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-rw-r--r--fs/namei.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 1baf1b06fe47..712dfc77793b 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2627,16 +2627,27 @@ int __page_symlink(struct inode *inode, const char *symname, int len,
2627 int err = -ENOMEM; 2627 int err = -ENOMEM;
2628 char *kaddr; 2628 char *kaddr;
2629 2629
2630retry:
2630 page = find_or_create_page(mapping, 0, gfp_mask); 2631 page = find_or_create_page(mapping, 0, gfp_mask);
2631 if (!page) 2632 if (!page)
2632 goto fail; 2633 goto fail;
2633 err = mapping->a_ops->prepare_write(NULL, page, 0, len-1); 2634 err = mapping->a_ops->prepare_write(NULL, page, 0, len-1);
2635 if (err == AOP_TRUNCATED_PAGE) {
2636 page_cache_release(page);
2637 goto retry;
2638 }
2634 if (err) 2639 if (err)
2635 goto fail_map; 2640 goto fail_map;
2636 kaddr = kmap_atomic(page, KM_USER0); 2641 kaddr = kmap_atomic(page, KM_USER0);
2637 memcpy(kaddr, symname, len-1); 2642 memcpy(kaddr, symname, len-1);
2638 kunmap_atomic(kaddr, KM_USER0); 2643 kunmap_atomic(kaddr, KM_USER0);
2639 mapping->a_ops->commit_write(NULL, page, 0, len-1); 2644 err = mapping->a_ops->commit_write(NULL, page, 0, len-1);
2645 if (err == AOP_TRUNCATED_PAGE) {
2646 page_cache_release(page);
2647 goto retry;
2648 }
2649 if (err)
2650 goto fail_map;
2640 /* 2651 /*
2641 * Notice that we are _not_ going to block here - end of page is 2652 * Notice that we are _not_ going to block here - end of page is
2642 * unmapped, so this will only try to map the rest of page, see 2653 * unmapped, so this will only try to map the rest of page, see
@@ -2646,7 +2657,8 @@ int __page_symlink(struct inode *inode, const char *symname, int len,
2646 */ 2657 */
2647 if (!PageUptodate(page)) { 2658 if (!PageUptodate(page)) {
2648 err = mapping->a_ops->readpage(NULL, page); 2659 err = mapping->a_ops->readpage(NULL, page);
2649 wait_on_page_locked(page); 2660 if (err != AOP_TRUNCATED_PAGE)
2661 wait_on_page_locked(page);
2650 } else { 2662 } else {
2651 unlock_page(page); 2663 unlock_page(page);
2652 } 2664 }