[LTP] [PATCH v6 1/2] OVL_MNT: add helpers to setup overlayfs mountpoint

[Petr Vorel <pvorel@suse.cz>]

Hi Murphy,

> Define constraints of needed overlayfs dirs;
> create_overlay_dirs() to create lower/upper/work dirs;
> mount_overlay() to mount overlayfs;
> SAFE_MOUNT_OVERLAY macro to mount overlayfs safely, tst_brk TCONF
> if mount fail with errno ENODEV;
> TST_MOUNT_OVERLAY  macro to mount overlayfs and return 0 if succeeds;

> Suggested-by: Petr Vorel <pvorel@suse.cz>
> Suggested-by: Amir Goldstein <amir73il@gmail.com>
> Reviewed-by: Amir Goldstein <amir73il@gmail.com>
> Signed-off-by: Murphy Zhou <xzhou@redhat.com>
Acked-by: Petr Vorel <pvorel@suse.cz>

with tiny change not initialize ret (no need as it's initialized by mount()).

Kind regards,
Petr

diff --git lib/tst_fs_setup.c lib/tst_fs_setup.c
index 32a6218e3..54ea37077 100644
--- lib/tst_fs_setup.c
+++ lib/tst_fs_setup.c
@@ -26,7 +26,7 @@ void create_overlay_dirs(void)
 
 int mount_overlay(const char *file, const int lineno, int skip)
 {
-	int ret = 0;
+	int ret;
 
 	create_overlay_dirs();
 	ret = mount("overlay", OVL_MNT, "overlay", 0,