linux-kernel - [PATCH] fix for "lib/stackdepot: allow users to evict stack traces"

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Message-Id: <20231026223340.333159-1-andrey.konovalov@linux.dev>
Date:   Fri, 27 Oct 2023 00:33:40 +0200
From:   andrey.konovalov@...ux.dev
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Andrey Konovalov <andreyknvl@...il.com>,
        Marco Elver <elver@...gle.com>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>, kasan-dev@...glegroups.com,
        Evgenii Stepanov <eugenis@...gle.com>,
        Oscar Salvador <osalvador@...e.de>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Andrey Konovalov <andreyknvl@...gle.com>
Subject: [PATCH] fix for "lib/stackdepot: allow users to evict stack traces"

From: Andrey Konovalov <andreyknvl@...gle.com>

Commit "lib/stackdepot: allow users to evict stack traces" adds another
user for depot_fetch_stack, which holds a write lock. Thus, we need to
update the lockdep annotation.

Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>
---
 lib/stackdepot.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/stackdepot.c b/lib/stackdepot.c
index 3a8f045696fd..cf707ff32d7d 100644
--- a/lib/stackdepot.c
+++ b/lib/stackdepot.c
@@ -388,7 +388,7 @@ static struct stack_record *depot_fetch_stack(depot_stack_handle_t handle)
 	size_t offset = parts.offset << DEPOT_STACK_ALIGN;
 	struct stack_record *stack;
 
-	lockdep_assert_held_read(&pool_rwlock);
+	lockdep_assert_held(&pool_rwlock);
 
 	if (parts.pool_index > pools_num) {
 		WARN(1, "pool index %d out of bounds (%d) for stack id %08x\n",
-- 
2.25.1