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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>