From 072449e7e4d9a9d43070fd429947163758f4d717 Mon Sep 17 00:00:00 2001 From: Johannes Weiner Date: Mon, 24 May 2010 14:32:39 -0700 Subject: [PATCH] --- yaml --- r: 198258 b: refs/heads/master c: 142762bd8d8c46345e79f0f68d3374564306972f h: refs/heads/master v: v3 --- [refs] | 2 +- trunk/mm/memory.c | 13 +++++++++++-- 2 files changed, 12 insertions(+), 3 deletions(-) diff --git a/[refs] b/[refs] index 2bd0209c44d7..86c9d56f6034 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: 58a9d3d8db06ca2ec31f64ec49ab0aeb89971b85 +refs/heads/master: 142762bd8d8c46345e79f0f68d3374564306972f diff --git a/trunk/mm/memory.c b/trunk/mm/memory.c index 833952d8b74d..119b7ccdf39b 100644 --- a/trunk/mm/memory.c +++ b/trunk/mm/memory.c @@ -1227,8 +1227,17 @@ int zap_vma_ptes(struct vm_area_struct *vma, unsigned long address, } EXPORT_SYMBOL_GPL(zap_vma_ptes); -/* - * Do a quick page-table lookup for a single page. +/** + * follow_page - look up a page descriptor from a user-virtual address + * @vma: vm_area_struct mapping @address + * @address: virtual address to look up + * @flags: flags modifying lookup behaviour + * + * @flags can have FOLL_ flags set, defined in + * + * Returns the mapped (struct page *), %NULL if no mapping exists, or + * an error pointer if there is a mapping to something not represented + * by a page descriptor (see also vm_normal_page()). */ struct page *follow_page(struct vm_area_struct *vma, unsigned long address, unsigned int flags)