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authorKumar Gala <galak@kernel.crashing.org>2008-11-19 12:50:04 +0000
committerPaul Mackerras <paulus@samba.org>2008-12-03 20:46:35 +1100
commit0186f47e703fb7aa14b54459d642ef5374b3a685 (patch)
tree5af0bc2bf92b9ef7edf79aab989387de4d8ffaaf /arch/powerpc/include/asm/pgalloc.h
parentdf3b8611554e389e703fa753540289874fa5126c (diff)
powerpc: Use RCU based pte freeing mechanism for all powerpc
Refactor the RCU based pte free code that was used on ppc64 to be used on all powerpc. Additionally refactor pte_free() & pte_free_kernel() into common code between ppc32 & ppc64. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/include/asm/pgalloc.h')
-rw-r--r--arch/powerpc/include/asm/pgalloc.h41
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pgalloc.h b/arch/powerpc/include/asm/pgalloc.h
index b4505ed0f0f..5d8480265a7 100644
--- a/arch/powerpc/include/asm/pgalloc.h
+++ b/arch/powerpc/include/asm/pgalloc.h
@@ -2,11 +2,52 @@
#define _ASM_POWERPC_PGALLOC_H
#ifdef __KERNEL__
+#include <linux/mm.h>
+
+static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+ free_page((unsigned long)pte);
+}
+
+static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
+{
+ pgtable_page_dtor(ptepage);
+ __free_page(ptepage);
+}
+
+typedef struct pgtable_free {
+ unsigned long val;
+} pgtable_free_t;
+
+#define PGF_CACHENUM_MASK 0x7
+
+static inline pgtable_free_t pgtable_free_cache(void *p, int cachenum,
+ unsigned long mask)
+{
+ BUG_ON(cachenum > PGF_CACHENUM_MASK);
+
+ return (pgtable_free_t){.val = ((unsigned long) p & ~mask) | cachenum};
+}
+
#ifdef CONFIG_PPC64
#include <asm/pgalloc-64.h>
#else
#include <asm/pgalloc-32.h>
#endif
+extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
+
+#ifdef CONFIG_SMP
+#define __pte_free_tlb(tlb,ptepage) \
+do { \
+ pgtable_page_dtor(ptepage); \
+ pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
+ PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1)); \
+} while (0)
+#else
+#define __pte_free_tlb(tlb, pte) pte_free((tlb)->mm, (pte))
+#endif
+
+
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_PGALLOC_H */