[PATCH] kbuild: drop duplicate CONFIG_LD_DEAD_CODE_DATA_ELIMINATION block

[PATCH] kbuild: drop duplicate CONFIG_LD_DEAD_CODE_DATA_ELIMINATION block

[Ahmad Fatoum]

From: Ahmad Fatoum <a.fatoum@barebox.org>

Commit 48d0d0cc28ed ("kbuild: sync with Linux v6.17") carried over an
upstream hunk that sets up section garbage collection a second time,
so we have the hunk being deleted here in addition to:

  ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
  KBUILD_CPPFLAGS += -fdata-sections -ffunction-sections
  LDFLAGS_barebox += --gc-sections
  LDFLAGS_pbl += --gc-sections
  endif

The upstream hunk is incorrect and incomplete: We have no vmlinux and
KBUILD_CFLAGS_KERNEL doesn't apply to the PBL, unlike KBUILD_CPPFLAGS,
therefore delete the duplicate.

Fixes: 48d0d0cc28ed ("kbuild: sync with Linux v6.17")
Signed-off-by: Ahmad Fatoum <a.fatoum@barebox.org>
---
 Makefile | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/Makefile b/Makefile
index 1a10628f101f..69484534bc6c 100644
--- a/Makefile
+++ b/Makefile
@@ -881,11 +881,6 @@ ifdef CONFIG_ZERO_CALL_USED_REGS
 KBUILD_CFLAGS	+= -fzero-call-used-regs=used-gpr
 endif
 
-ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
-KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
-LDFLAGS_vmlinux += --gc-sections
-endif
-
 # arch Makefile may override CC so keep this after arch Makefile is included
 NOSTDINC_FLAGS += -nostdinc
 
-- 
2.47.3

Re: [PATCH] kbuild: drop duplicate CONFIG_LD_DEAD_CODE_DATA_ELIMINATION block

[Sascha Hauer]

On Mon, 24 Aug 2026 09:28:21 +0200, Ahmad Fatoum wrote:
> Commit 48d0d0cc28ed ("kbuild: sync with Linux v6.17") carried over an
> upstream hunk that sets up section garbage collection a second time,
> so we have the hunk being deleted here in addition to:
> 
>   ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
>   KBUILD_CPPFLAGS += -fdata-sections -ffunction-sections
>   LDFLAGS_barebox += --gc-sections
>   LDFLAGS_pbl += --gc-sections
>   endif
> 
> [...]

Applied, thanks!

[1/1] kbuild: drop duplicate CONFIG_LD_DEAD_CODE_DATA_ELIMINATION block
      https://git.pengutronix.de/cgit/barebox/commit/?id=1efcd5a48848 (link may not be stable)

Best regards,
-- 
Sascha Hauer <s.hauer@pengutronix.de>