On 10/03/2015 12:37 AM, Andrew Morton wrote:

On Fri,  2 Oct 2015 15:35:49 +0200 Vlastimil Babka [off-list ref] wrote:

quoted

--- a/include/linux/shmem_fs.h
+++ b/include/linux/shmem_fs.h

@@ -60,6 +60,12 @@ extern struct page *shmem_read_mapping_page_gfp(struct address_space *mapping,
  extern void shmem_truncate_range(struct inode *inode, loff_t start, loff_t end);
  extern int shmem_unuse(swp_entry_t entry, struct page *page);

+#ifdef CONFIG_SWAP
+extern unsigned long shmem_swap_usage(struct inode *inode);
+extern unsigned long shmem_partial_swap_usage(struct address_space *mapping,
+						pgoff_t start, pgoff_t end);
+#endif

CONFIG_SWAP is wrong, isn't it?  It should be CONFIG_SHMEM if anything.

Yeah, I overlooked this while removing the other ifdefs. Thanks.