Commit d9fadd7b authored Sep 02, 2010 by Andreas Herrmann Committed by Ingo Molnar Sep 05, 2010

x86, AMD: Remove needless CPU family check (for L3 cache info)



Old 32-bit AMD CPUs (all w/o L3 cache) should always return 0
for cpuid_edx(0x80000006).

For unknown reason the 32-bit implementation differed from the
64-bit implementation. See commit 67cddd94 ("i386: Add L3 cache
support to AMD CPUID4 emulation"). The current check is the
result of the x86 merge.

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Andi Kleen <andi@firstfloor.org>
LKML-Reference: <20100902133710.GA5449@loge.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent acf01734

arch/x86/kernel/cpu/amd.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -540,7 +540,7 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
		#endif

		if (c->extended_cpuid_level >= 0x80000006) {
		if ((c->x86 >= 0x0f) && (cpuid_edx(0x80000006) & 0xf000))
		if (cpuid_edx(0x80000006) & 0xf000)
		num_cache_leaves = 4;
		else
		num_cache_leaves = 3;