Messages in this thread | | | From | Michael Ellerman <> | Subject | Re: [v4,2/2] powerpc32: memset: only use dcbz once cache is enabled | Date | Thu, 17 Sep 2015 15:13:27 +1000 (AEST) |
| |
On Wed, 2015-16-09 at 10:04:53 UTC, LEROY Christophe wrote: > memset() uses instruction dcbz to speed up clearing by not wasting time > loading cache line with data that will be overwritten. > Some platform like mpc52xx do no have cache active at startup and > can therefore not use memset(). Allthough no part of the code > explicitly uses memset(), GCC may make calls to it. > > This patch modifies memset() such that at startup, memset() > unconditionally skip the optimised bloc that uses dcbz instruction. > > Once the initial MMU is set up, in machine_init() we patch memset() > by replacing this inconditional jump by a NOP > > Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Applied to powerpc fixes, thanks.
https://git.kernel.org/powerpc/c/400c47d81ca383fc87d5a393
cheers
| |