From: Peter Zijlstra <peterz@infradead.org>
Date: Mon, 22 Sep 2025 13:49:19 +0000 (+0200)
Subject: unwind: Clarify calling context
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=1e74829f36b5db19afc3d17f0a3750e9573710ae;p=thirdparty%2Flinux.git

unwind: Clarify calling context

The get_cookie() function hard relies on IRQs being disabled, but this
isn't immediately obvious when reading the function.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://patch.msgid.link/20250924080119.122507632@infradead.org
---

diff --git a/kernel/unwind/deferred.c b/kernel/unwind/deferred.c
index d2cd3a7fd286d..6395192d7225e 100644
--- a/kernel/unwind/deferred.c
+++ b/kernel/unwind/deferred.c
@@ -79,6 +79,8 @@ static u64 get_cookie(struct unwind_task_info *info)
 {
 	u32 cnt = 1;
 
+	lockdep_assert_irqs_disabled();
+
 	if (info->id.cpu)
 		return info->id.id;