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mm: fix refcounting in swapon
[firefly-linux-kernel-4.4.55.git]
/
mm
/
swapfile.c
diff --git
a/mm/swapfile.c
b/mm/swapfile.c
index 07a458d72fa880f5adc366b8acf03e610841880e..0341c5700e346fa62401e9815720ed85af3a20c9 100644
(file)
--- a/
mm/swapfile.c
+++ b/
mm/swapfile.c
@@
-1940,7
+1940,7
@@
SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
error = -EINVAL;
if (S_ISBLK(inode->i_mode)) {
- bdev =
I_BDEV(inode
);
+ bdev =
bdgrab(I_BDEV(inode)
);
error = blkdev_get(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL,
sys_swapon);
if (error < 0) {