On 10/12/2013 12:55 AM, Will Deacon wrote:
> On Fri, Oct 11, 2013 at 12:47:05PM +0100, Chen Gang wrote:
>> In current kernel wide source code, except other architectures, only
>> s390 scsi drivers use atomic_clear_mask(), and arm/arm64 need not
>> support s390 drivers.
>>
>> So remove atomic_clear_mask() from "arm[64]/include/asm/atomic.h".
>
> Acked-by: Will Deacon <will.dea...@arm.com>
>
Thank you for your whole work.
> Catalin, are you happy for me to send this via the ARM tree?
>
> Will
>
Thanks.
--
Chen Gang
>>
>> Signed-off-by: Chen Gang <gang.c...@asianux.com>
>> ---
>> arch/arm/include/asm/atomic.h | 24 ------------------------
>> arch/arm64/include/asm/atomic.h | 14 --------------
>> 2 files changed, 0 insertions(+), 38 deletions(-)
>>
>> diff --git a/arch/arm/include/asm/atomic.h b/arch/arm/include/asm/atomic.h
>> index da1c77d..3b3ae49fa 100644
>> --- a/arch/arm/include/asm/atomic.h
>> +++ b/arch/arm/include/asm/atomic.h
>> @@ -134,21 +134,6 @@ static inline int atomic_cmpxchg(atomic_t *ptr, int
>> old, int new)
>> return oldval;
>> }
>>
>> -static inline void atomic_clear_mask(unsigned long mask, unsigned long
>> *addr)
>> -{
>> - unsigned long tmp, tmp2;
>> -
>> - __asm__ __volatile__("@ atomic_clear_mask\n"
>> -"1: ldrex %0, [%3]\n"
>> -" bic %0, %0, %4\n"
>> -" strex %1, %0, [%3]\n"
>> -" teq %1, #0\n"
>> -" bne 1b"
>> - : "=&r" (tmp), "=&r" (tmp2), "+Qo" (*addr)
>> - : "r" (addr), "Ir" (mask)
>> - : "cc");
>> -}
>> -
>> #else /* ARM_ARCH_6 */
>>
>> #ifdef CONFIG_SMP
>> @@ -197,15 +182,6 @@ static inline int atomic_cmpxchg(atomic_t *v, int old,
>> int new)
>> return ret;
>> }
>>
>> -static inline void atomic_clear_mask(unsigned long mask, unsigned long
>> *addr)
>> -{
>> - unsigned long flags;
>> -
>> - raw_local_irq_save(flags);
>> - *addr &= ~mask;
>> - raw_local_irq_restore(flags);
>> -}
>> -
>> #endif /* __LINUX_ARM_ARCH__ */
>>
>> #define atomic_xchg(v, new) (xchg(&((v)->counter), new))
>> diff --git a/arch/arm64/include/asm/atomic.h
>> b/arch/arm64/include/asm/atomic.h
>> index 8363644..01de5aa 100644
>> --- a/arch/arm64/include/asm/atomic.h
>> +++ b/arch/arm64/include/asm/atomic.h
>> @@ -126,20 +126,6 @@ static inline int atomic_cmpxchg(atomic_t *ptr, int
>> old, int new)
>> return oldval;
>> }
>>
>> -static inline void atomic_clear_mask(unsigned long mask, unsigned long
>> *addr)
>> -{
>> - unsigned long tmp, tmp2;
>> -
>> - asm volatile("// atomic_clear_mask\n"
>> -"1: ldxr %0, %2\n"
>> -" bic %0, %0, %3\n"
>> -" stxr %w1, %0, %2\n"
>> -" cbnz %w1, 1b"
>> - : "=&r" (tmp), "=&r" (tmp2), "+Q" (*addr)
>> - : "Ir" (mask)
>> - : "cc");
>> -}
>> -
>> #define atomic_xchg(v, new) (xchg(&((v)->counter), new))
>>
>> static inline int __atomic_add_unless(atomic_t *v, int a, int u)
>> --
>> 1.7.7.6
>>
>
>
--
Chen Gang
--
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