[PATCH 0/2 try#4] x86: MCE optimization and cleanups

Previous thread: [patch 2/2] Check if the crashkernel area is behind BSS by Bernhard Walle on Monday, October 15, 2007 - 7:50 am. (1 message)

Next thread: [PATCH] Blackfin I2C/TWI driver: update for 2.6.24 merge windows by Bryan Wu on Monday, October 15, 2007 - 9:53 am. (8 messages)
To: Thomas Gleixner <tglx@...>
Cc: Linux Kernel Mailing List <linux-kernel@...>
Date: Monday, October 15, 2007 - 8:16 am

This patchset includes two patches.

1. Checks for the MCA fetures as early as possible and signedness fixup.
2. Minor coding style cleanup.

-

To: Thomas Gleixner <tglx@...>
Cc: Linux Kernel Mailing List <linux-kernel@...>, Joerg Roedel <joerg.roedel@...>, Christoph Egger <Christoph.Egger@...>
Date: Monday, October 15, 2007 - 8:16 am

MCG_CAP never reports a negative count of available error-reporting banks.
Therefore, make nr_mce_banks unsigned.
Check for MCE feature bit as early as possible and clean up the extra _MCE
checks in the various cpu init type functions per request from Thomas Gleixner.

Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/kernel/cpu/mcheck/k7.c | 6 +-----
arch/x86/kernel/cpu/mcheck/mce.c | 12 ++++++++++--
arch/x86/kernel/cpu/mcheck/mce.h | 2 +-
arch/x86/kernel/cpu/mcheck/p5.c | 4 ----
arch/x86/kernel/cpu/mcheck/p6.c | 4 ----
5 files changed, 12 insertions(+), 16 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/k7.c b/arch/x86/kernel/cpu/mcheck/k7.c
index eef63e3..ad68cc9 100644
--- a/arch/x86/kernel/cpu/mcheck/k7.c
+++ b/arch/x86/kernel/cpu/mcheck/k7.c
@@ -72,13 +72,9 @@ void amd_mcheck_init(struct cpuinfo_x86 *c)
u32 l, h;
int i;

- if (!cpu_has(c, X86_FEATURE_MCE))
- return;
-
machine_check_vector = k7_machine_check;
wmb();

- printk (KERN_INFO "Intel machine check architecture supported.\n");
rdmsr (MSR_IA32_MCG_CAP, l, h);
if (l & (1<<8)) /* Control register present ? */
wrmsr (MSR_IA32_MCG_CTL, 0xffffffff, 0xffffffff);
@@ -97,6 +93,6 @@ void amd_mcheck_init(struct cpuinfo_x86 *c)
}

set_in_cr4 (X86_CR4_MCE);
- printk (KERN_INFO "Intel machine check reporting enabled on CPU#%d.\n",
+ printk (KERN_INFO "CPU%d: AMD K7 machine check reporting enabled.\n",
smp_processor_id());
}
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 34c781e..c7246cc 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -17,7 +17,7 @@
#include "mce.h"

int mce_disabled = 0;
-int nr_mce_banks;
+unsigned int nr_mce_banks;

EXPORT_SYMBOL_GPL(nr_mce_banks); /* non-fatal.o */

@@ -33,8 +33,16 @@ void fastcall (*machine_check_vector)(struct pt_regs *, long error_code) = u...

To: Thomas Gleixner <tglx@...>
Cc: Linux Kernel Mailing List <linux-kernel@...>, Joerg Roedel <joerg.roedel@...>, Christoph Egger <Christoph.Egger@...>
Date: Monday, October 15, 2007 - 8:16 am

remove one indent level

Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/kernel/cpu/mcheck/mce.c | 40 +++++++++++++++++++-------------------
1 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index c7246cc..e418c2f 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -45,26 +45,26 @@ void mcheck_init(struct cpuinfo_x86 *c)
}

switch (c->x86_vendor) {
- case X86_VENDOR_AMD:
- amd_mcheck_init(c);
- break;
-
- case X86_VENDOR_INTEL:
- if (c->x86==5)
- intel_p5_mcheck_init(c);
- if (c->x86==6)
- intel_p6_mcheck_init(c);
- if (c->x86==15)
- intel_p4_mcheck_init(c);
- break;
-
- case X86_VENDOR_CENTAUR:
- if (c->x86==5)
- winchip_mcheck_init(c);
- break;
-
- default:
- break;
+ case X86_VENDOR_AMD:
+ amd_mcheck_init(c);
+ break;
+
+ case X86_VENDOR_INTEL:
+ if (c->x86==5)
+ intel_p5_mcheck_init(c);
+ if (c->x86==6)
+ intel_p6_mcheck_init(c);
+ if (c->x86==15)
+ intel_p4_mcheck_init(c);
+ break;
+
+ case X86_VENDOR_CENTAUR:
+ if (c->x86==5)
+ winchip_mcheck_init(c);
+ break;
+
+ default:
+ break;
}
}

--
1.5.2.5

-

Previous thread: [patch 2/2] Check if the crashkernel area is behind BSS by Bernhard Walle on Monday, October 15, 2007 - 7:50 am. (1 message)

Next thread: [PATCH] Blackfin I2C/TWI driver: update for 2.6.24 merge windows by Bryan Wu on Monday, October 15, 2007 - 9:53 am. (8 messages)