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authorDave Kleikamp <shaggy@linux.vnet.ibm.com>2008-07-08 00:28:52 +1000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2008-07-09 16:30:45 +1000
commitaba46c5027cb59d98052231b36efcbbde9c77a1d (patch)
treeb69dd362c74db562789d14136294c5fcbb7632e7 /include/linux/mm.h
parentb845f313d78e4e259ec449909e3bbadf77b53a6d (diff)
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powerpc/mm: Define flags for Strong Access Ordering
This patch defines: - PROT_SAO, which is passed into mmap() and mprotect() in the prot field - VM_SAO in vma->vm_flags, and - _PAGE_SAO, the combination of WIMG bits in the pte that enables strong access ordering for the page. Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r--include/linux/mm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 586a943..6891844 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -108,6 +108,7 @@ extern unsigned int kobjsize(const void *objp);
#define VM_CAN_NONLINEAR 0x08000000 /* Has ->fault & does nonlinear pages */
#define VM_MIXEDMAP 0x10000000 /* Can contain "struct page" and pure PFN pages */
+#define VM_SAO 0x20000000 /* Strong Access Ordering (powerpc) */
#ifndef VM_STACK_DEFAULT_FLAGS /* arch can override this */
#define VM_STACK_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS
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