Re: [PATCH v2 22/25] powerpc32: move xxxxx_dcache_range() functions inline

From: Christophe Leroy
Date: Tue Sep 22 2015 - 18:49:51 EST




Le 23/09/2015 00:34, Scott Wood a Ãcrit :
On Tue, 2015-09-22 at 22:57 +0200, Christophe Leroy wrote:
>Here is what I get in asm. First one is with "if (i) mb();". We see gcc
>puts a beqlr. This is the form that is closest to what we had in the
>former misc_32.S
>Second one if with "mb()". Here we get a branch to sync for a useless sync
I was more concerned with keeping the code simple than the asm output.

Right, but is that so complicated to say: if we did nothing in the loop, no need to sync ?

Christophe
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