From: Jan Kratochvil Date: Tue, 22 Jul 2008 12:00:47 +0000 (+0200) Subject: x86: fix crash due to missing debugctlmsr on AMD K6-3 X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=d536b1f86591fb081c7a56eab04e711eb4dab951;p=deliverable%2Flinux.git x86: fix crash due to missing debugctlmsr on AMD K6-3 currently if you use PTRACE_SINGLEBLOCK on AMD K6-3 (i586) it will crash. Kernel now wrongly assumes existing DEBUGCTLMSR MSR register there. Removed the assumption also for some other non-K6 CPUs but I am not sure there (but it can only bring small inefficiency there if my assumption is wrong). Based on info from Roland McGrath, Chuck Ebbert and Mikulas Patocka. More info at: https://bugzilla.redhat.com/show_bug.cgi?id=456175 Signed-off-by: Jan Kratochvil Cc: Signed-off-by: Ingo Molnar --- diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu index 54b8c02c71e6..2c518fbc52ec 100644 --- a/arch/x86/Kconfig.cpu +++ b/arch/x86/Kconfig.cpu @@ -414,4 +414,4 @@ config X86_MINIMUM_CPU_FAMILY config X86_DEBUGCTLMSR def_bool y - depends on !(M586MMX || M586TSC || M586 || M486 || M386) + depends on !(MK6 || MWINCHIPC6 || MWINCHIP2 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486 || M386)