linux-kernel - [PATCH -next v5 14/22] arm64/ptrace: Refactor syscall_trace

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Message-ID: <20241206101744.4161990-15-ruanjinjie@huawei.com>
Date: Fri, 6 Dec 2024 18:17:36 +0800
From: Jinjie Ruan <ruanjinjie@...wei.com>
To: <catalin.marinas@....com>, <will@...nel.org>, <oleg@...hat.com>,
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Subject: [PATCH -next v5 14/22] arm64/ptrace: Refactor syscall_trace_exit()

The generic entry syscall_exit_work() use the input
syscall work flag.

In preparation for moving arm64 over to the generic entry
code, refactor syscall_trace_exit() to also pass thread flags.

No functional changes.

Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
 arch/arm64/include/asm/syscall.h | 2 +-
 arch/arm64/kernel/ptrace.c       | 4 +---
 arch/arm64/kernel/syscall.c      | 3 ++-
 3 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h
index 6b71d335c224..925a257145f9 100644
--- a/arch/arm64/include/asm/syscall.h
+++ b/arch/arm64/include/asm/syscall.h
@@ -86,6 +86,6 @@ static inline int syscall_get_arch(struct task_struct *task)
 }
 
 int syscall_trace_enter(struct pt_regs *regs, long syscall, unsigned long flags);
-void syscall_trace_exit(struct pt_regs *regs);
+void syscall_trace_exit(struct pt_regs *regs, unsigned long flags);
 
 #endif	/* __ASM_SYSCALL_H */
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c
index 48bb813e0ef6..bb994d668d74 100644
--- a/arch/arm64/kernel/ptrace.c
+++ b/arch/arm64/kernel/ptrace.c
@@ -2384,10 +2384,8 @@ int syscall_trace_enter(struct pt_regs *regs, long syscall, unsigned long flags)
 	return regs->syscallno;
 }
 
-void syscall_trace_exit(struct pt_regs *regs)
+void syscall_trace_exit(struct pt_regs *regs, unsigned long flags)
 {
-	unsigned long flags = read_thread_flags();
-
 	audit_syscall_exit(regs);
 
 	if (flags & _TIF_SYSCALL_TRACEPOINT)
diff --git a/arch/arm64/kernel/syscall.c b/arch/arm64/kernel/syscall.c
index eb328ee1423c..064dc114fb9b 100644
--- a/arch/arm64/kernel/syscall.c
+++ b/arch/arm64/kernel/syscall.c
@@ -143,7 +143,8 @@ static void el0_svc_common(struct pt_regs *regs, int scno, int sc_nr,
 	}
 
 trace_exit:
-	syscall_trace_exit(regs);
+	flags = read_thread_flags();
+	syscall_trace_exit(regs, flags);
 }
 
 void do_el0_svc(struct pt_regs *regs)
-- 
2.34.1