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Donenfeld" , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Matthew Wilcox , Ingo Molnar , Will Deacon , Boqun Feng , Waiman Long , Dennis Zhou , Tejun Heo , Christoph Lameter , "Paul E. McKenney" , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Uladzislau Rezki , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang , Onur =?iso-8859-1?Q?=D6zkan?= , Kees Cook , Joel Granados , Anna-Maria Behnsen , Thomas Gleixner , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , Mike Rapoport , "Liam R. Howlett" , Lorenzo Stoakes , Vlastimil Babka , Jann Horn , Pedro Falcato , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , Eugenio =?iso-8859-1?Q?P=E9rez?= , Sebastian Andrzej Siewior , Clark Williams , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, wireguard@lists.zx2c4.com, netdev@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, rcu@vger.kernel.org, virtualization@lists.linux.dev, linux-rt-devel@lists.linux.dev, llvm@lists.linux.dev, Yury Norov Subject: Re: [PATCH 01/17] locking/mutex: assert static storage for DEFINE_MUTEX() Message-ID: References: <20260915030336.1192299-1-ynorov@nvidia.com> <20260915030336.1192299-2-ynorov@nvidia.com> <20260915082300.GV4121339@noisy.programming.kicks-ass.net> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260915082300.GV4121339@noisy.programming.kicks-ass.net> X-ClientProxiedBy: MN0PR03CA0021.namprd03.prod.outlook.com (2603:10b6:208:52f::35) To LV3PR12MB9356.namprd12.prod.outlook.com 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 rkpjdh0I wPtzPfRYQ6zKCbA3qRfMLQi/uNdJK2xd/oENGVxhtDpmodAlJP+jGEiEpJFbjXFtgu+6HI5iGa+mIMXKurZjh0/CrHQQa2pkVJnfOLfq9SkTJWVDpWJqSjp3WMzTDWnMv723tiqDhda+5fGuK4EJT64HHCfCt3CpiFmQLqd4oh6DFBqDr3EPvJ4fGQjdaps8j56qlR1Q+vGIHU8wX61XPbkD5jcFaYUi8pe4k16N3GLnOBkwIcTXH9dE4S7G2gZkCX9u9RlSQq+XSMAWTDvz0ASurgzftRF7NN8djX3tptfthZGnTfry2pOFo1bgWbKxIOkwAsOr8uzl52a5lbiSmJ3dGatH/kFPWPltOOTrsARB1WgQAf/ztHmIIbFmSVa6KW7Zqzjv7VZSbEezMiFdTHJgogxYjPzsLzi9aZxAHbsb7+4+0Z1xYOHPwoQgKlYQqDChCBzp8r6cHdGRLLnGlzt3vzqbIr0VmMHY9FKRG+SMLqiAExtTfsJV6Yv1TzkhQbMHNPpwZy25di53T10wKBwzKl0mmBZ19PK9Y7zGQ2bqKAq51lmmC8zJxiqmsTRqSgyDYvK5jTdXRkzhI1tVCipH9AgwId3TMMhLh3rxH42eHqas= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Sep 15, 2026 at 10:23:00AM +0200, Peter Zijlstra wrote: > On Mon, Sep 14, 2026 at 11:03:19PM -0400, Yury Norov wrote: > > DEFINE_MUTEX() uses a static lock initializer whose lockdep class key > > requires a persistent object address. Reject automatic local declarations > > with ASSERT_STATIC_STORAGE(), in both the regular and PREEMPT_RT variants. > > Align the VMA and memblock tools stubs with the kernel declaration. > > > > The two automatic mutexes in the WireGuard allowedips selftests already > > call mutex_init(). Replace their redundant static initializers with plain > > struct mutex declarations. > > > > Assisted-by: OpenAI Codex > > Signed-off-by: Yury Norov > > --- > > drivers/net/wireguard/selftest/allowedips.c | 4 ++-- > > include/linux/mutex.h | 7 +++++-- > > tools/testing/memblock/linux/mutex.h | 8 ++++++-- > > tools/testing/vma/include/dup.h | 5 ++++- > > 4 files changed, 17 insertions(+), 7 deletions(-) > > > > diff --git a/drivers/net/wireguard/selftest/allowedips.c b/drivers/net/wireguard/selftest/allowedips.c > > index 3e857e6fb627..ecb2908228e7 100644 > > --- a/drivers/net/wireguard/selftest/allowedips.c > > +++ b/drivers/net/wireguard/selftest/allowedips.c > > @@ -257,7 +257,7 @@ static __init bool randomized_test(void) > > u8 ip[16], mutate_mask[16], mutated[16]; > > struct wg_peer **peers, *peer; > > struct horrible_allowedips h; > > - DEFINE_MUTEX(mutex); > > + struct mutex mutex; > > struct allowedips t; > > bool ret = false; > > > > @@ -499,7 +499,7 @@ bool __init wg_allowedips_selftest(void) > > struct allowedips_node *iter_node; > > bool success = false; > > struct allowedips t; > > - DEFINE_MUTEX(mutex); > > + struct mutex mutex; > > struct in6_addr ip; > > size_t i = 0, count = 0; > > __be64 part; > > This should probably be a separate patch. > > > diff --git a/include/linux/mutex.h b/include/linux/mutex.h > > index 734048c02f4f..2f2d95f3097c 100644 > > --- a/include/linux/mutex.h > > +++ b/include/linux/mutex.h > > @@ -11,6 +11,7 @@ > > #ifndef __LINUX_MUTEX_H > > #define __LINUX_MUTEX_H > > > > +#include > > #include > > #include > > #include > > @@ -84,7 +85,8 @@ do { \ > > __DEP_MAP_MUTEX_INITIALIZER(lockname) } > > > > #define DEFINE_MUTEX(mutexname) \ > > - struct mutex mutexname = __MUTEX_INITIALIZER(mutexname) > > + struct mutex mutexname = __MUTEX_INITIALIZER(mutexname); \ > > + ASSERT_STATIC_STORAGE(mutexname) > > My tree no has ASSERT_STATIC_STORAGE. Please repost when that lands? It's on top of: https://lore.kernel.org/all/20260911221444.1523311-1-ynorov@nvidia.com/ Check the cover letter for more details.