From 487472bc01fab0625996aad37836aad931e4eda9 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Wed, 11 Jan 2006 22:45:27 +0100 Subject: [PATCH] i386: Replace broken serialize_cpu in microcode driver with correct sync_core Passing random input values in eax to cpuid is not a good idea because the CPU will GPF for unknown ones. Use the correct x86-64 version that exists for a longer time too. This also adds a memory barrier to prevent the optimizer from reordering. Cc: tigran@veritas.com Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds --- arch/i386/kernel/microcode.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/i386') diff --git a/arch/i386/kernel/microcode.c b/arch/i386/kernel/microcode.c index fad3037ebae..d3fdf0057d8 100644 --- a/arch/i386/kernel/microcode.c +++ b/arch/i386/kernel/microcode.c @@ -166,7 +166,7 @@ static void collect_cpu_info (void *unused) wrmsr(MSR_IA32_UCODE_REV, 0, 0); /* see notes above for revision 1.07. Apparent chip bug */ - serialize_cpu(); + sync_core(); /* get the current revision from MSR 0x8B */ rdmsr(MSR_IA32_UCODE_REV, val[0], uci->rev); pr_debug("microcode: collect_cpu_info : sig=0x%x, pf=0x%x, rev=0x%x\n", @@ -380,7 +380,7 @@ static void do_update_one (void * unused) wrmsr(MSR_IA32_UCODE_REV, 0, 0); /* see notes above for revision 1.07. Apparent chip bug */ - serialize_cpu(); + sync_core(); /* get the current revision from MSR 0x8B */ rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]); -- cgit v1.2.3