[PATCH] zram: ZRAM_DEF_COMP should depend on ZRAM

[Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>]

When Compressed RAM block device support is disabled, the
CONFIG_ZRAM_DEF_COMP symbol still ends up in the generated config file:

    CONFIG_ZRAM_DEF_COMP="unset-value"

While this causes no real harm, avoid polluting the config file by
adding a dependency on ZRAM.

Fixes: 917a59e81c342f47 ("zram: introduce custom comp backends API")
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
 drivers/block/zram/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig
index 6aea609b795c2f36..402b7b1758632807 100644
--- a/drivers/block/zram/Kconfig
+++ b/drivers/block/zram/Kconfig
@@ -94,6 +94,7 @@ endchoice
 
 config ZRAM_DEF_COMP
 	string
+	depends on ZRAM
 	default "lzo-rle" if ZRAM_DEF_COMP_LZORLE
 	default "lzo" if ZRAM_DEF_COMP_LZO
 	default "lz4" if ZRAM_DEF_COMP_LZ4
-- 
2.34.1