From: Eric Biggers <ebiggers@google.com>
Date: Sat, 3 Dec 2016 20:28:53 +0000 (-0500)
Subject: mbcache: don't BUG() if entry cache cannot be allocated
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=21d0f4fa8e7b026cdae988f99f4c3aab154d5b7c;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

mbcache: don't BUG() if entry cache cannot be allocated

mbcache can be a module that is loaded long after startup, when someone
asks to mount an ext2 or ext4 filesystem.  Therefore it should not BUG()
if kmem_cache_create() fails, but rather just fail the module load.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
---

diff --git a/fs/mbcache.c b/fs/mbcache.c
index 31e54c25d16f..c56ab2164d6b 100644
--- a/fs/mbcache.c
+++ b/fs/mbcache.c
@@ -420,7 +420,8 @@ static int __init mbcache_init(void)
 	mb_entry_cache = kmem_cache_create("mbcache",
 				sizeof(struct mb_cache_entry), 0,
 				SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL);
-	BUG_ON(!mb_entry_cache);
+	if (!mb_entry_cache)
+		return -ENOMEM;
 	return 0;
 }