[PATCHv2] remove unnecessary cache flush on v6 copypage

I just resubmitted the patch to the patch system (6995/2).

Thank you for your patience.

On Fri, Jul 8, 2011 at 2:35 AM, Russell King - ARM Linux
[off-list ref] wrote:

On Thu, Jul 07, 2011 at 09:30:19AM -0500, Heechul Yun wrote:

quoted

ARM: mm: remove unnecessary cache flush on v6 copypage

Originally introduced to maintain coherency between icache and dcache
in v6 nonaliasing mode. This is now handled by __sync_icache_dcache since
c0177800, therefore unneceary in this function.

Signed-off-by: Heechul Yun <redacted>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
--
arch/arm/mm/copypage-v6.c | ? ?1 -
?1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mm/copypage-v6.c b/arch/arm/mm/copypage-v6.c
index bdba6c6..63cca00 100644
--- a/arch/arm/mm/copypage-v6.c
+++ b/arch/arm/mm/copypage-v6.c

@@ -41,7 +41,6 @@ static void v6_copy_user_highpage_nonaliasing(struct page *to,

? ? ? kfrom = kmap_atomic(from, KM_USER0);
? ? ? kto = kmap_atomic(to, KM_USER1);
? ? ? copy_page(kto, kfrom);
- ? ? __cpuc_flush_dcache_area(kto, PAGE_SIZE);
? ? ? kunmap_atomic(kto, KM_USER1);
? ? ? kunmap_atomic(kfrom, KM_USER0);
?}

The above patch is fine (it has tabs preserved) but the version in the
patch system has spaces instead (each space character has been replaced
with a '.') and so doesn't apply:

$ pdb getpatch 6995/1 |tr ' ' '.'
Patch:.6995/1:.mm:.remove.unnecessary.cache.flush.on.v6.copypage
From:.Heechul.Yun
-------------------------------------------------------------------------------
.arch/arm/mm/copypage-v6.c.|....1.-
.1.file.changed,.1.deletion(-)
-------------------------------------------------------------------------------
diff.--git.a/arch/arm/mm/copypage-v6.c.b/arch/arm/mm/copypage-v6.c
index.bdba6c6..63cca00.100644
---.a/arch/arm/mm/copypage-v6.c
+++.b/arch/arm/mm/copypage-v6.c
@@.-41,7.+41,6.@@.static.void.v6_copy_user_highpage_nonaliasing(struct.page.*to,........kfrom.=.kmap_atomic(from,.KM_USER0);
........kto.=.kmap_atomic(to,.KM_USER1);
........copy_page(kto,.kfrom);
-.......__cpuc_flush_dcache_area(kto,.PAGE_SIZE);
........kunmap_atomic(kto,.KM_USER1);
........kunmap_atomic(kfrom,.KM_USER0);
.}