diff options
| -rw-r--r-- | mm/page-writeback.c | 7 | ||||
| -rw-r--r-- | mm/shmem.c | 4 |
2 files changed, 9 insertions, 2 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index dd73d29c15a..bba82c414ba 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1149,6 +1149,13 @@ int redirty_page_for_writepage(struct writeback_control *wbc, struct page *page) EXPORT_SYMBOL(redirty_page_for_writepage); /* + * Dirty a page. + * + * For pages with a mapping this should be done under the page lock + * for the benefit of asynchronous memory errors who prefer a consistent + * dirty state. This rule can be broken in some special cases, + * but should be better not to. + * * If the mapping doesn't provide a set_page_dirty a_op, then * just fall through and assume that it wants buffer_heads. */ diff --git a/mm/shmem.c b/mm/shmem.c index 5a0b3d4055f..46936601e37 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1630,8 +1630,8 @@ shmem_write_end(struct file *file, struct address_space *mapping, if (pos + copied > inode->i_size) i_size_write(inode, pos + copied); - unlock_page(page); set_page_dirty(page); + unlock_page(page); page_cache_release(page); return copied; @@ -1968,13 +1968,13 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s iput(inode); return error; } - unlock_page(page); inode->i_mapping->a_ops = &shmem_aops; inode->i_op = &shmem_symlink_inode_operations; kaddr = kmap_atomic(page, KM_USER0); memcpy(kaddr, symname, len); kunmap_atomic(kaddr, KM_USER0); set_page_dirty(page); + unlock_page(page); page_cache_release(page); } if (dir->i_mode & S_ISGID) |