linux-kernel - [PATCH v2 3/8] scripts/Makefile.asm-headers: pass USED

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Message-ID: <C997B2D86EB526D5+4bc4efa1739f38c14463918474e8bfb3d8071041.1760463245.git.tanyuan@tinylab.org>
Date: Wed, 15 Oct 2025 14:18:08 +0800
From: Yuan Tan <tanyuan@...ylab.org>
To: arnd@...db.de,
	masahiroy@...nel.org,
	nathan@...nel.org,
	palmer@...belt.com,
	linux-kbuild@...r.kernel.org,
	linux-riscv@...ts.infradead.org
Cc: linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	i@...kray.me,
	tanyuan@...ylab.org,
	falcon@...ylab.org,
	ronbogo@...look.com,
	z1652074432@...il.com,
	lx24@....ynu.edu.cn
Subject: [PATCH v2 3/8] scripts/Makefile.asm-headers: pass USED_SYSCALLS to syscalltbl.sh

From: Yuhang Zheng <z1652074432@...il.com>

Include auto.conf in asm-headers and pass CONFIG_USED_SYSCALLS to
syscalltbl.sh when CONFIG_TRIM_UNUSED_SYSCALLS is enabled.

Signed-off-by: Yuhang Zheng <z1652074432@...il.com>
Signed-off-by: Yuan Tan <tanyuan@...ylab.org>
Signed-off-by: Zhangjin Wu <falcon@...ylab.org>
---
 scripts/Makefile.asm-headers | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/Makefile.asm-headers b/scripts/Makefile.asm-headers
index 8a4856e74180..0ae82c6a2a15 100644
--- a/scripts/Makefile.asm-headers
+++ b/scripts/Makefile.asm-headers
@@ -13,6 +13,8 @@
 PHONY := all
 all:
 
+include $(objtree)/include/config/auto.conf
+
 src := $(srctree)/$(subst /generated,,$(obj))
 
 syscall_abis_32  += common,32
@@ -68,6 +70,8 @@ quiet_cmd_systbl = SYSTBL  $@
       cmd_systbl = $(CONFIG_SHELL) $(systbl) \
 		   $(if $(systbl-args-$*),$(systbl-args-$*),$(systbl-args)) \
 		   --abis $(subst $(space),$(comma),$(strip $(syscall_abis_$*))) \
+		   $(if $(CONFIG_TRIM_UNUSED_SYSCALLS), \
+		   --used-syscalls=$(subst $(space),$(comma),$(strip $(CONFIG_USED_SYSCALLS)))) \
 		   $< $@
 
 all: $(generic-y) $(syscall-y)
-- 
2.43.0