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linux-sg2042
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[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>
This commit is contained in:
Hugh Dickins 2005-11-29 16:54:51 +00:00 committed by Linus Torvalds
parent 5d2a2dbbc1
commit e5bbe4dfc8
1 changed files with 3 additions and 4 deletions
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7
mm/memory.c
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@ -1433,12 +1433,11 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
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 @@ gotten:
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 @@ gotten:
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);
}
/*