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-rw-r--r--include/linux/irqflags.h37
-rw-r--r--include/linux/spinlock.h53
2 files changed, 76 insertions, 14 deletions
diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h
index 412e025bc5c7..4fe740bf4eae 100644
--- a/include/linux/irqflags.h
+++ b/include/linux/irqflags.h
@@ -11,6 +11,12 @@
#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);
@@ -50,10 +56,15 @@
#define local_irq_disable() \
do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0)
#define local_irq_save(flags) \
- do { raw_local_irq_save(flags); trace_hardirqs_off(); } while (0)
+ do { \
+ BUILD_CHECK_IRQ_FLAGS(flags); \
+ 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(); \
@@ -69,8 +80,16 @@
*/
# define raw_local_irq_disable() local_irq_disable()
# define raw_local_irq_enable() local_irq_enable()
-# define raw_local_irq_save(flags) local_irq_save(flags)
-# define raw_local_irq_restore(flags) local_irq_restore(flags)
+# 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)
#endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */
#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
@@ -80,7 +99,11 @@
raw_safe_halt(); \
} while (0)
-#define local_save_flags(flags) raw_local_save_flags(flags)
+#define local_save_flags(flags) \
+ do { \
+ BUILD_CHECK_IRQ_FLAGS(flags); \
+ raw_local_save_flags(flags); \
+ } while (0)
#define irqs_disabled() \
({ \
@@ -90,7 +113,11 @@
raw_irqs_disabled_flags(flags); \
})
-#define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags)
+#define irqs_disabled_flags(flags) \
+({ \
+ BUILD_CHECK_IRQ_FLAGS(flags); \
+ raw_irqs_disabled_flags(flags); \
+})
#endif /* CONFIG_X86 */
#endif
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index b800d2d68b32..54ad37089c49 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -52,6 +52,7 @@
#include <linux/thread_info.h>
#include <linux/kernel.h>
#include <linux/stringify.h>
+#include <linux/irqflags.h>
#include <asm/system.h>
@@ -183,13 +184,37 @@ do { \
#define read_lock(lock) _read_lock(lock)
#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
-#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)
+#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)
#else
-#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(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)
#endif
#define spin_lock_irq(lock) _spin_lock_irq(lock)
@@ -225,15 +250,24 @@ do { \
#endif
#define spin_unlock_irqrestore(lock, flags) \
- _spin_unlock_irqrestore(lock, flags)
+ do { \
+ BUILD_CHECK_IRQ_FLAGS(flags); \
+ _spin_unlock_irqrestore(lock, flags); \
+ } while (0)
#define spin_unlock_bh(lock) _spin_unlock_bh(lock)
#define read_unlock_irqrestore(lock, flags) \
- _read_unlock_irqrestore(lock, flags)
+ do { \
+ BUILD_CHECK_IRQ_FLAGS(flags); \
+ _read_unlock_irqrestore(lock, flags); \
+ } while (0)
#define read_unlock_bh(lock) _read_unlock_bh(lock)
#define write_unlock_irqrestore(lock, flags) \
- _write_unlock_irqrestore(lock, flags)
+ do { \
+ BUILD_CHECK_IRQ_FLAGS(flags); \
+ _write_unlock_irqrestore(lock, flags); \
+ } while (0)
#define write_unlock_bh(lock) _write_unlock_bh(lock)
#define spin_trylock_bh(lock) __cond_lock(lock, _spin_trylock_bh(lock))
@@ -247,6 +281,7 @@ 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; }); \