From: Nick Piggin <npiggin@suse.de>

Don't miss unlocking a locked page in GFS2.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/gfs2/ops_vm.c |    2 ++
 1 files changed, 2 insertions(+)

diff -puN fs/gfs2/ops_vm.c~mm-fix-fault-vs-invalidate-race-for-linear-mappings-fix fs/gfs2/ops_vm.c
--- a/fs/gfs2/ops_vm.c~mm-fix-fault-vs-invalidate-race-for-linear-mappings-fix
+++ a/fs/gfs2/ops_vm.c
@@ -138,6 +138,8 @@ static struct page *gfs2_sharewrite_nopa
 	if (alloc_required) {
 		error = alloc_page_backing(ip, result);
 		if (error) {
+			if (area->vm_flags & VM_CAN_INVALIDATE)
+				unlock_page(result);
 			page_cache_release(result);
 			result = NULL;
 			goto out;
_