From: Pavel Machek <pavel@ucw.cz>
To: Thomas Gleixner <tglx@linutronix.de>, jbohac@suse.cz
Cc: kernel list <linux-kernel@vger.kernel.org>,
jikos@suse.cz, Ingo Molnar <mingo@elte.hu>,
"Rafael J. Wysocki" <rjw@sisk.pl>, Andrew Morton <akpm@osdl.org>
Subject: notsc is ignored on common configurations
Date: Tue, 19 Feb 2008 11:02:30 +0100 [thread overview]
Message-ID: <20080219100230.GA1688@elf.ucw.cz> (raw)
In-Reply-To: <alpine.LFD.1.00.0802181545090.7583@apollo.tec.linutronix.de>
notsc is ignored in 32-bit kernels if CONFIG_X86_TSC is on.. which is
bad, fix it.
Signed-off-by: Pavel Machek <pavel@suse.cz>
diff --git a/arch/x86/kernel/tsc_32.c b/arch/x86/kernel/tsc_32.c
index fafd9dc..3804fbe 100644
--- a/arch/x86/kernel/tsc_32.c
+++ b/arch/x86/kernel/tsc_32.c
@@ -28,7 +28,8 @@ #ifdef CONFIG_X86_TSC
static int __init tsc_setup(char *str)
{
printk(KERN_WARNING "notsc: Kernel compiled with CONFIG_X86_TSC, "
- "cannot disable TSC.\n");
+ "cannot disable TSC completely.\n");
+ mark_tsc_unstable("user disabled TSC");
return 1;
}
#else
@@ -221,9 +222,9 @@ #ifdef CONFIG_CPU_FREQ
* if the CPU frequency is scaled, TSC-based delays will need a different
* loops_per_jiffy value to function properly.
*/
-static unsigned int ref_freq = 0;
-static unsigned long loops_per_jiffy_ref = 0;
-static unsigned long cpu_khz_ref = 0;
+static unsigned int ref_freq;
+static unsigned long loops_per_jiffy_ref;
+static unsigned long cpu_khz_ref;
static int
time_cpufreq_notifier(struct notifier_block *nb, unsigned long val, void *data)
@@ -285,7 +286,7 @@ #endif
/* clock source code */
-static unsigned long current_tsc_khz = 0;
+static unsigned long current_tsc_khz;
static cycle_t read_tsc(void)
{
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2008-02-19 11:23 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-18 13:38 tsc breaks atkbd suspend Pavel Machek
2008-02-18 14:26 ` Thomas Gleixner
2008-02-18 14:37 ` Pavel Machek
2008-02-18 15:12 ` Thomas Gleixner
2008-02-19 9:20 ` Pavel Machek
2008-02-19 9:37 ` Pavel Machek
2008-02-19 10:00 ` Pavel Machek
2008-02-19 14:05 ` Ingo Molnar
2008-02-19 16:51 ` Thomas Gleixner
2008-02-20 0:17 ` Len Brown
2008-02-20 6:51 ` Thomas Gleixner
2008-02-19 10:02 ` Pavel Machek [this message]
2008-02-19 11:26 ` notsc is ignored on common configurations Ingo Molnar
2008-02-19 11:29 ` Pavel Machek
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