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[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>
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@ -105,11 +105,11 @@ spufs_mem_mmap_nopage(struct vm_area_struct *vma,
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if (ctx->state == SPU_STATE_SAVED) {
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vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
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& ~(_PAGE_NO_CACHE | _PAGE_GUARDED));
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& ~_PAGE_NO_CACHE);
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page = vmalloc_to_page(ctx->csa.lscsa->ls + offset);
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} else {
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vma->vm_page_prot = __pgprot(pgprot_val(vma->vm_page_prot)
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| _PAGE_NO_CACHE | _PAGE_GUARDED);
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| _PAGE_NO_CACHE);
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page = pfn_to_page((ctx->spu->local_store_phys + offset)
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>> PAGE_SHIFT);
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}
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