init: INITRAMFS_PRESERVE_MTIME should depend on BLK_DEV_INITRD

INITRAMFS_PRESERVE_MTIME is only used in init/initramfs.c and
init/initramfs_test.c.  Hence add a dependency on BLK_DEV_INITRD, to
prevent asking the user about this feature when configuring a kernel
without initramfs support.

Fixes: 1274aea127b2e8c9 ("initramfs: add INITRAMFS_PRESERVE_MTIME Kconfig option")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Martin Wilck <mwilck@suse.com>
Reviewed-by: David Disseldorp <ddiss@suse.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>

diff --git a/init/Kconfig b/init/Kconfig
index 83632025121937527523f5977a493bd3ae24ed9f..096726e9c95c588765aa6b7fd6494f42bb81ffcc 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1497,6 +1497,7 @@ config BOOT_CONFIG_EMBED_FILE
 
 config INITRAMFS_PRESERVE_MTIME
        bool "Preserve cpio archive mtimes in initramfs"
+       depends on BLK_DEV_INITRD
        default y
        help
          Each entry in an initramfs cpio archive carries an mtime value. When