Many of the atomic op implementations are the same except for one instruction; fold the lot into a few CPP macros and reduce LoC. This also prepares for easy addition of new ops. Cc: Hirokazu Takata Cc: Linus Torvalds Signed-off-by: Peter Zijlstra --- arch/m32r/include/asm/atomic.h | 151 ++++++++++++++++------------------------- 1 file changed, 61 insertions(+), 90 deletions(-) Index: linux-2.6/arch/m32r/include/asm/atomic.h =================================================================== --- linux-2.6.orig/arch/m32r/include/asm/atomic.h +++ linux-2.6/arch/m32r/include/asm/atomic.h @@ -39,85 +39,64 @@ */ #define atomic_set(v,i) (((v)->counter) = (i)) -/** - * atomic_add_return - add integer to atomic variable and return it - * @i: integer value to add - * @v: pointer of type atomic_t - * - * Atomically adds @i to @v and return (@i + @v). - */ -static __inline__ int atomic_add_return(int i, atomic_t *v) -{ - unsigned long flags; - int result; - - local_irq_save(flags); - __asm__ __volatile__ ( - "# atomic_add_return \n\t" - DCACHE_CLEAR("%0", "r4", "%1") - M32R_LOCK" %0, @%1; \n\t" - "add %0, %2; \n\t" - M32R_UNLOCK" %0, @%1; \n\t" - : "=&r" (result) - : "r" (&v->counter), "r" (i) - : "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r4" -#endif /* CONFIG_CHIP_M32700_TS1 */ - ); - local_irq_restore(flags); - - return result; -} - -/** - * atomic_sub_return - subtract integer from atomic variable and return it - * @i: integer value to subtract - * @v: pointer of type atomic_t - * - * Atomically subtracts @i from @v and return (@v - @i). - */ -static __inline__ int atomic_sub_return(int i, atomic_t *v) -{ - unsigned long flags; - int result; - - local_irq_save(flags); - __asm__ __volatile__ ( - "# atomic_sub_return \n\t" - DCACHE_CLEAR("%0", "r4", "%1") - M32R_LOCK" %0, @%1; \n\t" - "sub %0, %2; \n\t" - M32R_UNLOCK" %0, @%1; \n\t" - : "=&r" (result) - : "r" (&v->counter), "r" (i) - : "memory" #ifdef CONFIG_CHIP_M32700_TS1 - , "r4" -#endif /* CONFIG_CHIP_M32700_TS1 */ - ); - local_irq_restore(flags); - - return result; -} - -/** - * atomic_add - add integer to atomic variable - * @i: integer value to add - * @v: pointer of type atomic_t - * - * Atomically adds @i to @v. - */ -#define atomic_add(i,v) ((void) atomic_add_return((i), (v))) - -/** - * atomic_sub - subtract the atomic variable - * @i: integer value to subtract - * @v: pointer of type atomic_t - * - * Atomically subtracts @i from @v. - */ -#define atomic_sub(i,v) ((void) atomic_sub_return((i), (v))) +#define __ATOMIC_CLOBBER , "r4" +#else +#define __ATOMIC_CLOBBER +#endif + +#define ATOMIC_OP(op) \ +static __inline__ void atomic_##op(int i, atomic_t *v) \ +{ \ + unsigned long flags; \ + int result; \ + \ + local_irq_save(flags); \ + __asm__ __volatile__ ( \ + "# atomic_" #op " \n\t" \ + DCACHE_CLEAR("%0", "r4", "%1") \ + M32R_LOCK" %0, @%1; \n\t" \ + #op " %0, %2; \n\t" \ + M32R_UNLOCK" %0, @%1; \n\t" \ + : "=&r" (result) \ + : "r" (&v->counter), "r" (i) \ + : "memory" \ + __ATOMIC_CLOBBER \ + ); \ + local_irq_restore(flags); \ +} \ + +#define ATOMIC_OP_RETURN(op) \ +static __inline__ int atomic_##op##_return(int i, atomic_t *v) \ +{ \ + unsigned long flags; \ + int result; \ + \ + local_irq_save(flags); \ + __asm__ __volatile__ ( \ + "# atomic_" #op "_return \n\t" \ + DCACHE_CLEAR("%0", "r4", "%1") \ + M32R_LOCK" %0, @%1; \n\t" \ + #op " %0, %2; \n\t" \ + M32R_UNLOCK" %0, @%1; \n\t" \ + : "=&r" (result) \ + : "r" (&v->counter), "r" (i) \ + : "memory" \ + __ATOMIC_CLOBBER \ + ); \ + local_irq_restore(flags); \ + \ + return result; \ +} + +#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) + +ATOMIC_OPS(add) +ATOMIC_OPS(sub) + +#undef ATOMIC_OPS +#undef ATOMIC_OP_RETURN +#undef ATOMIC_OP /** * atomic_sub_and_test - subtract value from variable and test result @@ -151,9 +130,7 @@ static __inline__ int atomic_inc_return( : "=&r" (result) : "r" (&v->counter) : "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r4" -#endif /* CONFIG_CHIP_M32700_TS1 */ + __ATOMIC_CLOBBER ); local_irq_restore(flags); @@ -181,9 +158,7 @@ static __inline__ int atomic_dec_return( : "=&r" (result) : "r" (&v->counter) : "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r4" -#endif /* CONFIG_CHIP_M32700_TS1 */ + __ATOMIC_CLOBBER ); local_irq_restore(flags); @@ -280,9 +255,7 @@ static __inline__ void atomic_clear_mask : "=&r" (tmp) : "r" (addr), "r" (~mask) : "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r5" -#endif /* CONFIG_CHIP_M32700_TS1 */ + __ATOMIC_CLOBBER ); local_irq_restore(flags); } @@ -302,9 +275,7 @@ static __inline__ void atomic_set_mask(u : "=&r" (tmp) : "r" (addr), "r" (mask) : "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r5" -#endif /* CONFIG_CHIP_M32700_TS1 */ + __ATOMIC_CLOBBER ); local_irq_restore(flags); }