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Miller" , Eric Dumazet , Paolo Abeni , Andy Shevchenko , Rasmus Villemoes , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Valentin Schneider , Tariq Toukan , Gal Pressman , Greg Kroah-Hartman , Heiko Carstens , Barry Song Subject: [PATCH v2 8/8] sched: drop for_each_numa_hop_mask() Date: Wed, 19 Apr 2023 22:19:46 -0700 Message-Id: <20230420051946.7463-9-yury.norov@gmail.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20230420051946.7463-1-yury.norov@gmail.com> References: <20230420051946.7463-1-yury.norov@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1763672073425719110?= X-GMAIL-MSGID: =?utf-8?q?1763672073425719110?= Now that we have for_each_numa_cpu(), for_each_numa_hop_mask() and all related code is a dead code. Drop it. Signed-off-by: Yury Norov --- include/linux/topology.h | 25 ------------------------- kernel/sched/topology.c | 32 -------------------------------- lib/test_bitmap.c | 13 ------------- 3 files changed, 70 deletions(-) diff --git a/include/linux/topology.h b/include/linux/topology.h index 7ebcc886dc76..1225ade33053 100644 --- a/include/linux/topology.h +++ b/include/linux/topology.h @@ -255,7 +255,6 @@ static inline const struct cpumask *cpu_cpu_mask(int cpu) #ifdef CONFIG_NUMA int sched_numa_find_nth_cpu(const struct cpumask *cpus, int cpu, int node); int sched_numa_find_next_cpu(const struct cpumask *cpus, int cpu, int node, unsigned int *hop); -extern const struct cpumask *sched_numa_hop_mask(unsigned int node, unsigned int hops); #else static __always_inline int sched_numa_find_nth_cpu(const struct cpumask *cpus, int cpu, int node) { @@ -267,32 +266,8 @@ int sched_numa_find_next_cpu(const struct cpumask *cpus, int cpu, int node, unsi { return find_next_bit(cpumask_bits(cpus), small_cpumask_bits, cpu); } - -static inline const struct cpumask * -sched_numa_hop_mask(unsigned int node, unsigned int hops) -{ - return ERR_PTR(-EOPNOTSUPP); -} #endif /* CONFIG_NUMA */ -/** - * for_each_numa_hop_mask - iterate over cpumasks of increasing NUMA distance - * from a given node. - * @mask: the iteration variable. - * @node: the NUMA node to start the search from. - * - * Requires rcu_lock to be held. - * - * Yields cpu_online_mask for @node == NUMA_NO_NODE. - */ -#define for_each_numa_hop_mask(mask, node) \ - for (unsigned int __hops = 0; \ - mask = (node != NUMA_NO_NODE || __hops) ? \ - sched_numa_hop_mask(node, __hops) : \ - cpu_online_mask, \ - !IS_ERR_OR_NULL(mask); \ - __hops++) - /** * for_each_numa_cpu - iterate over cpus in increasing order taking into account * NUMA distances from a given node. diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index 56daa279c411..9d08ffdbd2d8 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -2171,38 +2171,6 @@ int sched_numa_find_next_cpu(const struct cpumask *cpus, int cpu, int node, unsi } EXPORT_SYMBOL_GPL(sched_numa_find_next_cpu); -/** - * sched_numa_hop_mask() - Get the cpumask of CPUs at most @hops hops away from - * @node - * @node: The node to count hops from. - * @hops: Include CPUs up to that many hops away. 0 means local node. - * - * Return: On success, a pointer to a cpumask of CPUs at most @hops away from - * @node, an error value otherwise. - * - * Requires rcu_lock to be held. Returned cpumask is only valid within that - * read-side section, copy it if required beyond that. - * - * Note that not all hops are equal in distance; see sched_init_numa() for how - * distances and masks are handled. - * Also note that this is a reflection of sched_domains_numa_masks, which may change - * during the lifetime of the system (offline nodes are taken out of the masks). - */ -const struct cpumask *sched_numa_hop_mask(unsigned int node, unsigned int hops) -{ - struct cpumask ***masks; - - if (node >= nr_node_ids || hops >= sched_domains_numa_levels) - return ERR_PTR(-EINVAL); - - masks = rcu_dereference(sched_domains_numa_masks); - if (!masks) - return ERR_PTR(-EBUSY); - - return masks[hops][node]; -} -EXPORT_SYMBOL_GPL(sched_numa_hop_mask); - #endif /* CONFIG_NUMA */ static int __sdt_alloc(const struct cpumask *cpu_map) diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c index 1b5f805f6879..6becb044a66f 100644 --- a/lib/test_bitmap.c +++ b/lib/test_bitmap.c @@ -756,19 +756,6 @@ static void __init test_for_each_numa(void) { unsigned int cpu, node; - for (node = 0; node < sched_domains_numa_levels; node++) { - const struct cpumask *m, *p = cpu_none_mask; - unsigned int c = 0; - - rcu_read_lock(); - for_each_numa_hop_mask(m, node) { - for_each_cpu_andnot(cpu, m, p) - expect_eq_uint(cpumask_local_spread(c++, node), cpu); - p = m; - } - rcu_read_unlock(); - } - for (node = 0; node < sched_domains_numa_levels; node++) { unsigned int hop, c = 0;