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| author | R Sharada <sharada@in.ibm.com> | 2006-02-22 21:43:08 +0530 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-02-24 11:36:29 +1100 |
| commit | 47f78a49206b7f9b0d283ba46a2a5a6ee1796472 (patch) | |
| tree | c58b73bf34271888016873699001f54e4b205dbc /arch/powerpc | |
| parent | 611ae59c62e688792cd1e6a68b9dc0f68d0e0dff (diff) | |
| download | linux-47f78a49206b7f9b0d283ba46a2a5a6ee1796472.tar.gz linux-47f78a49206b7f9b0d283ba46a2a5a6ee1796472.tar.bz2 linux-47f78a49206b7f9b0d283ba46a2a5a6ee1796472.zip | |
[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>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/mm/hash_native_64.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/powerpc/mm/hash_native_64.c b/arch/powerpc/mm/hash_native_64.c index d96bcfe4c6f6..33654d1b1b43 100644 --- a/arch/powerpc/mm/hash_native_64.c +++ b/arch/powerpc/mm/hash_native_64.c @@ -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); } |