Re: [PATCH] Replace __attribute_pure__ with __pure

[Kyle Moffett <mrmacman_g4@mac.com>]

Trimmed the CC list a bit

On Oct 05, 2007, at 20:51:21, H. Peter Anvin wrote:
> Ralf Baechle wrote:
>> To be consistent with the use of attributes in the rest of the  
>> kernel replace all use of __attribute_pure__ with __pure and  
>> delete the definition of __attribute_pure__.
>
> Concern: __attribute_pure__ is very similar to __attribute_const__,  
> which is almost completely, but not totally unlike the keyword  
> "const"...

Yes, there's also the fact that __pure is a reserved GCC keyword.   
Essentially according to GCC docs all of the GCC-specific keywords  
are equivalently defined as "keyword", "__keyword", and  
"__keyword__", with only the latter two defined in strict-ANSI mode.   
The following is valid according to GCC docs:

static int __attribute__((__pure)) my_strlen(const char *str);

With the proposed definition of __pure, that becomes a noticeably  
invalid __attribute__((__attribute__((__pure__))))


Cheers,
Kyle Moffett