loadpin: stop using bdevname

Use the %pg format specifier to save on stack consuption and code size.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220512062014.1826835-1-hch@lst.de

diff --git a/security/loadpin/loadpin.c b/security/loadpin/loadpin.c
index b12f7d986b1e3bdb04c0c63a36bd200280048802..ad4e6756c03863df854f0b85625a3da7d45082f0 100644 (file)
--- a/security/loadpin/loadpin.c
+++ b/security/loadpin/loadpin.c
@@ -78,11 +78,8 @@ static void check_pinning_enforcement(struct super_block *mnt_sb)
         * device, allow sysctl to change modes for testing.
         */
        if (mnt_sb->s_bdev) {
-               char bdev[BDEVNAME_SIZE];
-
                ro = bdev_read_only(mnt_sb->s_bdev);
-               bdevname(mnt_sb->s_bdev, bdev);
-               pr_info("%s (%u:%u): %s\n", bdev,
+               pr_info("%pg (%u:%u): %s\n", mnt_sb->s_bdev,
                        MAJOR(mnt_sb->s_bdev->bd_dev),
                        MINOR(mnt_sb->s_bdev->bd_dev),
                        ro ? "read-only" : "writable");