From: Andi Kleen Date: Wed, 30 Jan 2008 12:32:37 +0000 (+0100) Subject: x86: Implement support to synchronize RDTSC with LFENCE on Intel CPUs X-Git-Tag: v2.6.25-rc1~1143^2~427 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=707fa8ed923b1b6a3d7af0d386b0b3abad28ed19;p=pandora-kernel.git x86: Implement support to synchronize RDTSC with LFENCE on Intel CPUs According to Intel RDTSC can be always synchronized with LFENCE on all current CPUs. Implement the necessary CPUID bit for that. It is unclear yet if that is true for all future CPUs too, but if there's another way the kernel can be always updated. Cc: asit.k.mallick@intel.com Signed-off-by: Andi Kleen Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- Reading git-diff-tree failed