udf: possible null pointer dereference while load_partition

[powerpc.git] / fs / sysv / dir.c

diff --git a/fs/sysv/dir.c b/fs/sysv/dir.c
index 8c66e92..e566b38 100644 (file)
--- a/fs/sysv/dir.c
+++ b/fs/sysv/dir.c
@@ -53,25 +53,16 @@ static int dir_commit_chunk(struct page *page, unsigned from, unsigned to)
 static struct page * dir_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);
-       if (!IS_ERR(page)) {
-               wait_on_page_locked(page);
+       struct page *page = read_mapping_page(mapping, n, NULL);
+       if (!IS_ERR(page))
                kmap(page);
-               if (!PageUptodate(page))
-                       goto fail;
-       }
        return page;
-
-fail:
-       dir_put_page(page);
-       return ERR_PTR(-EIO);
 }
 
 static int sysv_readdir(struct file * filp, void * dirent, filldir_t filldir)
 {
        unsigned long pos = filp->f_pos;
-       struct inode *inode = filp->f_dentry->d_inode;
+       struct inode *inode = filp->f_path.dentry->d_inode;
        struct super_block *sb = inode->i_sb;
        unsigned offset = pos & ~PAGE_CACHE_MASK;
        unsigned long n = pos >> PAGE_CACHE_SHIFT;
@@ -253,8 +244,7 @@ int sysv_delete_entry(struct sysv_dir_entry *de, struct page *page)
 
        lock_page(page);
        err = mapping->a_ops->prepare_write(NULL, page, from, to);
-       if (err)
-               BUG();
+       BUG_ON(err);
        de->inode = 0;
        err = dir_commit_chunk(page, from, to);
        dir_put_page(page);
@@ -353,8 +343,7 @@ void sysv_set_link(struct sysv_dir_entry *de, struct page *page,
 
        lock_page(page);
        err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
-       if (err)
-               BUG();
+       BUG_ON(err);
        de->inode = cpu_to_fs16(SYSV_SB(inode->i_sb), inode->i_ino);
        err = dir_commit_chunk(page, from, to);
        dir_put_page(page);