linux-kernel - [PATCH v11 01/14] entry: Remove unused syscall in syscall_trace

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Message-ID: <20260128031934.3906955-2-ruanjinjie@huawei.com>
Date: Wed, 28 Jan 2026 11:19:21 +0800
From: Jinjie Ruan <ruanjinjie@...wei.com>
To: <catalin.marinas@....com>, <will@...nel.org>, <oleg@...hat.com>,
	<tglx@...utronix.de>, <peterz@...radead.org>, <luto@...nel.org>,
	<shuah@...nel.org>, <kees@...nel.org>, <wad@...omium.org>,
	<kevin.brodsky@....com>, <deller@....de>, <akpm@...ux-foundation.org>,
	<charlie@...osinc.com>, <ldv@...ace.io>, <mark.rutland@....com>,
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	<thuth@...hat.com>, <ada.coupriediaz@....com>, <broonie@...nel.org>,
	<pengcan@...inos.cn>, <liqiang01@...inos.cn>, <kmal@...k.li>,
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	<richard.weiyang@...il.com>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-kselftest@...r.kernel.org>
CC: <ruanjinjie@...wei.com>
Subject: [PATCH v11 01/14] entry: Remove unused syscall in syscall_trace_enter()

The 'syscall' argument in syscall_trace_enter() is immediately overwritten
before any real use and serves only as a local variable, so drop
the parameter.

No functional change intended.

Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
 include/linux/entry-common.h  | 4 ++--
 kernel/entry/syscall-common.c | 5 ++---
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/include/linux/entry-common.h b/include/linux/entry-common.h
index 87efb38b7081..e4a8287af822 100644
--- a/include/linux/entry-common.h
+++ b/include/linux/entry-common.h
@@ -45,7 +45,7 @@
 				 SYSCALL_WORK_SYSCALL_EXIT_TRAP	|	\
 				 ARCH_SYSCALL_WORK_EXIT)
 
-long syscall_trace_enter(struct pt_regs *regs, long syscall, unsigned long work);
+long syscall_trace_enter(struct pt_regs *regs, unsigned long work);
 
 /**
  * syscall_enter_from_user_mode_work - Check and handle work before invoking
@@ -75,7 +75,7 @@ static __always_inline long syscall_enter_from_user_mode_work(struct pt_regs *re
 	unsigned long work = READ_ONCE(current_thread_info()->syscall_work);
 
 	if (work & SYSCALL_WORK_ENTER)
-		syscall = syscall_trace_enter(regs, syscall, work);
+		syscall = syscall_trace_enter(regs, work);
 
 	return syscall;
 }
diff --git a/kernel/entry/syscall-common.c b/kernel/entry/syscall-common.c
index 940a597ded40..e6237b536d8b 100644
--- a/kernel/entry/syscall-common.c
+++ b/kernel/entry/syscall-common.c
@@ -17,10 +17,9 @@ static inline void syscall_enter_audit(struct pt_regs *regs, long syscall)
 	}
 }
 
-long syscall_trace_enter(struct pt_regs *regs, long syscall,
-				unsigned long work)
+long syscall_trace_enter(struct pt_regs *regs, unsigned long work)
 {
-	long ret = 0;
+	long syscall, ret = 0;
 
 	/*
 	 * Handle Syscall User Dispatch.  This must comes first, since
-- 
2.34.1