nilfs2: simplify nilfs_get_page function
Implementation of nilfs_get_page() is a bit old as below:
- A common read_mapping_page inline function is now available instead
of its read_cache_page use.
- wait_on_page_locked() use in the function is eliminable since
read_cache_page function does the same thing through wait_on_page_read().
- PageUptodate() check is eliminable for the same reason.
This renews nilfs_get_page() based on these points.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c
index 85c89df..d8d183e 100644
--- a/fs/nilfs2/dir.c
+++ b/fs/nilfs2/dir.c
@@ -199,13 +199,10 @@
static struct page *nilfs_get_page(struct inode *dir, unsigned long n)
{
struct address_space *mapping = dir->i_mapping;
- struct page *page = read_cache_page(mapping, n,
- (filler_t *)mapping->a_ops->readpage, NULL);
+ struct page *page = read_mapping_page(mapping, n, NULL);
+
if (!IS_ERR(page)) {
- wait_on_page_locked(page);
kmap(page);
- if (!PageUptodate(page))
- goto fail;
if (!PageChecked(page))
nilfs_check_page(page);
if (PageError(page))