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authorChris Metcalf <cmetcalf@tilera.com>2012-03-28 13:59:18 -0400
committerChris Metcalf <cmetcalf@tilera.com>2012-05-25 12:48:21 -0400
commit73636b1aacb1a07e6fbe0d25e560e69b024a8e25 (patch)
tree9531c202c6b3f67fba1cd7ac2b83fa32c31fe197 /mm
parent51007004f44c9588d70ffb77e1f52479bd5b0e37 (diff)
arch/tile: allow building Linux with transparent huge pages enabled
The change adds some infrastructure for managing tile pmd's more generally, using pte_pmd() and pmd_pte() methods to translate pmd values to and from ptes, since on TILEPro a pmd is really just a nested structure holding a pgd (aka pte). Several existing pmd methods are moved into this framework, and a whole raft of additional pmd accessors are defined that are used by the transparent hugepage framework. The tile PTE now has a "client2" bit. The bit is used to indicate a transparent huge page is in the process of being split into subpages. This change also fixes a generic bug where the return value of the generic pmdp_splitting_flush() was incorrect. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'mm')
-rw-r--r--mm/pgtable-generic.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c
index 5a74fea182f1..74c0ddaa6fa0 100644
--- a/mm/pgtable-generic.c
+++ b/mm/pgtable-generic.c
@@ -109,8 +109,8 @@ pmd_t pmdp_clear_flush(struct vm_area_struct *vma, unsigned long address,
#ifndef __HAVE_ARCH_PMDP_SPLITTING_FLUSH
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-pmd_t pmdp_splitting_flush(struct vm_area_struct *vma, unsigned long address,
- pmd_t *pmdp)
+void pmdp_splitting_flush(struct vm_area_struct *vma, unsigned long address,
+ pmd_t *pmdp)
{
pmd_t pmd = pmd_mksplitting(*pmdp);
VM_BUG_ON(address & ~HPAGE_PMD_MASK);