From 245067d1674d451855692fcd4647daf9fd47f82d Mon Sep 17 00:00:00 2001 From: Zachary Amsden Date: Sat, 3 Sep 2005 15:56:37 -0700 Subject: [PATCH] i386: cleanup serialize msr i386 arch cleanup. Introduce the serialize macro to serialize processor state. Why the microcode update needs it I am not quite sure, since wrmsr() is already a serializing instruction, but it is a microcode update, so I will keep the semantic the same, since this could be a timing workaround. As far as I can tell, this has always been there since the original microcode update source. Signed-off-by: Zachary Amsden Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-i386/processor.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/asm-i386') diff --git a/include/asm-i386/processor.h b/include/asm-i386/processor.h index 7e17d3b4f65..a0489b22270 100644 --- a/include/asm-i386/processor.h +++ b/include/asm-i386/processor.h @@ -277,6 +277,11 @@ static inline void clear_in_cr4 (unsigned long mask) outb((data), 0x23); \ } while (0) +static inline void serialize_cpu(void) +{ + __asm__ __volatile__ ("cpuid" : : : "ax", "bx", "cx", "dx"); +} + static inline void __monitor(const void *eax, unsigned long ecx, unsigned long edx) { -- cgit v1.2.3