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[PATCH] powerpc64: fix spinlock recursion in native_hpte_clear 

native_hpte_clear has a spinlock recursion problem with the native_tlbie_lock
being called twice, once in native_hpte_clear() and once within tlbie().
Fix the problem by changing the call to tlbie() in native_hpte_clear() to
__tlbie(). It still supports only 4k pages for now.

Signed-off-by: R Sharada <sharada@in.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
R Sharada 2006-02-22 21:43:08 +05:30 committed by Paul Mackerras
parent 611ae59c62
commit 47f78a4920
1 changed files with 6 additions and 1 deletions
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7
arch/powerpc/mm/hash_native_64.c
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@ -403,12 +403,17 @@ static void native_hpte_clear(void)
*/
hpte_v = hptep->v;
/*
* Call __tlbie() here rather than tlbie() since we
* already hold the native_tlbie_lock.
*/
if (hpte_v & HPTE_V_VALID) {
hptep->v = 0;
tlbie(slot2va(hpte_v, slot), MMU_PAGE_4K, 0);
__tlbie(slot2va(hpte_v, slot), MMU_PAGE_4K);
}
}
asm volatile("eieio; tlbsync; ptesync":::"memory");
spin_unlock(&native_tlbie_lock);
local_irq_restore(flags);
}