On Wed, 2010-02-03 at 07:42 -0800, Andrew Morton wrote: > On Wed, 03 Feb 2010 16:15:57 +0100 Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > > On Wed, 2010-02-03 at 07:08 -0800, Andrew Morton wrote: > > > On Wed, 3 Feb 2010 21:39:51 +0800 Wu Fengguang <fengguang.wu@xxxxxxxxx> wrote: > > > > > > > Is there an official lowest GCC version that Linux supports? > > > > > > Documentation/Changes says gcc-3.2. > > > > Anyway, its not like that macro I used isn't straight forward. Not much > > a builtin can do better. > > > > The only benefit the builtin has is possibly use machine popcnt > > instructions but we already deal with that in the kernel. > > We didn't deal with it on every architecture, which is something which > the compiler extension takes care of. > > In fact I can't find anywhere where we dealt with it on x86. >From what I know the popcnt ins on x86 is relatively new, hpa was going to look at supporting it using alternatives. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
