tinyconfig: enable CONFIG_LD_DEAD_CODE_DATA_ELIMINATION

This CONFIG option, if supported by the architecture, helps reduce the
size of vmlinux.

For example, the size of vmlinux with ARCH=arm tinyconfig decreases as
follows:

   text	   data	    bss	    dec	    hex	filename
 631684	 104500	  18176	 754360	  b82b8	vmlinux.before
 455316	  93404	  15472	 564192	  89be0	vmlinux.after

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/kernel/configs/tiny.config b/kernel/configs/tiny.config
index b753695..5dd0f0a 100644 (file)
--- a/kernel/configs/tiny.config
+++ b/kernel/configs/tiny.config
@@ -2,3 +2,4 @@ CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_KERNEL_XZ=y
 CONFIG_SLUB=y
 CONFIG_SLUB_TINY=y
+CONFIG_LD_DEAD_CODE_DATA_ELIMINATION=y