udf: Convert UDF_SB(sb)->s_flags to use bitops
Use atomic bitops to manipulate with sb flags to make manipulation safe
without any locking.
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index d113b72..9f38a6c 100644
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -2,6 +2,7 @@
#define __LINUX_UDF_SB_H
#include <linux/mutex.h>
+#include <linux/bitops.h>
/* Since UDF 2.01 is ISO 13346 based... */
#define UDF_SUPER_MAGIC 0x15013346
@@ -139,7 +140,7 @@
__u16 s_udfrev;
/* Miscellaneous flags */
- __u32 s_flags;
+ unsigned long s_flags;
/* Encoding info */
struct nls_table *s_nls_map;
@@ -161,8 +162,19 @@
int udf_compute_nr_groups(struct super_block *sb, u32 partition);
-#define UDF_QUERY_FLAG(X,Y) ( UDF_SB(X)->s_flags & ( 1 << (Y) ) )
-#define UDF_SET_FLAG(X,Y) ( UDF_SB(X)->s_flags |= ( 1 << (Y) ) )
-#define UDF_CLEAR_FLAG(X,Y) ( UDF_SB(X)->s_flags &= ~( 1 << (Y) ) )
+static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
+{
+ return test_bit(flag, &UDF_SB(sb)->s_flags);
+}
+
+static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
+{
+ set_bit(flag, &UDF_SB(sb)->s_flags);
+}
+
+static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
+{
+ clear_bit(flag, &UDF_SB(sb)->s_flags);
+}
#endif /* __LINUX_UDF_SB_H */