Messages in this thread Patch in this message | | | Date | Wed, 22 Oct 2008 18:00:09 +0400 | From | Cyrill Gorcunov <> | Subject | [PATCH -tip] x86: do_boot_cpu - check if we have ESR register |
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We should touch ESR register if only we have it. The patch fixes the problem mentoined here
http://lkml.org/lkml/2008/10/17/147
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> CC: Glauber Costa <glommer@gmail.com> ---
arch/x86/kernel/smpboot.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
Index: linux-2.6.git/arch/x86/kernel/smpboot.c =================================================================== --- linux-2.6.git.orig/arch/x86/kernel/smpboot.c 2008-10-21 20:35:27.000000000 +0400 +++ linux-2.6.git/arch/x86/kernel/smpboot.c 2008-10-22 17:45:28.000000000 +0400 @@ -894,8 +894,10 @@ do_rest: /* * Be paranoid about clearing APIC errors. */ - apic_write(APIC_ESR, 0); - apic_read(APIC_ESR); + if (APIC_INTEGRATED(apic_version[phys_apicid])) { + apic_write(APIC_ESR, 0); + apic_read(APIC_ESR); + } } /*
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