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([2400:4162:2428:2ffe:79a9:b58a:259c:e1fa]) by smtp.googlemail.com with ESMTPSA id d2e1a72fcca58-73bd21e14e9sm10171722b3a.77.2025.04.16.04.42.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Apr 2025 04:42:45 -0700 (PDT) From: Daniel Palmer To: geert@linux-m68k.org, linux-m68k@lists.linux-m68k.org Cc: linux-kernel@vger.kernel.org, Daniel Palmer Subject: [PATCH] m68k: Enable dead code elimination Date: Wed, 16 Apr 2025 20:42:40 +0900 Message-ID: <20250416114240.2929832-1-daniel@0x0f.com> X-Mailer: git-send-email 2.49.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 Reviewed-by: Geert Uytterhoeven Tested-by: Finn Thain --- arch/m68k/Kconfig | 1 + 1 file changed, 1 insertion(+) 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 --=20 2.47.2