All architecture specific rwsem headers carry the same function prototypes. Just x86 adds asmregparm, which is an empty define on all other architectures. S390 has a stale rwsem_downgrade_write() prototype. Remove the duplicates and add the prototypes to linux/rwsem.h Signed-off-by: Thomas Gleixner --- arch/alpha/include/asm/rwsem.h | 5 ----- arch/ia64/include/asm/rwsem.h | 5 ----- arch/powerpc/include/asm/rwsem.h | 5 ----- arch/s390/include/asm/rwsem.h | 6 ------ arch/sh/include/asm/rwsem.h | 5 ----- arch/sparc/include/asm/rwsem.h | 5 ----- arch/x86/include/asm/rwsem.h | 9 --------- arch/xtensa/include/asm/rwsem.h | 5 ----- include/linux/rwsem.h | 5 +++++ 9 files changed, 5 insertions(+), 45 deletions(-) Index: linux-2.6/arch/alpha/include/asm/rwsem.h =================================================================== --- linux-2.6.orig/arch/alpha/include/asm/rwsem.h +++ linux-2.6/arch/alpha/include/asm/rwsem.h @@ -14,11 +14,6 @@ #include -extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *); -extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem); - #define RWSEM_UNLOCKED_VALUE 0x0000000000000000L #define RWSEM_ACTIVE_BIAS 0x0000000000000001L #define RWSEM_ACTIVE_MASK 0x00000000ffffffffL Index: linux-2.6/arch/ia64/include/asm/rwsem.h =================================================================== --- linux-2.6.orig/arch/ia64/include/asm/rwsem.h +++ linux-2.6/arch/ia64/include/asm/rwsem.h @@ -34,11 +34,6 @@ #define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS #define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS) -extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem); - /* * lock for reading */ Index: linux-2.6/arch/powerpc/include/asm/rwsem.h =================================================================== --- linux-2.6.orig/arch/powerpc/include/asm/rwsem.h +++ linux-2.6/arch/powerpc/include/asm/rwsem.h @@ -28,11 +28,6 @@ #define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS #define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS) -extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem); - /* * lock for reading */ Index: linux-2.6/arch/s390/include/asm/rwsem.h =================================================================== --- linux-2.6.orig/arch/s390/include/asm/rwsem.h +++ linux-2.6/arch/s390/include/asm/rwsem.h @@ -43,12 +43,6 @@ #ifdef __KERNEL__ -extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *); -extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *); -extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *); -extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *); -extern struct rw_semaphore *rwsem_downgrade_write(struct rw_semaphore *); - #ifndef __s390x__ #define RWSEM_UNLOCKED_VALUE 0x00000000 #define RWSEM_ACTIVE_BIAS 0x00000001 Index: linux-2.6/arch/sh/include/asm/rwsem.h =================================================================== --- linux-2.6.orig/arch/sh/include/asm/rwsem.h +++ linux-2.6/arch/sh/include/asm/rwsem.h @@ -19,11 +19,6 @@ #define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS #define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS) -extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem); - /* * lock for reading */ Index: linux-2.6/arch/sparc/include/asm/rwsem.h =================================================================== --- linux-2.6.orig/arch/sparc/include/asm/rwsem.h +++ linux-2.6/arch/sparc/include/asm/rwsem.h @@ -20,11 +20,6 @@ #define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS #define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS) -extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem); - /* * lock for reading */ Index: linux-2.6/arch/x86/include/asm/rwsem.h =================================================================== --- linux-2.6.orig/arch/x86/include/asm/rwsem.h +++ linux-2.6/arch/x86/include/asm/rwsem.h @@ -39,15 +39,6 @@ #ifdef __KERNEL__ #include -extern asmregparm struct rw_semaphore * - rwsem_down_read_failed(struct rw_semaphore *sem); -extern asmregparm struct rw_semaphore * - rwsem_down_write_failed(struct rw_semaphore *sem); -extern asmregparm struct rw_semaphore * - rwsem_wake(struct rw_semaphore *); -extern asmregparm struct rw_semaphore * - rwsem_downgrade_wake(struct rw_semaphore *sem); - /* * The bias values and the counter type limits the number of * potential readers/writers to 32767 for 32 bits and 2147483647 Index: linux-2.6/arch/xtensa/include/asm/rwsem.h =================================================================== --- linux-2.6.orig/arch/xtensa/include/asm/rwsem.h +++ linux-2.6/arch/xtensa/include/asm/rwsem.h @@ -24,11 +24,6 @@ #define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS #define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS) -extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *sem); -extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem); - /* * lock for reading */ Index: linux-2.6/include/linux/rwsem.h =================================================================== --- linux-2.6.orig/include/linux/rwsem.h +++ linux-2.6/include/linux/rwsem.h @@ -32,6 +32,11 @@ struct rw_semaphore { #endif }; +extern asmregparm struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *sem); +extern asmregparm struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem); +extern asmregparm struct rw_semaphore *rwsem_wake(struct rw_semaphore *); +extern asmregparm struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem); + /* Include the arch specific part */ #include