hostfs: Do not propagate hostfs parameter to kernel

This parameter is UML specific and is unknown to kernel. It should not
be propagated to kernel, otherwise it will be passed to user space as
an environment option by kernel with a warning like:

Unknown kernel command line parameters "hostfs=/foo", will be passed to user space.

Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20241011040441.1586345-7-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 6d1cf2436ead68a874913ef8508a03afd9bc419c..8d47c6b70c9f716e14295185c63106a7974241d3 100644 (file)
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -57,6 +57,7 @@ static int __init hostfs_args(char *options, int *add)
 {
        char *ptr;
 
+       *add = 0;
        ptr = strchr(options, ',');
        if (ptr != NULL)
                *ptr++ = '\0';