On Saturday 30 June 2007 05:03, linux@xxxxxxxxxxx wrote:
> Anyway, the patch which introduces the problem is the aptly named 3ebad:
> 3ebad59056: [PATCH] x86: Save and restore the fixed-range MTRRs of the BSP
> when suspending
>
> 2.6.22-rc6 plus that one commit reverted successfully does APM suspend
> (and resume) for me.
Mr.Linux, Does that patch fix it?
-Andi
i386: Check if CPU has MTRRs before trying to save them
Signed-off-by: Andi Kleen <ak@xxxxxxx>
Index: linux/arch/i386/kernel/cpu/mtrr/main.c
===================================================================
--- linux.orig/arch/i386/kernel/cpu/mtrr/main.c
+++ linux/arch/i386/kernel/cpu/mtrr/main.c
@@ -734,8 +734,11 @@ void mtrr_ap_init(void)
*/
void mtrr_save_state(void)
{
- int cpu = get_cpu();
+ int cpu;
+ if (!cpu_has_mtrr)
+ return;
+ cpu = get_cpu();
if (cpu == 0)
mtrr_save_fixed_ranges(NULL);
else
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