[PATCH] pfnmap: remove src_page from do_wp_page
Clean away do_wp_page's "src_page": cow_user_page makes it unnecessary.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/mm/memory.c b/mm/memory.c
index 745b348..ae259b6 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1433,12 +1433,11 @@
unsigned long address, pte_t *page_table, pmd_t *pmd,
spinlock_t *ptl, pte_t orig_pte)
{
- struct page *old_page, *src_page, *new_page;
+ struct page *old_page, *new_page;
pte_t entry;
int ret = VM_FAULT_MINOR;
old_page = vm_normal_page(vma, address, orig_pte);
- src_page = old_page;
if (!old_page)
goto gotten;
@@ -1466,7 +1465,7 @@
if (unlikely(anon_vma_prepare(vma)))
goto oom;
- if (src_page == ZERO_PAGE(address)) {
+ if (old_page == ZERO_PAGE(address)) {
new_page = alloc_zeroed_user_highpage(vma, address);
if (!new_page)
goto oom;
@@ -1474,7 +1473,7 @@
new_page = alloc_page_vma(GFP_HIGHUSER, vma, address);
if (!new_page)
goto oom;
- cow_user_page(new_page, src_page, address);
+ cow_user_page(new_page, old_page, address);
}
/*