From: Peter Zijlstra <peterz@infradead.org>
Date: Mon, 22 Sep 2025 13:46:00 +0000 (+0200)
Subject: unwind: Simplify unwind_reset_info()
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=52a1ec718b3eb6da29a76d05a662365a997139cc;p=thirdparty%2Fkernel%2Flinux.git

unwind: Simplify unwind_reset_info()

Invert the condition of the first if and make it an early exit to
reduce an indent level for the rest fo the function.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://patch.msgid.link/20250924080118.777916262@infradead.org
---

diff --git a/include/linux/unwind_deferred.h b/include/linux/unwind_deferred.h
index 25f4dffebd1bf..196e12c1449ea 100644
--- a/include/linux/unwind_deferred.h
+++ b/include/linux/unwind_deferred.h
@@ -46,22 +46,22 @@ void unwind_deferred_task_exit(struct task_struct *task);
 static __always_inline void unwind_reset_info(void)
 {
 	struct unwind_task_info *info = &current->unwind_info;
-	unsigned long bits;
+	unsigned long bits = info->unwind_mask;
 
 	/* Was there any unwinding? */
-	if (unlikely(info->unwind_mask)) {
-		bits = info->unwind_mask;
-		do {
-			/* Is a task_work going to run again before going back */
-			if (bits & UNWIND_PENDING)
-				return;
-		} while (!try_cmpxchg(&info->unwind_mask, &bits, 0UL));
-		current->unwind_info.id.id = 0;
-
-		if (unlikely(info->cache)) {
-			info->cache->nr_entries = 0;
-			info->cache->unwind_completed = 0;
-		}
+	if (likely(!bits))
+		return;
+
+	do {
+		/* Is a task_work going to run again before going back */
+		if (bits & UNWIND_PENDING)
+			return;
+	} while (!try_cmpxchg(&info->unwind_mask, &bits, 0UL));
+	current->unwind_info.id.id = 0;
+
+	if (unlikely(info->cache)) {
+		info->cache->nr_entries = 0;
+		info->cache->unwind_completed = 0;
 	}
 }