From: Paolo 'Blaisorblade' Giarrusso Use this: .set_page_dirty = __set_page_dirty_nobuffers, We already dropped the inclusion of , and we don't have a backing block device for this FS. "Without having looked at it, I'm sure that hostfs does not use buffer_heads. So setting your ->set_page_dirty a_op to point at __set_page_dirty_nobuffers() is a reasonable thing to do - it'll provide a slight speedup." This speedup is one less spinlock held and one less conditional branch, which isn't bad. Signed-off-by: Paolo 'Blaisorblade' Giarrusso Signed-off-by: Andrew Morton --- fs/hostfs/hostfs_kern.c | 2 +- 1 files changed, 1 insertion(+), 1 deletion(-) diff -puN fs/hostfs/hostfs_kern.c~uml-hostfs-avoid-buffers fs/hostfs/hostfs_kern.c --- 25/fs/hostfs/hostfs_kern.c~uml-hostfs-avoid-buffers 2005-04-26 04:25:26.930123320 -0700 +++ 25-akpm/fs/hostfs/hostfs_kern.c 2005-04-26 04:25:26.934122712 -0700 @@ -521,7 +521,7 @@ int hostfs_commit_write(struct file *fil static struct address_space_operations hostfs_aops = { .writepage = hostfs_writepage, .readpage = hostfs_readpage, -/* .set_page_dirty = __set_page_dirty_nobuffers, */ + .set_page_dirty = __set_page_dirty_nobuffers, .prepare_write = hostfs_prepare_write, .commit_write = hostfs_commit_write }; _