init: remove CONFIG_INIT_FALLBACK

CONFIG_INIT_FALLBACK adds config bloat without an obvious use case that
makes it worth keeping around.  Delete it.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Chuck Ebbert <cebbert.lkml@gmail.com>
Cc: Frank Rowand <frowand.list@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rob Landley <rob@landley.net>
Cc: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 0 insertions, 21 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 1354ac09b516..058e3671fa11 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1287,22 +1287,6 @@ source "usr/Kconfig"
 
 endif
 
-config INIT_FALLBACK
-        bool "Fall back to defaults if init= parameter is bad"
-        default y
-        help
-          If enabled, the kernel will try the default init binaries if an
-          explicit request from the init= parameter fails.
-
-          This can have unexpected effects.  For example, booting
-          with init=/sbin/kiosk_app will run /sbin/init or even /bin/sh
-          if /sbin/kiosk_app cannot be executed.
-
-          The default value of Y is consistent with historical behavior.
-          Selecting N is likely to be more appropriate for most uses,
-          especially on kiosks and on kernels that are intended to be
-          run under the control of a script.
-
 config CC_OPTIMIZE_FOR_SIZE
         bool "Optimize for size"
         help
diff --git a/init/main.c b/init/main.c
index 179ada15d08a..6f0f1c5ff8cc 100644
--- a/init/main.c
+++ b/init/main.c
@@ -953,13 +953,8 @@ static int __ref kernel_init(void *unused)
                 ret = run_init_process(execute_command);
                 if (!ret)
                         return 0;
-#ifndef CONFIG_INIT_FALLBACK
                 panic("Requested init %s failed (error %d).",
                       execute_command, ret);
-#else
-                pr_err("Failed to execute %s (error %d).  Attempting defaults...\n",
-                       execute_command, ret);
-#endif
         }
         if (!try_to_run_init_process("/sbin/init") ||
             !try_to_run_init_process("/etc/init") ||