Commit 52a2b53f authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Linus Torvalds

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: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: default avatarMatthew Wilcox <willy@linux.intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 46c043ed
......@@ -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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