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

Le 23/09/2015 00:34, Scott Wood a écrit :

On Tue, 2015-09-22 at 22:57 +0200, Christophe Leroy wrote:

quoted

quoted

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