entry: Remove unused syscall argument from syscall_trace_enter()

The 'syscall' argument of 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@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260128031934.3906955-2-ruanjinjie@huawei.com

Author: ruanjinjie-eng

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;
 }

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