Hi Andrew, After merging the akpm-current tree, today's linux-next build (powerpc ppc64_defconfig) failed like this: mm/page-writeback.c: In function 'account_page_cleared': mm/page-writeback.c:2122:23: error: 'struct address_space' has no member named 'backing_dev_info' dec_bdi_stat(mapping->backing_dev_info, ^ Caused by commit d475bc581640 ("page_writeback: cleanup mess around cancel_dirty_page()") (hmm, that commit has no Signed-off-by from Andrew?) interacting with commit b83ae6d42143 ("fs: remove mapping->backing_dev_info") from the block tree. I have applied the following fix patch: From: Stephen Rothwell Date: Wed, 21 Jan 2015 18:23:41 +1100 Subject: [PATCH] fs: remove mapping->backing_dev_info fix Signed-off-by: Stephen Rothwell --- mm/page-writeback.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/page-writeback.c b/mm/page-writeback.c index a8397a6923be..ab922616e522 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2119,7 +2119,7 @@ void account_page_cleared(struct page *page, struct address_space *mapping) { if (mapping_cap_account_dirty(mapping)) { dec_zone_page_state(page, NR_FILE_DIRTY); - dec_bdi_stat(mapping->backing_dev_info, + dec_bdi_stat(inode_to_bdi(mapping->host), BDI_RECLAIMABLE); task_io_account_cancelled_write(PAGE_CACHE_SIZE); } -- 2.1.4 -- Cheers, Stephen Rothwell sfr@canb.auug.org.au