MS_NOUSER defined as signed int (1<<31), sb->s_flags declared as unsigned long.
So (sb->s_flags & MS_NOUSER) works as (sb->s_flags & 0xffffffff80000000).
Other potential bugs: git grep -w -e '1\s*<<\s*31'
Signed-off-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
---
include/linux/fs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 6b71bd6..903bf00 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -217,7 +217,7 @@ struct inodes_stat_t {
#define MS_NOSEC (1<<28)
#define MS_BORN (1<<29)
#define MS_ACTIVE (1<<30)
-#define MS_NOUSER (1<<31)
+#define MS_NOUSER (1u<<31)
/*
* Superblock flags that can be altered by MS_REMOUNT
--
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