/* Function to determine if a thread group is single threaded or not * * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * - Derived from security/selinux/hooks.c * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public Licence * as published by the Free Software Foundation; either version * 2 of the Licence, or (at your option) any later version. */ #include /* * Returns true if the task does not share ->mm with another thread/process. */ bool current_is_single_threaded(void) { struct task_struct *task = current; struct mm_struct *mm = task->mm; struct task_struct *p, *t; bool ret; if (atomic_read(&task->signal->live) != 1) return false; if (atomic_read(&mm->mm_users) == 1) return true; ret = false; rcu_read_lock(); for_each_process(p) { if (unlikely(p->flags & PF_KTHREAD)) continue; if (unlikely(p == task->group_leader)) continue; for_each_thread(p, t) { if (unlikely(t->mm == mm)) goto found; if (likely(t->mm)) break; /* * t->mm == NULL. Make sure next_thread/next_task * will see other CLONE_VM tasks which might be * forked before exiting. */ smp_rmb(); } } ret = true; found: rcu_read_unlock(); return ret; } cket-rx-pump-back'>packet-rx-pump-back net-next plumbingsTobias Klauser
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authorColin Ian King <colin.king@canonical.com>2017-01-11 15:36:20 +0000
committerMark Brown <broonie@kernel.org>2017-01-18 16:32:44 +0000
commitb98acbff9a05b371c5f0ca6e44a3af8ce9274379 (patch)
treed6835885f859a456e62ce93621041138d6a54f9b /tools/testing/ktest/examples
parentd00b74613fb18dfd0a5aa99270ee2e72d5c808d7 (diff)
regulator: twl6030: fix range comparison, allowing vsel = 59
The range min_uV > 1350000 && min_uV <= 150000 is never reachable because of a typo in the previous range check and hence vsel = 59 is never reached. Fix the previous range check to enable the vsel = 59 setting. Fixes CoverityScan CID#728454 ("Logially dead code") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'tools/testing/ktest/examples')