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In-Reply-To: <20170523234559.28080-1-matthew.brown.dev@gmail.com>
To: Matt Brown <matthew.brown.dev@gmail.com>, linuxppc-dev@lists.ozlabs.org
From: Michael Ellerman <patch-notifications@ellerman.id.au>
Cc: anton@samba.org
Subject: Re: powerpc/lib: Split xor_vmx file to guarantee instruction ordering
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Date: Mon,  5 Jun 2017 20:21:51 +1000 (AEST)
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On Tue, 2017-05-23 at 23:45:59 UTC, Matt Brown wrote:
> The xor_vmx.c file is used for the RAID5 xor operations. In these functions
> altivec is enabled to run the operation and then disabled. However due to
> compiler instruction reordering, altivec instructions are being run before
> enable_altivec() and after disable_altivec().
> 
> This patch splits the non-altivec code into xor_vmx_glue.c which calls the
> altivec functions in xor_vmx.c. By compiling xor_vmx_glue.c without
> -maltivec we can guarantee that altivec instruction will not be reordered
> outside of the enable/disable block.
> 
> Signed-off-by: Matt Brown <matthew.brown.dev@gmail.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/f718d426d7e42eec6e5d2932f52a51

cheers