[lkml]   [2013]   [Oct]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH for 3.12] mutex: Avoid gcc version dependent __builtin_constant_p() usage.
On Thu, Oct 17, 2013 at 07:45:29PM +0900, Tetsuo Handa wrote:
> Commit 040a0a37 "mutex: Add support for wound/wait style locks" used
> "!__builtin_constant_p(p == NULL)" but gcc 3.x cannot handle such expression
> correctly, leading to boot failure when built with CONFIG_DEBUG_MUTEXES=y.

So I completely forgot all about this, but wouldn't something like:

!(__builtin_constant_p(p) && p == NULL)

Not also work and generate the same code?

 \ /
  Last update: 2013-10-17 13:01    [W:0.055 / U:11.080 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site