From 7ab2bd31df871408792eac871c4187e29d039315 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Sun, 2 May 2021 19:56:05 -0700 Subject: [PATCH] rcutorture: Move mem_dump_obj() tests into separate function To make the purpose of the code more apparent, this commit moves the tests of mem_dump_obj() to a new rcu_torture_mem_dump_obj() function and calls it from rcu_torture_cleanup(). Signed-off-by: Paul E. McKenney --- kernel/rcu/rcutorture.c | 81 +++++++++++++++++++++-------------------- 1 file changed, 42 insertions(+), 39 deletions(-) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 8b347b9659aa..ec69273898af 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1868,48 +1868,49 @@ rcu_torture_stats(void *arg) torture_shutdown_absorb("rcu_torture_stats"); } while (!torture_must_stop()); torture_kthread_stopping("rcu_torture_stats"); - - { - struct rcu_head *rhp; - struct kmem_cache *kcp; - static int z; - - kcp = kmem_cache_create("rcuscale", 136, 8, SLAB_STORE_USER, NULL); - rhp = kmem_cache_alloc(kcp, GFP_KERNEL); - pr_alert("mem_dump_obj() slab test: rcu_torture_stats = %px, &rhp = %px, rhp = %px, &z = %px\n", stats_task, &rhp, rhp, &z); - pr_alert("mem_dump_obj(ZERO_SIZE_PTR):"); - mem_dump_obj(ZERO_SIZE_PTR); - pr_alert("mem_dump_obj(NULL):"); - mem_dump_obj(NULL); - pr_alert("mem_dump_obj(%px):", &rhp); - mem_dump_obj(&rhp); - pr_alert("mem_dump_obj(%px):", rhp); - mem_dump_obj(rhp); - pr_alert("mem_dump_obj(%px):", &rhp->func); - mem_dump_obj(&rhp->func); - pr_alert("mem_dump_obj(%px):", &z); - mem_dump_obj(&z); - kmem_cache_free(kcp, rhp); - kmem_cache_destroy(kcp); - rhp = kmalloc(sizeof(*rhp), GFP_KERNEL); - pr_alert("mem_dump_obj() kmalloc test: rcu_torture_stats = %px, &rhp = %px, rhp = %px\n", stats_task, &rhp, rhp); - pr_alert("mem_dump_obj(kmalloc %px):", rhp); - mem_dump_obj(rhp); - pr_alert("mem_dump_obj(kmalloc %px):", &rhp->func); - mem_dump_obj(&rhp->func); - kfree(rhp); - rhp = vmalloc(4096); - pr_alert("mem_dump_obj() vmalloc test: rcu_torture_stats = %px, &rhp = %px, rhp = %px\n", stats_task, &rhp, rhp); - pr_alert("mem_dump_obj(vmalloc %px):", rhp); - mem_dump_obj(rhp); - pr_alert("mem_dump_obj(vmalloc %px):", &rhp->func); - mem_dump_obj(&rhp->func); - vfree(rhp); - } - return 0; } +/* Test mem_dump_obj() and friends. */ +static void rcu_torture_mem_dump_obj(void) +{ + struct rcu_head *rhp; + struct kmem_cache *kcp; + static int z; + + kcp = kmem_cache_create("rcuscale", 136, 8, SLAB_STORE_USER, NULL); + rhp = kmem_cache_alloc(kcp, GFP_KERNEL); + pr_alert("mem_dump_obj() slab test: rcu_torture_stats = %px, &rhp = %px, rhp = %px, &z = %px\n", stats_task, &rhp, rhp, &z); + pr_alert("mem_dump_obj(ZERO_SIZE_PTR):"); + mem_dump_obj(ZERO_SIZE_PTR); + pr_alert("mem_dump_obj(NULL):"); + mem_dump_obj(NULL); + pr_alert("mem_dump_obj(%px):", &rhp); + mem_dump_obj(&rhp); + pr_alert("mem_dump_obj(%px):", rhp); + mem_dump_obj(rhp); + pr_alert("mem_dump_obj(%px):", &rhp->func); + mem_dump_obj(&rhp->func); + pr_alert("mem_dump_obj(%px):", &z); + mem_dump_obj(&z); + kmem_cache_free(kcp, rhp); + kmem_cache_destroy(kcp); + rhp = kmalloc(sizeof(*rhp), GFP_KERNEL); + pr_alert("mem_dump_obj() kmalloc test: rcu_torture_stats = %px, &rhp = %px, rhp = %px\n", stats_task, &rhp, rhp); + pr_alert("mem_dump_obj(kmalloc %px):", rhp); + mem_dump_obj(rhp); + pr_alert("mem_dump_obj(kmalloc %px):", &rhp->func); + mem_dump_obj(&rhp->func); + kfree(rhp); + rhp = vmalloc(4096); + pr_alert("mem_dump_obj() vmalloc test: rcu_torture_stats = %px, &rhp = %px, rhp = %px\n", stats_task, &rhp, rhp); + pr_alert("mem_dump_obj(vmalloc %px):", rhp); + mem_dump_obj(rhp); + pr_alert("mem_dump_obj(vmalloc %px):", &rhp->func); + mem_dump_obj(&rhp->func); + vfree(rhp); +} + static void rcu_torture_print_module_parms(struct rcu_torture_ops *cur_ops, const char *tag) { @@ -2825,6 +2826,8 @@ rcu_torture_cleanup(void) if (cur_ops->cleanup != NULL) cur_ops->cleanup(); + rcu_torture_mem_dump_obj(); + rcu_torture_stats_print(); /* -After- the stats thread is stopped! */ if (err_segs_recorded) {