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udf: Convert UDF_SB(sb)->s_flags to use bitops

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Use atomic bitops to manipulate with sb flags to make manipulation safe
without any locking.

Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara
2010-10-20 17:25:59 +02:00
parent fab3c8581f
commit f2a6cc1f14
1 changed files with 16 additions and 4 deletions
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20
fs/udf/udf_sb.h
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@@ -2,6 +2,7 @@
#define __LINUX_UDF_SB_H #define __LINUX_UDF_SB_H
#include <linux/mutex.h> #include <linux/mutex.h>
#include <linux/bitops.h>
/* Since UDF 2.01 is ISO 13346 based... */ /* Since UDF 2.01 is ISO 13346 based... */
#define UDF_SUPER_MAGIC 0x15013346 #define UDF_SUPER_MAGIC 0x15013346
@@ -139,7 +140,7 @@ struct udf_sb_info {
__u16 s_udfrev; __u16 s_udfrev;
/* Miscellaneous flags */ /* Miscellaneous flags */
__u32 s_flags; unsigned long s_flags;
/* Encoding info */ /* Encoding info */
struct nls_table *s_nls_map; struct nls_table *s_nls_map;
@@ -161,8 +162,19 @@ struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct udf_sb_info *sbi);
int udf_compute_nr_groups(struct super_block *sb, u32 partition); int udf_compute_nr_groups(struct super_block *sb, u32 partition);
#define UDF_QUERY_FLAG(X,Y) ( UDF_SB(X)->s_flags & ( 1 << (Y) ) ) static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
#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) ) ) 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 */ #endif /* __LINUX_UDF_SB_H */