tree 52e4328b571478f445f11b40348ab5f4a24472e5
parent d5d7395cccef836711cc1863c0b73b8c1cc65776
author Rasmus Villemoes <rasmus.villemoes@prevas.dk> 1582811770 +0000
committer Tom Rini <trini@konsulko.com> 1587737399 -0400

env: remove callback.o for an SPL build

env.h says this about about callback declarations (U_BOOT_ENV_CALLBACK):

 * For SPL these are silently dropped to reduce code size, since environment
 * callbacks are not supported with SPL.

So env_callback_init() does a lot of work to not find anything in the
guaranteed empty env_clbk list. Drop callback.o entirely from the link
and stub out the only public function defined in callback.o. This cuts
about 600 bytes from the SPL on my ppc build.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Simon Glass <sjg@chromium.org>