From mboxrd@z Thu Jan 1 00:00:00 1970 From: david.woodhouse@intel.com (Woodhouse, David) Date: Fri, 1 Feb 2013 07:33:17 +0000 Subject: [RFC] arm: use built-in byte swap function In-Reply-To: <20130201011712.GF23505@n2100.arm.linux.org.uk> References: <20130128193033.8a0b0a871150c99247f05a95@freescale.com> <20130129083522.GA14302@pd.tnic> <1359478014.3529.157.camel@shinybook.infradead.org> <20130129174249.GB25415@pd.tnic> <1359482147.3529.161.camel@shinybook.infradead.org> <20130129181046.GC25415@pd.tnic> <1359541333.3529.186.camel@shinybook.infradead.org> <20130130200900.9d7cf7908caeaef4ecee1d61@freescale.com> <20130131092801.GV23505@n2100.arm.linux.org.uk> <20130131145947.f62474a0600848df86548b96@freescale.com> <20130201011712.GF23505@n2100.arm.linux.org.uk> Message-ID: <1359703995.23531.6.camel@shinybook.infradead.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, 2013-02-01 at 01:17 +0000, Russell King - ARM Linux wrote: > > > I've tried both gcc 4.6.3 [1] and 4.6.4 [2]. If you can point me to > > a 4.5.x, I'll try that, too, but as it stands now, if one moves the > > code added to swab.h below outside of its armv6 protection, > > gcc adds calls to __bswapsi2. > > Take a look at the message I sent on the 29th towards the beginning of > this thread for details of gcc 4.5.4 behaviour. I'd like to see a comment (with PR# if appropriate) explaining clearly *why* it isn't enabled for