bdi_register: add __printf verification, fix arg mismatch

__printf is useful to verify format and arguments.

Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Alex Elder <elder@inktank.com>

diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index fcda1c7..1a14400 100644 (file)
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -842,7 +842,7 @@ static int ceph_register_bdi(struct super_block *sb,
                fsc->backing_dev_info.ra_pages =
                        default_backing_dev_info.ra_pages;
 
-       err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%d",
+       err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld",
                           atomic_long_inc_return(&bdi_seq));
        if (!err)
                sb->s_bdi = &fsc->backing_dev_info;

diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index 2a9a9ab..12731a1 100644 (file)
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -114,6 +114,7 @@ struct backing_dev_info {
 int bdi_init(struct backing_dev_info *bdi);
 void bdi_destroy(struct backing_dev_info *bdi);
 
+__printf(3, 4)
 int bdi_register(struct backing_dev_info *bdi, struct device *parent,
                const char *fmt, ...);
 int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev);