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[IA64] bugfix: nptcg breaks cpu-hotadd 

If "max_purges" from PAL is 0, it actually means 1.

However it was not handled later when a hot-added cpu pass the
max_purges from PAL.  This makes systems easy to go BUG_ON().

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Hidetoshi Seto 2008-04-25 23:13:09 +09:00 committed by Tony Luck
parent 7663c1e279
commit e617fce64e
1 changed files with 4 additions and 1 deletions
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3
arch/ia64/mm/tlb.c
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@ -168,6 +168,9 @@ setup_ptcg_sem(int max_purges, int nptcg_from)
static int firstcpu = 1;
if (toolatetochangeptcgsem) {
if (nptcg_from == NPTCG_FROM_PAL && max_purges == 0)
BUG_ON(1 < nptcg);
else
BUG_ON(max_purges < nptcg);
return;
}