[lkml]   [2007]   [Oct]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 2/2] powerpc: Switch to generic WARN_ON()/BUG_ON()
On Fri, Oct 12, 2007 at 11:23:39AM +1000, Paul Mackerras wrote:
> Olof Johansson writes:
> > Not using the ppc-specific WARN_ON/BUG_ON constructs actually saves about
> > 4K text on a ppc64_defconfig. The main reason seems to be that prepping
> > the arguments to the conditional trap instructions is more work than
> > just doing a compare and branch.
> It might be more instructions but it takes fewer cycles, I would
> expect. Do you have the actual instruction sequences to compare?

I really hope WARN_ON/BUG_ON aren't hotpaths on powerpc. ;-)

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2007-10-12 04:07    [W:0.077 / U:0.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site