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[PATCH] Remove 'volatile' from spinlock_types

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This is a resubmission of patches originally created by Ingo Molnar.
The link below is the initial (?) posting of the patch.

  http://marc.theaimsgroup.com/?l=linux-kernel&m=115217423929806&w=2

Remove 'volatile' from spinlock_types as it causes GCC to generate bad
code (see link) and locking should be used on kernel data.

Signed-off-by: Art Haas <ahaas@airmail.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Art Haas 2006-12-06 14:45:53 -06:00 committed by Linus Torvalds
parent 3e577a80ea
commit 16afea0255
2 changed files with 4 additions and 4 deletions
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4
include/asm-i386/spinlock_types.h
View File

@ -6,13 +6,13 @@
#endif
typedef struct {
volatile unsigned int slock;
unsigned int slock;
} raw_spinlock_t;
#define __RAW_SPIN_LOCK_UNLOCKED { 1 }
typedef struct {
volatile unsigned int lock;
unsigned int lock;
} raw_rwlock_t;
#define __RAW_RW_LOCK_UNLOCKED { RW_LOCK_BIAS }

4
include/asm-x86_64/spinlock_types.h
View File

@ -6,13 +6,13 @@
#endif
typedef struct {
volatile unsigned int slock;
unsigned int slock;
} raw_spinlock_t;
#define __RAW_SPIN_LOCK_UNLOCKED { 1 }
typedef struct {
volatile unsigned int lock;
unsigned int lock;
} raw_rwlock_t;
#define __RAW_RW_LOCK_UNLOCKED { RW_LOCK_BIAS }