[PATCH 7/9] powerpc/mm: Wire up ioremap_cache
From: Oliver O'Halloran <oohall@gmail.com>
Date: 2017-04-11 17:43:15
Also in:
nvdimm
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
The default implementation of ioremap_cache() is aliased to ioremap(). On powerpc ioremap() creates cache-inhibited mappings by default which is almost certainly not what you wanted. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> --- arch/powerpc/include/asm/io.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index 5ed292431b5b..839eb031857f 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h@@ -757,6 +757,8 @@ extern void __iomem *ioremap_prot(phys_addr_t address, unsigned long size, extern void __iomem *ioremap_wc(phys_addr_t address, unsigned long size); #define ioremap_nocache(addr, size) ioremap((addr), (size)) #define ioremap_uc(addr, size) ioremap((addr), (size)) +#define ioremap_cache(addr, size) \ + ioremap_prot((addr), (size), pgprot_val(PAGE_KERNEL)) extern void iounmap(volatile void __iomem *addr);
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2.9.3