Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=df3624aa293dfa2d46089747d919711089a702eb
Commit: df3624aa293dfa2d46089747d919711089a702eb
Parent: 62918a036148230ba1ad175dc8a0952e3752ac57
Author: Daniel Walker <[EMAIL PROTECTED]>
AuthorDate: Wed May 2 19:27:18 2007 +0200
Committer: Andi Kleen <[EMAIL PROTECTED]>
CommitDate: Wed May 2 19:27:18 2007 +0200
[PATCH] i386: remove xtime_lock'ing around cpufreq notifier
The locking of the xtime_lock around the cpu notifier is unessesary now.
At one time the tsc was used after a frequency change for timekeeping, but
the re-write of timekeeping no longer uses the TSC unless the frequency is
constant.
The variables that are changed in this section of code had also once been
used for timekeeping, but not any longer ..
Signed-off-by: Daniel Walker <[EMAIL PROTECTED]>
Signed-off-by: Andi Kleen <[EMAIL PROTECTED]>
Cc: Andi Kleen <[EMAIL PROTECTED]>
Cc: Ingo Molnar <[EMAIL PROTECTED]>
Cc: Thomas Gleixner <[EMAIL PROTECTED]>
Cc: john stultz <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
arch/i386/kernel/tsc.c | 8 +-------
1 files changed, 1 insertions(+), 7 deletions(-)
diff --git a/arch/i386/kernel/tsc.c b/arch/i386/kernel/tsc.c
index 755209d..f64b81f 100644
--- a/arch/i386/kernel/tsc.c
+++ b/arch/i386/kernel/tsc.c
@@ -200,13 +200,10 @@ time_cpufreq_notifier(struct notifier_block *nb, unsigned
long val, void *data)
{
struct cpufreq_freqs *freq = data;
- if (val != CPUFREQ_RESUMECHANGE && val != CPUFREQ_SUSPENDCHANGE)
- write_seqlock_irq(&xtime_lock);
-
if (!ref_freq) {
if (!freq->old){
ref_freq = freq->new;
- goto end;
+ return 0;
}
ref_freq = freq->old;
loops_per_jiffy_ref = cpu_data[freq->cpu].loops_per_jiffy;
@@ -237,9 +234,6 @@ time_cpufreq_notifier(struct notifier_block *nb, unsigned
long val, void *data)
}
}
}
-end:
- if (val != CPUFREQ_RESUMECHANGE && val != CPUFREQ_SUSPENDCHANGE)
- write_sequnlock_irq(&xtime_lock);
return 0;
}
-
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