summaryrefslogtreecommitdiff
path: root/arch/powerpc/include/asm/book3s/pgtable.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/include/asm/book3s/pgtable.h')
-rw-r--r--arch/powerpc/include/asm/book3s/pgtable.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/pgtable.h b/arch/powerpc/include/asm/book3s/pgtable.h
index 6436b65ac7bc..0e1263455d73 100644
--- a/arch/powerpc/include/asm/book3s/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/pgtable.h
@@ -26,5 +26,16 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
unsigned long size, pgprot_t vma_prot);
#define __HAVE_PHYS_MEM_ACCESS_PROT
+/*
+ * This gets called at the end of handling a page fault, when
+ * the kernel has put a new PTE into the page table for the process.
+ * We use it to ensure coherency between the i-cache and d-cache
+ * for the page which has just been mapped in.
+ * On machines which use an MMU hash table, we use this to put a
+ * corresponding HPTE into the hash table ahead of time, instead of
+ * waiting for the inevitable extra hash-table miss exception.
+ */
+void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t *ptep);
+
#endif /* __ASSEMBLY__ */
#endif