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authorPavel Skripkin <paskripkin@gmail.com>2021-11-09 05:35:25 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-11-09 21:02:52 +0300
commit7eb0e28c1d3147e2234512e2beeb99183ac99f58 (patch)
tree5a1fe1a7d9ba50d3ba07f41c2f864b1b3ef3e17b
parentba1f70ddd1809c03660ddcfb757e1c1ced8b676d (diff)
downloadlinux-7eb0e28c1d3147e2234512e2beeb99183ac99f58.tar.xz
sysv: use BUILD_BUG_ON instead of runtime check
There were runtime checks about sizes of struct v7_super_block and struct sysv_inode. If one of these checks fail the kernel will panic. Since these values are known at compile time let's use BUILD_BUG_ON(), because it's a standard mechanism for validation checking at build time Link: https://lkml.kernel.org/r/20210813123020.22971-1-paskripkin@gmail.com Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Pavel Skripkin <paskripkin@gmail.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/sysv/super.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/sysv/super.c b/fs/sysv/super.c
index cc8e2ed155c8..d1def0771a40 100644
--- a/fs/sysv/super.c
+++ b/fs/sysv/super.c
@@ -474,10 +474,8 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
struct sysv_sb_info *sbi;
struct buffer_head *bh;
- if (440 != sizeof (struct v7_super_block))
- panic("V7 FS: bad super-block size");
- if (64 != sizeof (struct sysv_inode))
- panic("sysv fs: bad i-node size");
+ BUILD_BUG_ON(sizeof(struct v7_super_block) != 440);
+ BUILD_BUG_ON(sizeof(struct sysv_inode) != 64);
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
if (!sbi)