linux-kernel - [PATCH -next v6 09/10] entry: Add has_syscall

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Message-ID: <20250916082611.2972008-10-ruanjinjie@huawei.com>
Date: Tue, 16 Sep 2025 16:26:10 +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>,
	<kees@...nel.org>, <wad@...omium.org>, <charlie@...osinc.com>,
	<macro@...am.me.uk>, <deller@....de>, <akpm@...ux-foundation.org>,
	<ldv@...ace.io>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
CC: <ruanjinjie@...wei.com>
Subject: [PATCH -next v6 09/10] entry: Add has_syscall_work() helper

Add has_syscall_work() helper to facilitate reuse
of this function in other places.

No functional changes.

Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
 include/linux/entry-common.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/include/linux/entry-common.h b/include/linux/entry-common.h
index cd6dacb2d8bf..e0f94e937e84 100644
--- a/include/linux/entry-common.h
+++ b/include/linux/entry-common.h
@@ -44,6 +44,11 @@
 				 SYSCALL_WORK_SYSCALL_EXIT_TRAP	|	\
 				 ARCH_SYSCALL_WORK_EXIT)
 
+static inline bool has_syscall_work(unsigned long work)
+{
+	return unlikely(work & SYSCALL_WORK_ENTER);
+}
+
 /**
  * syscall_enter_from_user_mode_prepare - Establish state and enable interrupts
  * @regs:	Pointer to currents pt_regs
@@ -91,7 +96,7 @@ 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)
+	if (has_syscall_work(work))
 		syscall = syscall_trace_enter(regs, syscall, work);
 
 	return syscall;
-- 
2.34.1