From: Nick Spence <[EMAIL PROTECTED]>
This patch re-introduces the O_SYNC flag to make DRAM non-cached, which is the
default behavior
for non PowerPC architectures in /drivers/char/mem.c
Signed-off-by: Nick Spence <[EMAIL PROTECTED]>
---
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 5ccb579..f994b0a 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -101,7 +101,7 @@ pgprot_t phys_mem_access_prot(struct file *file, unsigned
long pfn,
if (ppc_md.phys_mem_access_prot)
return ppc_md.phys_mem_access_prot(file, pfn, size, vma_prot);
- if (!page_is_ram(pfn))
+ if ((file->f_flags & O_SYNC) || (!page_is_ram(pfn)))
vma_prot = __pgprot(pgprot_val(vma_prot)
| _PAGE_GUARDED | _PAGE_NO_CACHE);
return vma_prot;
--
1.5.5
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