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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-07-23 08:53:23 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-07-23 08:53:23 +1000
commitca91e6c09d656c6deb1f2bc5d57186c718106aa5 (patch)
treea8d30759b6fac5616691b7a4a94222ab371d2bd6 /arch/powerpc/mm/hash_low_64.S
parentb1623e7eb280f853f60338c7bb68bd3f3a970205 (diff)
powerpc/mm: Move around testing of _PAGE_PRESENT in hash code
Instead of adding _PAGE_PRESENT to the access permission mask in each low level routine independently, we add it once from hash_page(). We also move the preliminary access check (the racy one before the PTE is locked) up so it applies to the huge page case. This duplicates code in __hash_page_huge() which we'll remove in a subsequent patch to fix a race in there. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/hash_low_64.S')
-rw-r--r--arch/powerpc/mm/hash_low_64.S9
1 files changed, 0 insertions, 9 deletions
diff --git a/arch/powerpc/mm/hash_low_64.S b/arch/powerpc/mm/hash_low_64.S
index a719f53921a..3079f6b44cf 100644
--- a/arch/powerpc/mm/hash_low_64.S
+++ b/arch/powerpc/mm/hash_low_64.S
@@ -68,9 +68,6 @@ _GLOBAL(__hash_page_4K)
std r8,STK_PARM(r8)(r1)
std r9,STK_PARM(r9)(r1)
- /* Add _PAGE_PRESENT to access */
- ori r4,r4,_PAGE_PRESENT
-
/* Save non-volatile registers.
* r31 will hold "old PTE"
* r30 is "new PTE"
@@ -347,9 +344,6 @@ _GLOBAL(__hash_page_4K)
std r8,STK_PARM(r8)(r1)
std r9,STK_PARM(r9)(r1)
- /* Add _PAGE_PRESENT to access */
- ori r4,r4,_PAGE_PRESENT
-
/* Save non-volatile registers.
* r31 will hold "old PTE"
* r30 is "new PTE"
@@ -687,9 +681,6 @@ _GLOBAL(__hash_page_64K)
std r8,STK_PARM(r8)(r1)
std r9,STK_PARM(r9)(r1)
- /* Add _PAGE_PRESENT to access */
- ori r4,r4,_PAGE_PRESENT
-
/* Save non-volatile registers.
* r31 will hold "old PTE"
* r30 is "new PTE"