[PATCH] clean up kernel messages

Arrange for all kernel printks to be no-ops.  Only available if
CONFIG_EMBEDDED.

This patch saves about 375k on my laptop config and nearly 100k on minimal
configs.

Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 42dca393b94..40d286d1d11 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -275,6 +275,17 @@ config KALLSYMS_EXTRA_PASS
            reported.  KALLSYMS_EXTRA_PASS is only a temporary workaround while
            you wait for kallsyms to be fixed.
 
+
+config PRINTK
+        default y
+        bool "Enable support for printk" if EMBEDDED
+        help
+          This option enables normal printk support. Removing it
+          eliminates most of the message strings from the kernel image
+          and makes the kernel more or less silent. As this makes it
+          very difficult to diagnose system problems, saying N here is
+          strongly discouraged.
+
 config BUG
         bool "BUG() support" if EMBEDDED
         default y