xiaomi-sm8450/android_kernel_xiaomi_sm8450
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Merge branch 'for-linus' into for-next

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This commit is contained in:
Al Viro
2015-04-11 22:29:51 -04:00
parent 165f1a6e30 64b4e2526d
commit dfea934575
4 changed files with 35 additions and 16 deletions
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22
fs/aio.c
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@@ -310,11 +310,11 @@ static int aio_ring_mmap(struct file *file, struct vm_area_struct *vma)
return 0;
}
static void aio_ring_remap(struct file *file, struct vm_area_struct *vma)
static int aio_ring_remap(struct file *file, struct vm_area_struct *vma)
{
struct mm_struct *mm = vma->vm_mm;
struct kioctx_table *table;
int i;
int i, res = -EINVAL;
spin_lock(&mm->ioctx_lock);
rcu_read_lock();
@@ -324,13 +324,17 @@ static void aio_ring_remap(struct file *file, struct vm_area_struct *vma)
ctx = table->table[i];
if (ctx && ctx->aio_ring_file == file) {
ctx->user_id = ctx->mmap_base = vma->vm_start;
if (!atomic_read(&ctx->dead)) {
ctx->user_id = ctx->mmap_base = vma->vm_start;
res = 0;
}
break;
}
}
rcu_read_unlock();
spin_unlock(&mm->ioctx_lock);
return res;
}
static const struct file_operations aio_ring_fops = {
@@ -759,6 +763,9 @@ static struct kioctx *ioctx_alloc(unsigned nr_events)
err_cleanup:
aio_nr_sub(ctx->max_reqs);
err_ctx:
atomic_set(&ctx->dead, 1);
if (ctx->mmap_size)
vm_munmap(ctx->mmap_base, ctx->mmap_size);
aio_free_ring(ctx);
err:
mutex_unlock(&ctx->ring_lock);
@@ -780,11 +787,12 @@ static int kill_ioctx(struct mm_struct *mm, struct kioctx *ctx,
{
struct kioctx_table *table;
if (atomic_xchg(&ctx->dead, 1))
return -EINVAL;
spin_lock(&mm->ioctx_lock);
if (atomic_xchg(&ctx->dead, 1)) {
spin_unlock(&mm->ioctx_lock);
return -EINVAL;
}
table = rcu_dereference_raw(mm->ioctx_table);
WARN_ON(ctx != table->table[ctx->id]);
table->table[ctx->id] = NULL;