Changelog^^^
* Provide atomic pte operations for x86_64
Signed-off-by: Christoph Lameter <clameter@xxxxxxx>
Index: linux-2.6.10/include/asm-x86_64/pgalloc.h
===================================================================
--- linux-2.6.10.orig/include/asm-x86_64/pgalloc.h 2005-01-03 10:31:31.000000000 -0800
+++ linux-2.6.10/include/asm-x86_64/pgalloc.h 2005-01-03 12:21:28.000000000 -0800
@@ -7,6 +7,10 @@
#include <linux/threads.h>
#include <linux/mm.h>
+#define PMD_NONE 0
+#define PUD_NONE 0
+#define PGD_NONE 0
+
#define pmd_populate_kernel(mm, pmd, pte) \
set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)))
#define pud_populate(mm, pud, pmd) \
@@ -14,11 +18,24 @@
#define pgd_populate(mm, pgd, pud) \
set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)))
+#define pmd_test_and_populate(mm, pmd, pte) \
+ (cmpxchg((int *)pmd, PMD_NONE, _PAGE_TABLE | __pa(pte)) == PMD_NONE)
+#define pud_test_and_populate(mm, pud, pmd) \
+ (cmpxchg((int *)pgd, PUD_NONE, _PAGE_TABLE | __pa(pmd)) == PUD_NONE)
+#define pgd_test_and_populate(mm, pgd, pud) \
+ (cmpxchg((int *)pgd, PGD_NONE, _PAGE_TABLE | __pa(pud)) == PGD_NONE)
+
+