From: Daniel Palmer Date: Wed, 16 Apr 2025 11:42:40 +0000 (+0900) Subject: m68k: Enable dead code elimination X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4fbdd56edf1f0b3e338c90a011bbae1a677ac884;p=thirdparty%2Fkernel%2Fstable.git m68k: Enable dead code elimination Allow the experimental dead code elimination config to be enabled. For my 68000 nommu config this frees up a few hundred K of memory so seems worth while. Boot and build tested on nommu and mmu enabled configs. Before: Memory: 5388K/8192K available (1986K kernel code, 114K rwdata, 244K rodata, 92K init, 41K bss, 2624K reserved, 0K cma-reserved) After Memory: 5684K/8192K available (1714K kernel code, 112K rwdata, 228K rodata, 92K init, 37K bss, 2328K reserved, 0K cma-reserved) Signed-off-by: Daniel Palmer Acked-by: Greg Ungerer Tested-by: Finn Thain Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/20250416114240.2929832-1-daniel@0x0f.com Signed-off-by: Geert Uytterhoeven --- diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index eb5bb6d36899..11835eb59d94 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -32,6 +32,7 @@ config M68K select HAVE_ASM_MODVERSIONS select HAVE_DEBUG_BUGVERBOSE select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_HAS_NO_UNALIGNED + select HAVE_LD_DEAD_CODE_DATA_ELIMINATION select HAVE_MOD_ARCH_SPECIFIC select HAVE_UID16 select MMU_GATHER_NO_RANGE if MMU