# \[PATCH 4.9 140/207\] m68k: set a default value for MEMORY\_RESERVE

- From: Greg Kroah-Hartman \<gregkh@linuxfoundation.org\>
- Date: 2021-11-24 12:22:39 
- List: stable
- Page: https://ratatoskr.run/stable/2021/11/1584055
- Thread: https://ratatoskr.run/stable/2021/11/1583929/t/2.md

```text
From: Randy Dunlap <rdunlap@infradead.org>

[ Upstream commit 1aaa557b2db95c9506ed0981bc34505c32d6b62b ]

'make randconfig' can produce a .config file with
"CONFIG_MEMORY_RESERVE=" (no value) since it has no default.
When a subsequent 'make all' is done, kconfig restarts the config
and prompts for a value for MEMORY_RESERVE. This breaks
scripting/automation where there is no interactive user input.

Add a default value for MEMORY_RESERVE. (Any integer value will
work here for kconfig.)

Fixes a kconfig warning:

.config:214:warning: symbol value '' invalid for MEMORY_RESERVE
* Restart config...
Memory reservation (MiB) (MEMORY_RESERVE) [] (NEW)

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") # from beginning of git history
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: <redacted>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/m68k/Kconfig.machine | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/m68k/Kconfig.machine b/arch/m68k/Kconfig.machine
index 2a5c7abb2896e..f622c3ccafc31 100644
--- a/arch/m68k/Kconfig.machine
+++ b/arch/m68k/Kconfig.machine
@@ -184,6 +184,7 @@ config INIT_LCD
 config MEMORY_RESERVE
 	int "Memory reservation (MiB)"
 	depends on (UCSIMM || UCDIMM)
+	default 0
 	help
 	  Reserve certain memory regions on 68x328 based boards.
 
-- 
2.33.0



```
