diff options
| author |   Matthew Wilcox (Oracle) <willy@infradead.org> | 2020-04-06 20:09:08 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-07 10:43:42 -0700 |
| commit | d07ded611e46d276d41dafcbd6abc9dd7ab51a7f (patch) | |
| tree | ef0a94d4b403c331c36d7fabd6b36a518505955a /fs | |
| parent | proc: speed up /proc/*/statm (diff) | |
| download | linux-dev-d07ded611e46d276d41dafcbd6abc9dd7ab51a7f.tar.xz linux-dev-d07ded611e46d276d41dafcbd6abc9dd7ab51a7f.zip | |
proc: inline vma_stop into m_stop
Instead of calling vma_stop() from m_start() and m_next(), do its work
in m_stop().
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20200317193201.9924-1-adobriyan@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/proc/task_mmu.c | 34 |
1 files changed, 15 insertions, 19 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 3ba9ae83bff5..4b19a46d351f 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -123,15 +123,6 @@ static void release_task_mempolicy(struct proc_maps_private *priv) } #endif -static void vma_stop(struct proc_maps_private *priv) -{ - struct mm_struct *mm = priv->mm; - - release_task_mempolicy(priv); - up_read(&mm->mmap_sem); - mmput(mm); -} - static struct vm_area_struct * m_next_vma(struct proc_maps_private *priv, struct vm_area_struct *vma) { @@ -163,11 +154,16 @@ static void *m_start(struct seq_file *m, loff_t *ppos) return ERR_PTR(-ESRCH); mm = priv->mm; - if (!mm || !mmget_not_zero(mm)) + if (!mm || !mmget_not_zero(mm)) { + put_task_struct(priv->task); + priv->task = NULL; return NULL; + } if (down_read_killable(&mm->mmap_sem)) { mmput(mm); + put_task_struct(priv->task); + priv->task = NULL; return ERR_PTR(-EINTR); } @@ -195,7 +191,6 @@ static void *m_start(struct seq_file *m, loff_t *ppos) if (pos == mm->map_count && priv->tail_vma) return priv->tail_vma; - vma_stop(priv); return NULL; } @@ -206,21 +201,22 @@ static void *m_next(struct seq_file *m, void *v, loff_t *pos) (*pos)++; next = m_next_vma(priv, v); - if (!next) - vma_stop(priv); return next; } static void m_stop(struct seq_file *m, void *v) { struct proc_maps_private *priv = m->private; + struct mm_struct *mm = priv->mm; - if (!IS_ERR_OR_NULL(v)) - vma_stop(priv); - if (priv->task) { - put_task_struct(priv->task); - priv->task = NULL; - } + if (!priv->task) + return; + + release_task_mempolicy(priv); + up_read(&mm->mmap_sem); + mmput(mm); + put_task_struct(priv->task); + priv->task = NULL; } static int proc_maps_open(struct inode *inode, struct file *file, |