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h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Spnm0O6n64qhlr2XGPvA2PUtVAcdwbpZIioj6ZLdH58=; b=+mZHWZCfs53I6rkudWs7kJsjE+ppto48K/GH4/OLzxwP9fpW+fkVHE4oQBRFslcreip6cR CEswKUxpUc2uC0DQ== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id DA0CB13AE9; Thu, 29 Jul 2021 13:21:45 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id qOWmNGmrAmF9AwAAMHmgww (envelope-from ); Thu, 29 Jul 2021 13:21:45 +0000 From: Vlastimil Babka To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Christoph Lameter , David Rientjes , Pekka Enberg , Joonsoo Kim Cc: Mike Galbraith , Sebastian Andrzej Siewior , Thomas Gleixner , Mel Gorman , Jesper Dangaard Brouer , Jann Horn , Vlastimil Babka Subject: [PATCH v3 30/35] mm: slub: Make object_map_lock a raw_spinlock_t Date: Thu, 29 Jul 2021 15:21:27 +0200 Message-Id: <20210729132132.19691-31-vbabka@suse.cz> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210729132132.19691-1-vbabka@suse.cz> References: <20210729132132.19691-1-vbabka@suse.cz> MIME-Version: 1.0 Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=suse.cz header.s=susede2_rsa header.b=FhpC21ru; dkim=pass header.d=suse.cz header.s=susede2_ed25519 header.b=+mZHWZCf; spf=pass (imf04.hostedemail.com: domain of vbabka@suse.cz designates 195.135.220.28 as permitted sender) smtp.mailfrom=vbabka@suse.cz; dmarc=none X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 022DE50000AE X-Stat-Signature: 7tkprism8h6ndungxgi93toxj8ksty8o X-HE-Tag: 1627564906-810768 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Sebastian Andrzej Siewior The variable object_map is protected by object_map_lock. The lock is always acquired in debug code and within already atomic context Make object_map_lock a raw_spinlock_t. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Vlastimil Babka --- mm/slub.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/mm/slub.c b/mm/slub.c index dbb74dbe1c1e..1ee3ef7a1d3b 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -438,7 +438,7 @@ static inline bool cmpxchg_double_slab(struct kmem_cache *s, struct page *page, #ifdef CONFIG_SLUB_DEBUG static unsigned long object_map[BITS_TO_LONGS(MAX_OBJS_PER_PAGE)]; -static DEFINE_SPINLOCK(object_map_lock); +static DEFINE_RAW_SPINLOCK(object_map_lock); static void __fill_map(unsigned long *obj_map, struct kmem_cache *s, struct page *page) @@ -483,7 +483,7 @@ static unsigned long *get_map(struct kmem_cache *s, struct page *page) { VM_BUG_ON(!irqs_disabled()); - spin_lock(&object_map_lock); + raw_spin_lock(&object_map_lock); __fill_map(object_map, s, page); @@ -493,7 +493,7 @@ static unsigned long *get_map(struct kmem_cache *s, struct page *page) static void put_map(unsigned long *map) __releases(&object_map_lock) { VM_BUG_ON(map != object_map); - spin_unlock(&object_map_lock); + raw_spin_unlock(&object_map_lock); } static inline unsigned int size_from_object(struct kmem_cache *s)