x86/asm/tsc: Add rdtsc_ordered() and use it in trivial call sites
authorAndy Lutomirski <luto@kernel.org>
Thu, 25 Jun 2015 16:44:08 +0000 (18:44 +0200)
committerIngo Molnar <mingo@kernel.org>
Mon, 6 Jul 2015 13:23:29 +0000 (15:23 +0200)
commit03b9730b769fc4d87e40f6104f4c5b2e43889f19
treea3f46bac8fc6ee76933f5f17c2d9f30059957529
parent4ea1636b04dbd66536fa387bae2eea463efc705b
x86/asm/tsc: Add rdtsc_ordered() and use it in trivial call sites

rdtsc_barrier(); rdtsc() is an unnecessary mouthful and requires
more thought than should be necessary. Add an rdtsc_ordered()
helper and replace the trivial call sites with it.

This should not change generated code. The duplication of the
fence asm is temporary.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang Rui <ray.huang@amd.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm ML <kvm@vger.kernel.org>
Link: http://lkml.kernel.org/r/dddbf98a2af53312e9aa73a5a2b1622fe5d6f52b.1434501121.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/entry/vdso/vclock_gettime.c
arch/x86/include/asm/msr.h
arch/x86/kernel/trace_clock.c
arch/x86/kvm/x86.c
arch/x86/lib/delay.c