From mboxrd@z Thu Jan 1 00:00:00 1970 From: linux@arm.linux.org.uk (Russell King - ARM Linux) Date: Wed, 30 Oct 2013 16:01:33 +0000 Subject: [GIT PULL] prefetch support for 3.13 In-Reply-To: References: <20131009171312.GJ8378@mudshark.cambridge.arm.com> <527124B3.9090305@nvidia.com> <20131030152553.GD16735@n2100.arm.linux.org.uk> Message-ID: <20131030160133.GE16735@n2100.arm.linux.org.uk> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Wed, Oct 30, 2013 at 08:53:08AM -0700, Paul Walmsley wrote: > Hi Russell, > > On Wed, 30 Oct 2013, Russell King - ARM Linux wrote: > >> On Wed, Oct 30, 2013 at 08:24:35AM -0700, Paul Walmsley wrote: >>> Hi Will et al., >>> >>> On 10/09/2013 10:13 AM, Will Deacon wrote: >>>> Hi Russell, >>>> >>>> Please pull the following patches for 3.13. They add support for the pldw >>>> instruction (prefetch with intent to modify) in ARMv7 SMP cores, which is >>>> then used to gain a measurable performance boost for particular atomic >>>> sequences. >>> >>> Looks like the pldw changes require binutils >= 2.21. Might be worth >>> considering a patch to update Documentation/Changes? >> >> Not really - because that says "for all architectures the minimum >> requirement is now 2.21 or later" and that's certainly not the case. >> >> It's only ARMv7 which requires this. > > Would you consider something like the following? I think it's up to others whether we want to start adding this level of detail to this file. Given that we already have x86 there, I don't see a problem with this. Acked-by: Russell King