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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2015-09-08 14:59:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-08 15:35:28 -0700
commit52a2b53ffde6d6018dfc454fbde34383351fb896 (patch)
tree776c011c78152bccfa7e1ce6730b619143534ef5 /mm/memory.c
parent46c043ede4711e8d598b9d63c5616c1fedb0605e (diff)
downloadop-kernel-dev-52a2b53ffde6d6018dfc454fbde34383351fb896.zip
op-kernel-dev-52a2b53ffde6d6018dfc454fbde34383351fb896.tar.gz
mm, dax: use i_mmap_unlock_write() in do_cow_fault()
__dax_fault() takes i_mmap_lock for write. Let's pair it with write unlock on do_cow_fault() side. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
-rw-r--r--mm/memory.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/mm/memory.c b/mm/memory.c
index ce8e983..6cd0b21 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3013,9 +3013,9 @@ static int do_cow_fault(struct mm_struct *mm, struct vm_area_struct *vma,
} else {
/*
* The fault handler has no page to lock, so it holds
- * i_mmap_lock for read to protect against truncate.
+ * i_mmap_lock for write to protect against truncate.
*/
- i_mmap_unlock_read(vma->vm_file->f_mapping);
+ i_mmap_unlock_write(vma->vm_file->f_mapping);
}
goto uncharge_out;
}
@@ -3029,9 +3029,9 @@ static int do_cow_fault(struct mm_struct *mm, struct vm_area_struct *vma,
} else {
/*
* The fault handler has no page to lock, so it holds
- * i_mmap_lock for read to protect against truncate.
+ * i_mmap_lock for write to protect against truncate.
*/
- i_mmap_unlock_read(vma->vm_file->f_mapping);
+ i_mmap_unlock_write(vma->vm_file->f_mapping);
}
return ret;
uncharge_out:
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