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authorMichel Lespinasse <walken@google.com>2020-06-08 21:33:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-09 09:39:14 -0700
commitd8ed45c5dcd455fc5848d47f86883a1b872ac0d0 (patch)
treef9270b32da5f3f7be73b086c99d3dfc29a13161a /mm/madvise.c
parent0adf65f53aae86aa86d8dccada02890545de8938 (diff)
downloadlinux-d8ed45c5dcd455fc5848d47f86883a1b872ac0d0.tar.bz2
mmap locking API: use coccinelle to convert mmap_sem rwsem call sites
This change converts the existing mmap_sem rwsem calls to use the new mmap locking API instead. The change is generated using coccinelle with the following rule: // spatch --sp-file mmap_lock_api.cocci --in-place --include-headers --dir . @@ expression mm; @@ ( -init_rwsem +mmap_init_lock | -down_write +mmap_write_lock | -down_write_killable +mmap_write_lock_killable | -down_write_trylock +mmap_write_trylock | -up_write +mmap_write_unlock | -downgrade_write +mmap_write_downgrade | -down_read +mmap_read_lock | -down_read_killable +mmap_read_lock_killable | -down_read_trylock +mmap_read_trylock | -up_read +mmap_read_unlock ) -(&mm->mmap_sem) +(mm) Signed-off-by: Michel Lespinasse <walken@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> 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: 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/20200520052908.204642-5-walken@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/madvise.c')
-rw-r--r--mm/madvise.c20
1 files changed, 10 insertions, 10 deletions
diff --git a/mm/madvise.c b/mm/madvise.c
index 8cbd8c1bfe15..d9b0f66b4396 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -289,12 +289,12 @@ static long madvise_willneed(struct vm_area_struct *vma,
*/
*prev = NULL; /* tell sys_madvise we drop mmap_sem */
get_file(file);
- up_read(&current->mm->mmap_sem);
+ mmap_read_unlock(current->mm);
offset = (loff_t)(start - vma->vm_start)
+ ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
vfs_fadvise(file, offset, end - start, POSIX_FADV_WILLNEED);
fput(file);
- down_read(&current->mm->mmap_sem);
+ mmap_read_lock(current->mm);
return 0;
}
@@ -770,7 +770,7 @@ static long madvise_dontneed_free(struct vm_area_struct *vma,
if (!userfaultfd_remove(vma, start, end)) {
*prev = NULL; /* mmap_sem has been dropped, prev is stale */
- down_read(&current->mm->mmap_sem);
+ mmap_read_lock(current->mm);
vma = find_vma(current->mm, start);
if (!vma)
return -ENOMEM;
@@ -852,13 +852,13 @@ static long madvise_remove(struct vm_area_struct *vma,
get_file(f);
if (userfaultfd_remove(vma, start, end)) {
/* mmap_sem was not released by userfaultfd_remove() */
- up_read(&current->mm->mmap_sem);
+ mmap_read_unlock(current->mm);
}
error = vfs_fallocate(f,
FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
offset, end - start);
fput(f);
- down_read(&current->mm->mmap_sem);
+ mmap_read_lock(current->mm);
return error;
}
@@ -1089,7 +1089,7 @@ int do_madvise(unsigned long start, size_t len_in, int behavior)
write = madvise_need_mmap_write(behavior);
if (write) {
- if (down_write_killable(&current->mm->mmap_sem))
+ if (mmap_write_lock_killable(current->mm))
return -EINTR;
/*
@@ -1105,11 +1105,11 @@ int do_madvise(unsigned long start, size_t len_in, int behavior)
* model.
*/
if (!mmget_still_valid(current->mm)) {
- up_write(&current->mm->mmap_sem);
+ mmap_write_unlock(current->mm);
return -EINTR;
}
} else {
- down_read(&current->mm->mmap_sem);
+ mmap_read_lock(current->mm);
}
/*
@@ -1159,9 +1159,9 @@ int do_madvise(unsigned long start, size_t len_in, int behavior)
out:
blk_finish_plug(&plug);
if (write)
- up_write(&current->mm->mmap_sem);
+ mmap_write_unlock(current->mm);
else
- up_read(&current->mm->mmap_sem);
+ mmap_read_unlock(current->mm);
return error;
}