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authorColin Cross <[email protected]>2011-03-03 14:17:49 -0800
committerColin Cross <[email protected]>2011-03-03 14:17:49 -0800
commitc871fe663a6368fd0e98f5a3bfd81b0b9c591266 (patch)
treed09c244e94c09f985caf259c434c7eda8ff53229 /mm/memory.c
parentd5fdafd38ca0c28c4648909ce0afd0a5420309ca (diff)
parentdb811ca0f48578f9940f49f284ac81e336b264ad (diff)
Merge branch 'for-2639/i2c/i2c-tegra' of git://git.fluff.org/bjdooks/linux into for-next-i2c
Diffstat (limited to 'mm/memory.c')
-rw-r--r--mm/memory.c32
1 files changed, 12 insertions, 20 deletions
diff --git a/mm/memory.c b/mm/memory.c
index 31250faff390..8e8c18324863 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2219,7 +2219,6 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
&ptl);
if (!pte_same(*page_table, orig_pte)) {
unlock_page(old_page);
- page_cache_release(old_page);
goto unlock;
}
page_cache_release(old_page);
@@ -2289,7 +2288,6 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
&ptl);
if (!pte_same(*page_table, orig_pte)) {
unlock_page(old_page);
- page_cache_release(old_page);
goto unlock;
}
@@ -2367,16 +2365,6 @@ gotten:
}
__SetPageUptodate(new_page);
- /*
- * Don't let another task, with possibly unlocked vma,
- * keep the mlocked page.
- */
- if ((vma->vm_flags & VM_LOCKED) && old_page) {
- lock_page(old_page); /* for LRU manipulation */
- clear_page_mlock(old_page);
- unlock_page(old_page);
- }
-
if (mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))
goto oom_free_new;
@@ -2444,10 +2432,20 @@ gotten:
if (new_page)
page_cache_release(new_page);
- if (old_page)
- page_cache_release(old_page);
unlock:
pte_unmap_unlock(page_table, ptl);
+ if (old_page) {
+ /*
+ * Don't let another task, with possibly unlocked vma,
+ * keep the mlocked page.
+ */
+ if ((ret & VM_FAULT_WRITE) && (vma->vm_flags & VM_LOCKED)) {
+ lock_page(old_page); /* LRU manipulation */
+ munlock_vma_page(old_page);
+ unlock_page(old_page);
+ }
+ page_cache_release(old_page);
+ }
return ret;
oom_free_new:
page_cache_release(new_page);
@@ -3053,12 +3051,6 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
goto out;
}
charged = 1;
- /*
- * Don't let another task, with possibly unlocked vma,
- * keep the mlocked page.
- */
- if (vma->vm_flags & VM_LOCKED)
- clear_page_mlock(vmf.page);
copy_user_highpage(page, vmf.page, address, vma);
__SetPageUptodate(page);
} else {