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| author | Andi Kleen <ak@suse.de> | 2006-01-11 22:45:27 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 19:04:58 -0800 |
| commit | 487472bc01fab0625996aad37836aad931e4eda9 (patch) | |
| tree | ede143ee4c756413b396911b3702068283b052f2 /arch | |
| parent | c818a18146997d1356a4840b0c01f1168c16c8a4 (diff) | |
| download | linux-3.10-487472bc01fab0625996aad37836aad931e4eda9.tar.gz linux-3.10-487472bc01fab0625996aad37836aad931e4eda9.tar.bz2 linux-3.10-487472bc01fab0625996aad37836aad931e4eda9.zip | |
[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 <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/i386/kernel/microcode.c | 4 |
1 files changed, 2 insertions, 2 deletions
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]); |