[syslinux] [PATCH] check for default subvolid and act accordingly on install

[Jordan Beaver]

This fixes the issue I had come across with the default subvolume not being
set/used on btrfs when isntalling via `extlinux --install /boot/syslinux`.

Signed-off-by: Jordan Beaver <jordan at beaveris.me>
---
 extlinux/main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/extlinux/main.c b/extlinux/main.c
index 09740bd..c3d9612 100644
--- a/extlinux/main.c
+++ b/extlinux/main.c
@@ -1261,6 +1261,9 @@ static const char *find_device_btrfs(const char *path)
     if (!validate_device_btrfs(pfd, dfd))
 	rv = (const char *)devinfo.path; /* It's good! */
 
+	/* check for default subvolume and act accordingly */
+	get_default_subvol("/", subvol);
+
 err:
     if (pfd >= 0)
 	close(pfd);
-- 
2.1.3

-Beaver