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Revert "[PATCH] Enforce "unsigned long flags;" when spinlocking"
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This reverts commit ee3ce19, since it
broke on at least ARM, MIPS and PA-RISC due to complicated header file
dependencies.

Conflicts in include/linux/spinlock.h (due to the "nested" variety
fixes) fixed up by hand.

Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Kyle McMartin <kyle@parisc-linux.org>
Cc: Russell King <rmk+lkml@arm.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Linus Torvalds committed Nov 27, 2006
1 parent 137b529 commit b8e6ec8
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Showing 2 changed files with 20 additions and 86 deletions.
37 changes: 5 additions & 32 deletions include/linux/irqflags.h
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Original file line number Diff line number Diff line change
Expand Up @@ -11,12 +11,6 @@
#ifndef _LINUX_TRACE_IRQFLAGS_H
#define _LINUX_TRACE_IRQFLAGS_H

#define BUILD_CHECK_IRQ_FLAGS(flags) \
do { \
BUILD_BUG_ON(sizeof(flags) != sizeof(unsigned long)); \
typecheck(unsigned long, flags); \
} while (0)

#ifdef CONFIG_TRACE_IRQFLAGS
extern void trace_hardirqs_on(void);
extern void trace_hardirqs_off(void);
Expand Down Expand Up @@ -56,15 +50,10 @@
#define local_irq_disable() \
do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0)
#define local_irq_save(flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
raw_local_irq_save(flags); \
trace_hardirqs_off(); \
} while (0)
do { raw_local_irq_save(flags); trace_hardirqs_off(); } while (0)

#define local_irq_restore(flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
if (raw_irqs_disabled_flags(flags)) { \
raw_local_irq_restore(flags); \
trace_hardirqs_off(); \
Expand All @@ -80,16 +69,8 @@
*/
# define raw_local_irq_disable() local_irq_disable()
# define raw_local_irq_enable() local_irq_enable()
# define raw_local_irq_save(flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
local_irq_save(flags); \
} while (0)
# define raw_local_irq_restore(flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
local_irq_restore(flags); \
} while (0)
# define raw_local_irq_save(flags) local_irq_save(flags)
# define raw_local_irq_restore(flags) local_irq_restore(flags)
#endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */

#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
Expand All @@ -99,11 +80,7 @@
raw_safe_halt(); \
} while (0)

#define local_save_flags(flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
raw_local_save_flags(flags); \
} while (0)
#define local_save_flags(flags) raw_local_save_flags(flags)

#define irqs_disabled() \
({ \
Expand All @@ -113,11 +90,7 @@
raw_irqs_disabled_flags(flags); \
})

#define irqs_disabled_flags(flags) \
({ \
BUILD_CHECK_IRQ_FLAGS(flags); \
raw_irqs_disabled_flags(flags); \
})
#define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags)
#endif /* CONFIG_X86 */

#endif
69 changes: 15 additions & 54 deletions include/linux/spinlock.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -52,7 +52,6 @@
#include <linux/thread_info.h>
#include <linux/kernel.h>
#include <linux/stringify.h>
#include <linux/irqflags.h>

#include <asm/system.h>

Expand Down Expand Up @@ -184,52 +183,24 @@ do { \
#define read_lock(lock) _read_lock(lock)

#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
#define spin_lock_irqsave(lock, flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
flags = _spin_lock_irqsave(lock); \
} while (0)
#define read_lock_irqsave(lock, flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
flags = _read_lock_irqsave(lock); \
} while (0)
#define write_lock_irqsave(lock, flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
flags = _write_lock_irqsave(lock); \
} while (0)

#define spin_lock_irqsave(lock, flags) flags = _spin_lock_irqsave(lock)
#define read_lock_irqsave(lock, flags) flags = _read_lock_irqsave(lock)
#define write_lock_irqsave(lock, flags) flags = _write_lock_irqsave(lock)

#ifdef CONFIG_DEBUG_LOCK_ALLOC
#define spin_lock_irqsave_nested(lock, flags, subclass) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
flags = _spin_lock_irqsave_nested(lock, subclass); \
} while (0)
#define spin_lock_irqsave_nested(lock, flags, subclass) \
flags = _spin_lock_irqsave_nested(lock, subclass)
#else
#define spin_lock_irqsave_nested(lock, flags, subclass) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
flags = _spin_lock_irqsave(lock); \
} while (0)
#define spin_lock_irqsave_nested(lock, flags, subclass) \
flags = _spin_lock_irqsave(lock)
#endif

#else
#define spin_lock_irqsave(lock, flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
_spin_lock_irqsave(lock, flags); \
} while (0)
#define read_lock_irqsave(lock, flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
_read_lock_irqsave(lock, flags); \
} while (0)
#define write_lock_irqsave(lock, flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
_write_lock_irqsave(lock, flags); \
} while (0)

#define spin_lock_irqsave(lock, flags) _spin_lock_irqsave(lock, flags)
#define read_lock_irqsave(lock, flags) _read_lock_irqsave(lock, flags)
#define write_lock_irqsave(lock, flags) _write_lock_irqsave(lock, flags)
#define spin_lock_irqsave_nested(lock, flags, subclass) \
spin_lock_irqsave(lock, flags)

Expand Down Expand Up @@ -268,24 +239,15 @@ do { \
#endif

#define spin_unlock_irqrestore(lock, flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
_spin_unlock_irqrestore(lock, flags); \
} while (0)
_spin_unlock_irqrestore(lock, flags)
#define spin_unlock_bh(lock) _spin_unlock_bh(lock)

#define read_unlock_irqrestore(lock, flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
_read_unlock_irqrestore(lock, flags); \
} while (0)
_read_unlock_irqrestore(lock, flags)
#define read_unlock_bh(lock) _read_unlock_bh(lock)

#define write_unlock_irqrestore(lock, flags) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
_write_unlock_irqrestore(lock, flags); \
} while (0)
_write_unlock_irqrestore(lock, flags)
#define write_unlock_bh(lock) _write_unlock_bh(lock)

#define spin_trylock_bh(lock) __cond_lock(lock, _spin_trylock_bh(lock))
Expand All @@ -299,7 +261,6 @@ do { \

#define spin_trylock_irqsave(lock, flags) \
({ \
BUILD_CHECK_IRQ_FLAGS(flags); \
local_irq_save(flags); \
spin_trylock(lock) ? \
1 : ({ local_irq_restore(flags); 0; }); \
Expand Down

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