Re: [PATCH 1/9] kernel: Provide READ_ONCE and ASSIGN_ONCE

[Christian Borntraeger <borntraeger@de.ibm.com>]

Am 05.12.2014 um 03:12 schrieb George Spelvin:
>> +#define READ_ONCE(p) \
>> +	 typeof(p) __val; __read_once_size(&p, &__val, sizeof(__val)); __val; })
>> +
>> +#define ASSIGN_ONCE(val, p) \
>> +	({ typeof(p) __val; __val = val; __assign_once_size(&p, &__val, sizeof(__val)); __val; })
> 
> Minor style nit: is it necessary to name a non-pointer variable "p"?
> I expect typeof(p) to be a pointer type.

v might be better.
> 
> (The other fun style question, which is a lot less minor, is whether
> ASSIGN_ONCE should be (src,dst) as above, or (dst,src) like = and
> <string.h>.)

I tend to prefer dst, src, but Linus used src, dst in his proposal - so I used that.