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mm: use mmget_not_zero() helper

Browse source 
We already have the helper, we can convert the rest of the kernel
mechanically using:

  git grep -l 'atomic_inc_not_zero.*mm_users' | xargs sed -i 's/atomic_inc_not_zero(&\(.*\)->mm_users)/mmget_not_zero\(\1\)/'

This is needed for a later patch that hooks into the helper, but might
be a worthwhile cleanup on its own.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Vegard Nossum <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Acked-by: David Rientjes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Vegard Nossum 2017-02-27 14:30:13 -08:00 • committed by Linus Torvalds
commit 388f793455
7 changed files with 9 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

4
fs/proc/base.c
View file

@ -813,7 +813,7 @@ static ssize_t mem_rw(struct file *file, char __user *buf,
return -ENOMEM;
copied = 0;
if (!atomic_inc_not_zero(&mm->mm_users))
if (!mmget_not_zero(mm))
goto free;
/* Maybe we should limit FOLL_FORCE to actual ptrace users? */
@ -921,7 +921,7 @@ static ssize_t environ_read(struct file *file, char __user *buf,
return -ENOMEM;
ret = 0;
if (!atomic_inc_not_zero(&mm->mm_users))
if (!mmget_not_zero(mm))
goto free;
down_read(&mm->mmap_sem);

4
fs/proc/task_mmu.c
View file

@ -167,7 +167,7 @@ static void *m_start(struct seq_file *m, loff_t *ppos)
return ERR_PTR(-ESRCH);
mm = priv->mm;
if (!mm || !atomic_inc_not_zero(&mm->mm_users))
if (!mm || !mmget_not_zero(mm))
return NULL;
down_read(&mm->mmap_sem);
@ -1352,7 +1352,7 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
unsigned long end_vaddr;
int ret = 0, copied = 0;
if (!mm || !atomic_inc_not_zero(&mm->mm_users))
if (!mm || !mmget_not_zero(mm))
goto out;
ret = -EINVAL;

2
fs/proc/task_nommu.c
View file

@ -219,7 +219,7 @@ static void *m_start(struct seq_file *m, loff_t *pos)
return ERR_PTR(-ESRCH);
mm = priv->mm;
if (!mm || !atomic_inc_not_zero(&mm->mm_users))
if (!mm || !mmget_not_zero(mm))
return NULL;
down_read(&mm->mmap_sem);