From: Masahiro Yamada <masahiroy@kernel.org>
To: linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Masahiro Yamada <masahiroy@kernel.org>
Subject: [PATCH 1/2] tinyconfig: enable CONFIG_LD_DEAD_CODE_DATA_ELIMINATION
Date: Mon, 26 May 2025 18:07:51 +0900 [thread overview]
Message-ID: <20250526090815.416922-1-masahiroy@kernel.org> (raw)
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>
---
kernel/configs/tiny.config | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/configs/tiny.config b/kernel/configs/tiny.config
index b753695c5a8f..5dd0f0a34a73 100644
--- 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
--
2.43.0
next reply other threads:[~2025-05-26 9:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-26 9:07 Masahiro Yamada [this message]
2025-05-26 9:07 ` [PATCH 2/2] kbuild: link lib-y objects to vmlinux forcibly even when CONFIG_MODULES=n Masahiro Yamada
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