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Don't use cpuid.2 to determine cache info if cpuid.4 is supported. The exception is P4 trace cache. We always use cpuid.2 to get trace cache under P4. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>