[U-Boot] [PATCH V4 1/4] ARM: Define change_bit routine

[Amit Virdi <amit.virdi@st.com>]

>>
>>   extern void clear_bit(int nr, volatile void * addr);
>>
>> -extern void change_bit(int nr, volatile void * addr);
>> -
>>   static inline void __change_bit(int nr, volatile void *addr)
>>   {
>>   	unsigned long mask = BIT_MASK(nr);
>> @@ -39,6 +37,11 @@ static inline void __change_bit(int nr, volatile void *addr)
>>   	*p ^= mask;
>>   }
>>
>> +static inline void change_bit(int nr, volatile void *addr)
>> +{
>> +	__change_bit(nr, addr);
>> +}
>> +
>>   static inline int __test_and_set_bit(int nr, volatile void *addr)
>>   {
>>   	unsigned long mask = BIT_MASK(nr);
>
> While they're not used much, U-Boot does have interrupt support (at
> least on powerpc -- not sure about ARM), so this should be atomic
> against interrupts.
>
> The NAND driver should be using __change_bit() instead.
>

Alright, I shall be soon sending V5 that drops this patch and uses 
__change_bit directly.

Thanks
Amit Virdi