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[PATCH] i386: Small cleanup to TLB flush code

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- Remove outdated comment
- Use cpu_relax() in a busy loop

Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Andi Kleen 2007-02-13 13:26:23 +01:00 committed by Andi Kleen
parent 930f8b8bcd
commit 8c40ad02e5
1 changed files with 2 additions and 3 deletions
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5
arch/i386/kernel/smp.c
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@ -375,8 +375,7 @@ static void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
/*
* i'm not happy about this global shared spinlock in the
* MM hot path, but we'll see how contended it is.
* Temporarily this turns IRQs off, so that lockups are
* detected by the NMI watchdog.
* AK: x86-64 has a faster method that could be ported.
*/
spin_lock(&tlbstate_lock);
@ -401,7 +400,7 @@ static void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
while (!cpus_empty(flush_cpumask))
/* nothing. lockup detection does not belong here */
mb();
cpu_relax();
flush_mm = NULL;
flush_va = 0;