Messages in this thread | | | Subject | Re: [PATCH] 6fire: Convert byte_rev_table uses to bitrev8 | From | Joe Perches <> | Date | Tue, 28 Oct 2014 20:06:14 -0700 |
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On Wed, 2014-10-29 at 10:42 +0800, Wang, Yalin wrote: > > Use the inline function instead of directly indexing the array. > > This allows some architectures with hardware instructions for bit reversals > > to eliminate the array. [] > > On Sun, 2014-10-26 at 23:46 -0700, Joe Perches wrote: > > > On Mon, 2014-10-27 at 14:37 +0800, Wang, Yalin wrote: > > > > this change add CONFIG_HAVE_ARCH_BITREVERSE config option, so that > > > > we can use arm/arm64 rbit instruction to do bitrev operation by > > > > hardware. [] > I think the most safe way is change byte_rev_table[] to be satic, > So that no driver can access it directly, > The build error can remind the developer if they use byte_rev_table[] > Directly .
You can do that with your later patch, but the existing uses _must_ be converted first so you don't break the build.
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