diff options
| author | Greg Kroah-Hartman <gregkh@suse.de> | 2010-11-17 13:47:26 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-11-17 13:47:50 -0800 |
| commit | 14c05aa399e30f343f25158c9adfc44631378a96 (patch) | |
| tree | 9ee42af7327555673132cd3cff73449e5392ed2d /mm/filemap.c | |
| parent | 319684b1cd15f24120b9513b38a949539c0b7938 (diff) | |
| parent | e53beacd23d9cb47590da6a7a7f6d417b941a994 (diff) | |
Driver core: Merge 2.6.37-rc2 into driver-core-next
This resolves some build issues that were present in the older -rc1
tree that kept bothering me.
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'mm/filemap.c')
| -rw-r--r-- | mm/filemap.c | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 75572b5f237..ea89840fc65 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -644,7 +644,9 @@ repeat: pagep = radix_tree_lookup_slot(&mapping->page_tree, offset); if (pagep) { page = radix_tree_deref_slot(pagep); - if (unlikely(!page || page == RADIX_TREE_RETRY)) + if (unlikely(!page)) + goto out; + if (radix_tree_deref_retry(page)) goto repeat; if (!page_cache_get_speculative(page)) @@ -660,6 +662,7 @@ repeat: goto repeat; } } +out: rcu_read_unlock(); return page; @@ -777,12 +780,11 @@ repeat: page = radix_tree_deref_slot((void **)pages[i]); if (unlikely(!page)) continue; - /* - * this can only trigger if nr_found == 1, making livelock - * a non issue. - */ - if (unlikely(page == RADIX_TREE_RETRY)) + if (radix_tree_deref_retry(page)) { + if (ret) + start = pages[ret-1]->index; goto restart; + } if (!page_cache_get_speculative(page)) goto repeat; @@ -830,11 +832,7 @@ repeat: page = radix_tree_deref_slot((void **)pages[i]); if (unlikely(!page)) continue; - /* - * this can only trigger if nr_found == 1, making livelock - * a non issue. - */ - if (unlikely(page == RADIX_TREE_RETRY)) + if (radix_tree_deref_retry(page)) goto restart; if (page->mapping == NULL || page->index != index) @@ -887,11 +885,7 @@ repeat: page = radix_tree_deref_slot((void **)pages[i]); if (unlikely(!page)) continue; - /* - * this can only trigger if nr_found == 1, making livelock - * a non issue. - */ - if (unlikely(page == RADIX_TREE_RETRY)) + if (radix_tree_deref_retry(page)) goto restart; if (!page_cache_get_speculative(page)) @@ -1029,6 +1023,9 @@ find_page: goto page_not_up_to_date; if (!trylock_page(page)) goto page_not_up_to_date; + /* Did it get truncated before we got the lock? */ + if (!page->mapping) + goto page_not_up_to_date_locked; if (!mapping->a_ops->is_partially_uptodate(page, desc, offset)) goto page_not_up_to_date_locked; @@ -1563,8 +1560,10 @@ retry_find: goto no_cached_page; } - if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags)) + if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags)) { + page_cache_release(page); return ret | VM_FAULT_RETRY; + } /* Did it get truncated? */ if (unlikely(page->mapping != mapping)) { |