[PATCH v1 4/9] ext2: mark statfs overhead cache as guarded by s_lock

[Timothy Day]

s_overhead_last and s_blocks_last cache the filesystem overhead
computation and are only ever accessed in ext2_statfs() under s_lock.
Annotate them with __guarded_by() for Clang's context analysis.

Signed-off-by: Timothy Day <timday@xxxxxxxxxxxxxxxxxxxxxxx>
---
 fs/ext2/ext2.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index c8bf2e69675dc..ecca898653eb8 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -77,8 +77,8 @@ struct ext2_sb_info {
 	unsigned long s_gdb_count;	/* Number of group descriptor blocks */
 	unsigned long s_desc_per_block;	/* Number of group descriptors per block */
 	unsigned long s_groups_count;	/* Number of groups in the fs */
-	unsigned long s_overhead_last;  /* Last calculated overhead */
-	unsigned long s_blocks_last;    /* Last seen block count */
+	unsigned long s_overhead_last __guarded_by(&s_lock);  /* Last calculated overhead */
+	unsigned long s_blocks_last __guarded_by(&s_lock);    /* Last seen block count */
 	struct buffer_head * s_sbh;	/* Buffer containing the super block */
 	struct ext2_super_block * s_es;	/* Pointer to the super block in the buffer */
 	struct buffer_head ** s_group_desc;
-- 
2.39.5