25 files changed, 70 insertions, 0 deletions
diff --git a/include/asm-alpha/bitops.h b/include/asm-alpha/bitops.h
index 9e71201..ca667d1 100644
--- a/include/asm-alpha/bitops.h
+++ b/include/asm-alpha/bitops.h
@@ -367,6 +367,7 @@ static inline unsigned int hweight8(unsigned int w)
 #else
 #include <asm-generic/bitops/hweight.h>
 #endif
+#include <asm-generic/bitops/lock.h>
 
 #endif /* __KERNEL__ */
 
diff --git a/include/asm-arm/bitops.h b/include/asm-arm/bitops.h
index b41831b6..52fe058 100644
--- a/include/asm-arm/bitops.h
+++ b/include/asm-arm/bitops.h
@@ -286,6 +286,7 @@ static inline int constant_fls(int x)
 
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 /*
  * Ext2 is defined to use little-endian byte ordering.
diff --git a/include/asm-avr32/bitops.h b/include/asm-avr32/bitops.h
index 5299f8c..f3faddf 100644
--- a/include/asm-avr32/bitops.h
+++ b/include/asm-avr32/bitops.h
@@ -288,6 +288,7 @@ static inline int ffs(unsigned long word)
 #include <asm-generic/bitops/fls64.h>
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 #include <asm-generic/bitops/ext2-non-atomic.h>
 #include <asm-generic/bitops/ext2-atomic.h>
diff --git a/include/asm-blackfin/bitops.h b/include/asm-blackfin/bitops.h
index 27c2d0e..03ecedc 100644
--- a/include/asm-blackfin/bitops.h
+++ b/include/asm-blackfin/bitops.h
@@ -199,6 +199,7 @@ static __inline__ int __test_bit(int nr, const void *addr)
 
 #include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 #include <asm-generic/bitops/ext2-atomic.h>
 #include <asm-generic/bitops/ext2-non-atomic.h>
diff --git a/include/asm-cris/bitops.h b/include/asm-cris/bitops.h
index a569065..617151b 100644
--- a/include/asm-cris/bitops.h
+++ b/include/asm-cris/bitops.h
@@ -154,6 +154,7 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
 #include <asm-generic/bitops/fls64.h>
 #include <asm-generic/bitops/hweight.h>
 #include <asm-generic/bitops/find.h>
+#include <asm-generic/bitops/lock.h>
 
 #include <asm-generic/bitops/ext2-non-atomic.h>
 
diff --git a/include/asm-frv/bitops.h b/include/asm-frv/bitops.h
index f8560ed..8dba74b 100644
--- a/include/asm-frv/bitops.h
+++ b/include/asm-frv/bitops.h
@@ -302,6 +302,7 @@ int __ilog2_u64(u64 n)
 
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 #include <asm-generic/bitops/ext2-non-atomic.h>
 
diff --git a/include/asm-generic/bitops.h b/include/asm-generic/bitops.h
index 1f9d991..e022a0f 100644
--- a/include/asm-generic/bitops.h
+++ b/include/asm-generic/bitops.h
@@ -22,6 +22,7 @@
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/ffs.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 #include <asm-generic/bitops/ext2-non-atomic.h>
 #include <asm-generic/bitops/ext2-atomic.h>
diff --git a/include/asm-generic/bitops/lock.h b/include/asm-generic/bitops/lock.h
new file mode 100644
index 0000000..308a9e2
--- /dev/null
+++ b/include/asm-generic/bitops/lock.h
@@ -0,0 +1,45 @@
+#ifndef _ASM_GENERIC_BITOPS_LOCK_H_
+#define _ASM_GENERIC_BITOPS_LOCK_H_
+
+/**
+ * test_and_set_bit_lock - Set a bit and return its old value, for lock
+ * @nr: Bit to set
+ * @addr: Address to count from
+ *
+ * This operation is atomic and provides acquire barrier semantics.
+ * It can be used to implement bit locks.
+ */
+#define test_and_set_bit_lock(nr, addr)	test_and_set_bit(nr, addr)
+
+/**
+ * clear_bit_unlock - Clear a bit in memory, for unlock
+ * @nr: the bit to set
+ * @addr: the address to start counting from
+ *
+ * This operation is atomic and provides release barrier semantics.
+ */
+#define clear_bit_unlock(nr, addr)	\
+do {					\
+	smp_mb__before_clear_bit();	\
+	clear_bit(nr, addr);		\
+} while (0)
+
+/**
+ * __clear_bit_unlock - Clear a bit in memory, for unlock
+ * @nr: the bit to set
+ * @addr: the address to start counting from
+ *
+ * This operation is like clear_bit_unlock, however it is not atomic.
+ * It does provide release barrier semantics so it can be used to unlock
+ * a bit lock, however it would only be used if no other CPU can modify
+ * any bits in the memory until the lock is released (a good example is
+ * if the bit lock itself protects access to the other bits in the word).
+ */
+#define __clear_bit_unlock(nr, addr)	\
+do {					\
+	smp_mb();			\
+	__clear_bit(nr, addr);		\
+} while (0)
+
+#endif /* _ASM_GENERIC_BITOPS_LOCK_H_ */
+
diff --git a/include/asm-h8300/bitops.h b/include/asm-h8300/bitops.h
index d76299c..e64ad31 100644
--- a/include/asm-h8300/bitops.h
+++ b/include/asm-h8300/bitops.h
@@ -194,6 +194,7 @@ static __inline__ unsigned long __ffs(unsigned long word)
 #include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 #include <asm-generic/bitops/ext2-non-atomic.h>
 #include <asm-generic/bitops/ext2-atomic.h>
 #include <asm-generic/bitops/minix.h>
diff --git a/include/asm-ia64/bitops.h b/include/asm-ia64/bitops.h
index 6cc517e..569dd62 100644
--- a/include/asm-ia64/bitops.h
+++ b/include/asm-ia64/bitops.h
@@ -371,6 +371,8 @@ hweight64 (unsigned long x)
 #define hweight16(x)	(unsigned int) hweight64((x) & 0xfffful)
 #define hweight8(x)	(unsigned int) hweight64((x) & 0xfful)
 
+#include <asm-generic/bitops/lock.h>
+
 #endif /* __KERNEL__ */
 
 #include <asm-generic/bitops/find.h>
diff --git a/include/asm-m32r/bitops.h b/include/asm-m32r/bitops.h
index 66ab672..313a02c4 100644
--- a/include/asm-m32r/bitops.h
+++ b/include/asm-m32r/bitops.h
@@ -255,6 +255,7 @@ static __inline__ int test_and_change_bit(int nr, volatile void * addr)
 #include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/ffs.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 #endif /* __KERNEL__ */
 
diff --git a/include/asm-m68k/bitops.h b/include/asm-m68k/bitops.h
index 1a61fdb..da151f7 100644
--- a/include/asm-m68k/bitops.h
+++ b/include/asm-m68k/bitops.h
@@ -314,6 +314,7 @@ static inline int fls(int x)
 #include <asm-generic/bitops/fls64.h>
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 /* Bitmap functions for the minix filesystem */
 
diff --git a/include/asm-m68knommu/bitops.h b/include/asm-m68knommu/bitops.h
index 7d6075d..b8b2770 100644
--- a/include/asm-m68knommu/bitops.h
+++ b/include/asm-m68knommu/bitops.h
@@ -160,6 +160,7 @@ static __inline__ int __test_bit(int nr, const volatile unsigned long * addr)
 
 #include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 static __inline__ int ext2_set_bit(int nr, volatile void * addr)
 {
diff --git a/include/asm-mips/bitops.h b/include/asm-mips/bitops.h
index 899357a..0d3373f 100644
--- a/include/asm-mips/bitops.h
+++ b/include/asm-mips/bitops.h
@@ -556,6 +556,7 @@ static inline int ffs(int word)
 
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 #include <asm-generic/bitops/ext2-non-atomic.h>
 #include <asm-generic/bitops/ext2-atomic.h>
 #include <asm-generic/bitops/minix.h>
diff --git a/include/asm-parisc/bitops.h b/include/asm-parisc/bitops.h
index 015cb0d..03ae287 100644
--- a/include/asm-parisc/bitops.h
+++ b/include/asm-parisc/bitops.h
@@ -208,6 +208,7 @@ static __inline__ int fls(int x)
 
 #include <asm-generic/bitops/fls64.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 #include <asm-generic/bitops/sched.h>
 
 #endif /* __KERNEL__ */
diff --git a/include/asm-powerpc/bitops.h b/include/asm-powerpc/bitops.h
index 8144a27..1d4c166 100644
--- a/include/asm-powerpc/bitops.h
+++ b/include/asm-powerpc/bitops.h
@@ -266,6 +266,7 @@ static __inline__ int fls(unsigned int x)
 #include <asm-generic/bitops/fls64.h>
 
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 #define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0)
 unsigned long find_next_zero_bit(const unsigned long *addr,
diff --git a/include/asm-s390/bitops.h b/include/asm-s390/bitops.h
index f79c9b7..d756b34 100644
--- a/include/asm-s390/bitops.h
+++ b/include/asm-s390/bitops.h
@@ -746,6 +746,7 @@ static inline int sched_find_first_bit(unsigned long *b)
 #include <asm-generic/bitops/fls64.h>
 
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 /*
  * ATTENTION: intel byte ordering convention for ext2 and minix !!
diff --git a/include/asm-sh/bitops.h b/include/asm-sh/bitops.h
index 1c16792..9d70217 100644
--- a/include/asm-sh/bitops.h
+++ b/include/asm-sh/bitops.h
@@ -137,6 +137,7 @@ static inline unsigned long __ffs(unsigned long word)
 #include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/ffs.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/ext2-non-atomic.h>
 #include <asm-generic/bitops/ext2-atomic.h>
diff --git a/include/asm-sh64/bitops.h b/include/asm-sh64/bitops.h
index f3bdcdb..444d5ea 100644
--- a/include/asm-sh64/bitops.h
+++ b/include/asm-sh64/bitops.h
@@ -136,6 +136,7 @@ static __inline__ unsigned long ffz(unsigned long word)
 #include <asm-generic/bitops/__ffs.h>
 #include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/ffs.h>
 #include <asm-generic/bitops/ext2-non-atomic.h>
diff --git a/include/asm-sparc/bitops.h b/include/asm-sparc/bitops.h
index 329e696..00bd0a6 100644
--- a/include/asm-sparc/bitops.h
+++ b/include/asm-sparc/bitops.h
@@ -96,6 +96,7 @@ static inline void change_bit(unsigned long nr, volatile unsigned long *addr)
 #include <asm-generic/bitops/fls.h>
 #include <asm-generic/bitops/fls64.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 #include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/ext2-non-atomic.h>
 #include <asm-generic/bitops/ext2-atomic.h>
diff --git a/include/asm-sparc64/bitops.h b/include/asm-sparc64/bitops.h
index 3d5e1af..dd4bfe9 100644
--- a/include/asm-sparc64/bitops.h
+++ b/include/asm-sparc64/bitops.h
@@ -81,6 +81,7 @@ static inline unsigned int hweight8(unsigned int w)
 #include <asm-generic/bitops/hweight.h>
 
 #endif
+#include <asm-generic/bitops/lock.h>
 #endif /* __KERNEL__ */
 
 #include <asm-generic/bitops/find.h>
diff --git a/include/asm-v850/bitops.h b/include/asm-v850/bitops.h
index 1fa99ba..8eafdb1 100644
--- a/include/asm-v850/bitops.h
+++ b/include/asm-v850/bitops.h
@@ -145,6 +145,7 @@ static inline int __test_bit (int nr, const void *addr)
 #include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 #include <asm-generic/bitops/ext2-non-atomic.h>
 #define ext2_set_bit_atomic(l,n,a)      test_and_set_bit(n,a)
diff --git a/include/asm-x86/bitops_32.h b/include/asm-x86/bitops_32.h
index a20fe98..c96641f 100644
--- a/include/asm-x86/bitops_32.h
+++ b/include/asm-x86/bitops_32.h
@@ -402,6 +402,7 @@ static inline int fls(int x)
 }
 
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 #endif /* __KERNEL__ */
 
diff --git a/include/asm-x86/bitops_64.h b/include/asm-x86/bitops_64.h
index 1d7d9b4..525edf2 100644
--- a/include/asm-x86/bitops_64.h
+++ b/include/asm-x86/bitops_64.h
@@ -408,6 +408,7 @@ static __inline__ int fls(int x)
 #define ARCH_HAS_FAST_MULTIPLIER 1
 
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 #endif /* __KERNEL__ */
 
diff --git a/include/asm-xtensa/bitops.h b/include/asm-xtensa/bitops.h
index 1c1e0d9..78db04c 100644
--- a/include/asm-xtensa/bitops.h
+++ b/include/asm-xtensa/bitops.h
@@ -108,6 +108,7 @@ static inline int fls (unsigned int x)
 #endif
 
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/minix.h>