mtrr atomicity fix
Rafael gets this on an SMP box with kernel preemption enabled, during hibernation and restore (100% of the time): Enabling non-boot CPUs ... BUG: using smp_processor_id() in preemptible [00000001] code: bash/4514 caller is mtrr_save_state+0x9/0x40 Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -734,10 +734,13 @@ void mtrr_ap_init(void)
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*/
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void mtrr_save_state(void)
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{
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if (smp_processor_id() == 0)
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int cpu = get_cpu();
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if (cpu == 0)
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mtrr_save_fixed_ranges(NULL);
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else
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smp_call_function_single(0, mtrr_save_fixed_ranges, NULL, 1, 1);
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put_cpu();
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}
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static int __init mtrr_init_finialize(void)
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