diff options
| author | Colin Cross <[email protected]> | 2011-03-03 14:17:49 -0800 |
|---|---|---|
| committer | Colin Cross <[email protected]> | 2011-03-03 14:17:49 -0800 |
| commit | c871fe663a6368fd0e98f5a3bfd81b0b9c591266 (patch) | |
| tree | d09c244e94c09f985caf259c434c7eda8ff53229 /mm/memory.c | |
| parent | d5fdafd38ca0c28c4648909ce0afd0a5420309ca (diff) | |
| parent | db811ca0f48578f9940f49f284ac81e336b264ad (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.c | 32 |
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 { |