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mmap locking API: convert mmap_sem comments

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Convert comments that reference mmap_sem to reference mmap_lock instead.

[akpm@linux-foundation.org: fix up linux-next leftovers]
[akpm@linux-foundation.org: s/lockaphore/lock/, per Vlastimil]
[akpm@linux-foundation.org: more linux-next fixups, per Michel]

Signed-off-by: Michel Lespinasse <walken@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Cc: Davidlohr Bueso <dbueso@suse.de>
Cc: David Rientjes <rientjes@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Laurent Dufour <ldufour@linux.ibm.com>
Cc: Liam Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ying Han <yinghan@google.com>
Link: http://lkml.kernel.org/r/20200520052908.204642-13-walken@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Michel Lespinasse
2020-06-08 21:33:54 -07:00
committed by Linus Torvalds
parent 3e4e28c5a8
commit c1e8d7c6a7
113 changed files with 351 additions and 352 deletions
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20
mm/madvise.c
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@@ -40,7 +40,7 @@ struct madvise_walk_private {
/*
* Any behaviour which results in changes to the vma->vm_flags needs to
* take mmap_sem for writing. Others, which simply traverse vmas, need
* take mmap_lock for writing. Others, which simply traverse vmas, need
* to only take it for reading.
*/
static int madvise_need_mmap_write(int behavior)
@@ -165,7 +165,7 @@ static long madvise_behavior(struct vm_area_struct *vma,
success:
/*
* vm_flags is protected by the mmap_sem held in write mode.
* vm_flags is protected by the mmap_lock held in write mode.
*/
vma->vm_flags = new_flags;
@@ -285,9 +285,9 @@ static long madvise_willneed(struct vm_area_struct *vma,
* Filesystem's fadvise may need to take various locks. We need to
* explicitly grab a reference because the vma (and hence the
* vma's reference to the file) can go away as soon as we drop
* mmap_sem.
* mmap_lock.
*/
*prev = NULL; /* tell sys_madvise we drop mmap_sem */
*prev = NULL; /* tell sys_madvise we drop mmap_lock */
get_file(file);
mmap_read_unlock(current->mm);
offset = (loff_t)(start - vma->vm_start)
@@ -768,7 +768,7 @@ static long madvise_dontneed_free(struct vm_area_struct *vma,
return -EINVAL;
if (!userfaultfd_remove(vma, start, end)) {
*prev = NULL; /* mmap_sem has been dropped, prev is stale */
*prev = NULL; /* mmap_lock has been dropped, prev is stale */
mmap_read_lock(current->mm);
vma = find_vma(current->mm, start);
@@ -791,7 +791,7 @@ static long madvise_dontneed_free(struct vm_area_struct *vma,
if (end > vma->vm_end) {
/*
* Don't fail if end > vma->vm_end. If the old
* vma was splitted while the mmap_sem was
* vma was splitted while the mmap_lock was
* released the effect of the concurrent
* operation may not cause madvise() to
* have an undefined result. There may be an
@@ -826,7 +826,7 @@ static long madvise_remove(struct vm_area_struct *vma,
int error;
struct file *f;
*prev = NULL; /* tell sys_madvise we drop mmap_sem */
*prev = NULL; /* tell sys_madvise we drop mmap_lock */
if (vma->vm_flags & VM_LOCKED)
return -EINVAL;
@@ -847,11 +847,11 @@ static long madvise_remove(struct vm_area_struct *vma,
* Filesystem's fallocate may need to take i_mutex. We need to
* explicitly grab a reference because the vma (and hence the
* vma's reference to the file) can go away as soon as we drop
* mmap_sem.
* mmap_lock.
*/
get_file(f);
if (userfaultfd_remove(vma, start, end)) {
/* mmap_sem was not released by userfaultfd_remove() */
/* mmap_lock was not released by userfaultfd_remove() */
mmap_read_unlock(current->mm);
}
error = vfs_fallocate(f,
@@ -1153,7 +1153,7 @@ int do_madvise(unsigned long start, size_t len_in, int behavior)
goto out;
if (prev)
vma = prev->vm_next;
else /* madvise_remove dropped mmap_sem */
else /* madvise_remove dropped mmap_lock */
vma = find_vma(current->mm, start);
}
out: