From c697836985e18d9c34897428ba563b13044a6dcd Mon Sep 17 00:00:00 2001 From: Hidetoshi Seto Date: Mon, 15 Jun 2009 17:22:49 +0900 Subject: [PATCH] x86, mce: make mce_disabled boolean The mce_disabled on 32bit is a tristate variable [1,0,-1], while 64bit version is boolean [0,1]. This patch makes mce_disabled always boolean, and use mce_p5_enabled to indicate the third state instead. Signed-off-by: Hidetoshi Seto Signed-off-by: H. Peter Anvin --- arch/x86/include/asm/mce.h | 8 +++----- arch/x86/kernel/cpu/mcheck/mce.c | 8 +++----- arch/x86/kernel/cpu/mcheck/p5.c | 12 +++++------- 3 files changed, 11 insertions(+), 17 deletions(-) diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index aae6fe2..6568cde 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -107,6 +107,7 @@ struct mce_log { #include extern int mce_disabled; +extern int mce_p5_enabled; #ifdef CONFIG_X86_OLD_MCE void amd_mcheck_init(struct cpuinfo_x86 *c); @@ -117,14 +118,11 @@ void intel_p6_mcheck_init(struct cpuinfo_x86 *c); #ifdef CONFIG_X86_ANCIENT_MCE void intel_p5_mcheck_init(struct cpuinfo_x86 *c); void winchip_mcheck_init(struct cpuinfo_x86 *c); -extern int mce_p5_enable; -static inline int mce_p5_enabled(void) { return mce_p5_enable; } -static inline void enable_p5_mce(void) { mce_p5_enable = 1; } +static inline void enable_p5_mce(void) { mce_p5_enabled = 1; } #else static inline void intel_p5_mcheck_init(struct cpuinfo_x86 *c) {} static inline void winchip_mcheck_init(struct cpuinfo_x86 *c) {} -static inline int mce_p5_enabled(void) { return 0; } -static inline void enable_p5_mce(void) { } +static inline void enable_p5_mce(void) {} #endif /* Call the installed machine check handler for this CPU setup. */ diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index faedd77..6095e02 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -1286,8 +1286,7 @@ static void __cpuinit mce_ancient_init(struct cpuinfo_x86 *c) return; switch (c->x86_vendor) { case X86_VENDOR_INTEL: - if (mce_p5_enabled()) - intel_p5_mcheck_init(c); + intel_p5_mcheck_init(c); break; case X86_VENDOR_CENTAUR: winchip_mcheck_init(c); @@ -2002,7 +2001,7 @@ EXPORT_SYMBOL_GPL(nr_mce_banks); /* non-fatal.o */ /* This has to be run for each processor */ void mcheck_init(struct cpuinfo_x86 *c) { - if (mce_disabled == 1) + if (mce_disabled) return; switch (c->x86_vendor) { @@ -2032,10 +2031,9 @@ void mcheck_init(struct cpuinfo_x86 *c) static int __init mcheck_enable(char *str) { - mce_disabled = -1; + mce_p5_enabled = 1; return 1; } - __setup("mce", mcheck_enable); #endif /* CONFIG_X86_OLD_MCE */ diff --git a/arch/x86/kernel/cpu/mcheck/p5.c b/arch/x86/kernel/cpu/mcheck/p5.c index 747853f..5c0e653 100644 --- a/arch/x86/kernel/cpu/mcheck/p5.c +++ b/arch/x86/kernel/cpu/mcheck/p5.c @@ -14,7 +14,7 @@ #include /* By default disabled */ -int mce_p5_enable; +int mce_p5_enabled __read_mostly; /* Machine check handler for Pentium class Intel CPUs: */ static void pentium_machine_check(struct pt_regs *regs, long error_code) @@ -42,15 +42,13 @@ void intel_p5_mcheck_init(struct cpuinfo_x86 *c) { u32 l, h; - /* Check for MCE support: */ - if (!cpu_has(c, X86_FEATURE_MCE)) + /* Default P5 to off as its often misconnected: */ + if (!mce_p5_enabled) return; -#ifdef CONFIG_X86_OLD_MCE - /* Default P5 to off as its often misconnected: */ - if (mce_disabled != -1) + /* Check for MCE support: */ + if (!cpu_has(c, X86_FEATURE_MCE)) return; -#endif machine_check_vector = pentium_machine_check; /* Make sure the vector pointer is visible before we enable MCEs: */ -- 2.7.4