Revert "[PATCH] Enforce "unsigned long flags;" when spinlocking"

This reverts commit ee3ce191e8eaa4cc15c51a28b34143b36404c4f5, 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>

1 files changed, 15 insertions, 54 deletions

diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index 57f670d..8451052 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -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>
 
@@ -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)
 
@@ -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))
@@ -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; }); \