From 932f535dd4c83dc3eb631c2cee1dfd6ae289b88c Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Mon, 20 Nov 2006 18:45:06 +0100
Subject: [PATCH] [POWERPC] spufs: Always map local store non-guarded
When fixing spufs to map the 'mem' file backing store cacheable,
I incorrectly set the physical mapping to use both cache-inhibited
and guarded mapping, which resulted in a serious performance
degradation.
Debugged-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
arch/powerpc/platforms/cell/spufs/file.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index 55d7e0f4bb3b8..1c1af71d19cb2 100644
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -105,11 +105,11 @@ spufs_mem_mmap_nopage(struct vm_area_struct *vma,
if (ctx->state == SPU_STATE_SAVED) {
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
- & ~(_PAGE_NO_CACHE | _PAGE_GUARDED));
+ & ~_PAGE_NO_CACHE);
page = vmalloc_to_page(ctx->csa.lscsa->ls + offset);
} else {
vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
- | _PAGE_NO_CACHE | _PAGE_GUARDED);
+ | _PAGE_NO_CACHE);
page = pfn_to_page((ctx->spu->local_store_phys + offset)
>> PAGE_SHIFT);
}
--
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