um: Do not propagate dtb 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 "dtb=/foo", will be passed to user space.

Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20241011040441.1586345-5-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/arch/um/kernel/dtb.c b/arch/um/kernel/dtb.c
index 4954188a6a0908363654d541f6a2faeb36bbe651..73369446ed1efc692d98b607a1d19b5e9ffdf0af 100644 (file)
--- a/arch/um/kernel/dtb.c
+++ b/arch/um/kernel/dtb.c
@@ -31,6 +31,7 @@ void uml_dtb_init(void)
 
 static int __init uml_dtb_setup(char *line, int *add)
 {
+       *add = 0;
        dtb = line;
        return 0;
 }