On Aug 29, 2008, at 8:56 AM, Kumar Gala wrote:
There are some minor issues with support 64-bit PTEs on a 32-bit
processor
when dealing with SMP.
* We need to order the stores in set_pte_at to make sure the flag word
is set second.
* Change pte_clear to use pte_update so only the flag word is cleared
Signed-off-by: Kumar Gala <[EMAIL PROTECTED]>
---
arch/powerpc/include/asm/pgtable-ppc32.h | 14 ++++++++++----
1 files changed, 10 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/include/asm/pgtable-ppc32.h b/arch/powerpc/
include/asm/pgtable-ppc32.h
index 6fe39e3..db2e7bd 100644
--- a/arch/powerpc/include/asm/pgtable-ppc32.h
+++ b/arch/powerpc/include/asm/pgtable-ppc32.h
@@ -517,7 +517,7 @@ extern unsigned long
bad_call_to_PMD_PAGE_SIZE(void);
#define pte_none(pte) ((pte_val(pte) & ~_PTE_NONE_MASK) == 0)
#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
-#define pte_clear(mm,addr,ptep) do { set_pte_at((mm), (addr),
(ptep), __pte(0)); } while (0)
+#define pte_clear(mm,addr,ptep) do { pte_update(ptep, ~0, 0); }
while (0)
This breaks classic... Need to avoid changing PAGE_HASHPTE.
Cheers,
-Becky
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