index 98b450876f93878b437bbbc6efe6abd1c4028b29..3b159c5991b7561bdba253eeb479f91622a35fb9 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -65,6 +65,7 @@
 #include <linux/perf_event.h>
 #include <linux/posix-timers.h>
 #include <linux/user-return-notifier.h>
+#include <linux/oom.h>
 
 #include <asm/pgtable.h>
 #include <asm/pgalloc.h>
@@ -300,7 +301,7 @@ out:
 #ifdef CONFIG_MMU
 static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
 {
-       struct vm_area_struct *mpnt, *tmp, **pprev;
+       struct vm_area_struct *mpnt, *tmp, *prev, **pprev;
        struct rb_node **rb_link, *rb_parent;
        int retval;
        unsigned long charge;
@@ -328,6 +329,7 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
        if (retval)
                goto out;
 
+       prev = NULL;
        for (mpnt = oldmm->mmap; mpnt; mpnt = mpnt->vm_next) {
                struct file *file;
 
@@ -355,11 +357,11 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
                if (IS_ERR(pol))
                        goto fail_nomem_policy;
                vma_set_policy(tmp, pol);
+               tmp->vm_mm = mm;
                if (anon_vma_fork(tmp, mpnt))
                        goto fail_nomem_anon_vma_fork;
                tmp->vm_flags &= ~VM_LOCKED;
-               tmp->vm_mm = mm;
-               tmp->vm_next = NULL;
+               tmp->vm_next = tmp->vm_prev = NULL;
                file = tmp->vm_file;
                if (file) {
                        struct inode *inode = file->f_path.dentry->d_inode;
@@ -392,6 +394,8 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
                 */
                *pprev = tmp;
                pprev = &tmp->vm_next;
+               tmp->vm_prev = prev;
+               prev = tmp;
 
                __vma_link_rb(mm, tmp, rb_link, rb_parent);
                rb_link = &tmp->vm_rb.rb_right;
@@ -485,6 +489,7 @@ static struct mm_struct * mm_init(struct mm_struct * mm, struct task_struct *p)
        mm->cached_hole_size = ~0UL;
        mm_init_aio(mm);
        mm_init_owner(mm, p);
+       atomic_set(&mm->oom_disable_count, 0);
 
        if (likely(!mm_alloc_pgd(mm))) {
                mm->def_flags = 0;
@@ -738,6 +743,8 @@ good_mm:
        /* Initializing for Swap token stuff */
        mm->token_priority = 0;
        mm->last_interval = 0;
+       if (tsk->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
+               atomic_inc(&mm->oom_disable_count);
 
        tsk->mm = mm;
        tsk->active_mm = mm;
@@ -752,13 +759,13 @@ static int copy_fs(unsigned long clone_flags, struct task_struct *tsk)
        struct fs_struct *fs = current->fs;
        if (clone_flags & CLONE_FS) {
                /* tsk->fs is already what we want */
-               write_lock(&fs->lock);
+               spin_lock(&fs->lock);
                if (fs->in_exec) {
-                       write_unlock(&fs->lock);
+                       spin_unlock(&fs->lock);
                        return -EAGAIN;
                }
                fs->users++;
-               write_unlock(&fs->lock);
+               spin_unlock(&fs->lock);
                return 0;
        }
        tsk->fs = copy_fs_struct(fs);
@@ -901,6 +908,8 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
        sig->oom_adj = current->signal->oom_adj;
        sig->oom_score_adj = current->signal->oom_score_adj;
 
+       mutex_init(&sig->cred_guard_mutex);
+
        return 0;
 }
 
@@ -1296,8 +1305,13 @@ bad_fork_cleanup_io:
 bad_fork_cleanup_namespaces:
        exit_task_namespaces(p);
 bad_fork_cleanup_mm:
-       if (p->mm)
+       if (p->mm) {
+               task_lock(p);
+               if (p->signal->oom_score_adj == OOM_SCORE_ADJ_MIN)
+                       atomic_dec(&p->mm->oom_disable_count);
+               task_unlock(p);
                mmput(p->mm);
+       }
 bad_fork_cleanup_signal:
        if (!(clone_flags & CLONE_THREAD))
                free_signal_struct(p->signal);
@@ -1676,13 +1690,13 @@ SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)
 
                if (new_fs) {
                        fs = current->fs;
-                       write_lock(&fs->lock);
+                       spin_lock(&fs->lock);
                        current->fs = new_fs;
                        if (--fs->users)
                                new_fs = NULL;
                        else
                                new_fs = fs;
-                       write_unlock(&fs->lock);
+                       spin_unlock(&fs->lock);
                }
 
                if (new_mm) {
@@ -1690,6 +1704,10 @@ SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)
                        active_mm = current->active_mm;
                        current->mm = new_mm;
                        current->active_mm = new_mm;
+                       if (current->signal->oom_score_adj == OOM_SCORE_ADJ_MIN) {
+                               atomic_dec(&mm->oom_disable_count);
+                               atomic_inc(&new_mm->oom_disable_count);
+                       }
                        activate_mm(active_mm, new_mm);
                        new_mm = mm;
                }