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Old 07-15-2011, 09:37 PM
Len Brown
 
Default x86, intel, power: Correct the MSR_IA32_ENERGY_PERF_BIAS message

BugLink: http://bugs.launchpad.net/bugs/829566

Fix the printk_once() so that it actually prints (didn't print before
due to a stray comma.)

[ hpa: changed to an incremental patch and adjusted the description
accordingly. ]

Signed-off-by: Len Brown <len.brown@intel.com>
Link: http://lkml.kernel.org/r/alpine.LFD.2.02.1107151732480.18606@x980
Cc: <table@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
(cherry picked from commit 17edf2d79f1ea6dfdb4c444801d928953b9f98d6)

Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
---
arch/x86/kernel/cpu/intel.c | 10 +++++-----
1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 7c1ca07..24cba78 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -457,11 +457,11 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
u64 epb;

rdmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
- if ((epb & 0xF) == 0) {
- printk_once(KERN_WARNING, "x86: updated energy_perf_bias"
- " to 'normal' from 'performance'
"
- "You can view and update epb via utility,"
- " such as x86_energy_perf_policy(8)
");
+ if ((epb & 0xF) == ENERGY_PERF_BIAS_PERFORMANCE) {
+ printk_once(KERN_WARNING "ENERGY_PERF_BIAS:"
+ " Set to 'normal', was 'performance'
"
+ "ENERGY_PERF_BIAS: View and update with"
+ " x86_energy_perf_policy(8)
");
epb = (epb & ~0xF) | ENERGY_PERF_BIAS_NORMAL;
wrmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
}
--
1.7.0.4


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