Btrfs on Sparc64 produces a lot of warnings
Kernel unaligned access at TPC[10148c84] btrfs_csum_final+0x44/0x60 [btrfs]
It happens when btrfs_csum_final is called from write_dev_supers():
2195: btrfs_csum_final(crc, sb->csum);
crc is u32, aligning sb->csum on 4-byte boundary fixes the problem.
Signed-off-by: Alexander Beregalov <a.beregalov@xxxxxxxxx>
---
fs/btrfs/ctree.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 0af2e38..4dbf330 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -327,7 +327,7 @@ struct btrfs_header {
* it currently lacks any block count etc etc
*/
struct btrfs_super_block {
- u8 csum[BTRFS_CSUM_SIZE];
+ u8 csum[BTRFS_CSUM_SIZE] __attribute__ ((aligned(4)));
/* the first 4 fields must match struct btrfs_header */
u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
__le64 bytenr; /* this block number */
--
1.7.0.2
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