#include #include #include "evsel.h" #include "tests.h" #include "debug.h" static int perf_evsel__test_field(struct perf_evsel *evsel, const char *name, int size, bool should_be_signed) { struct format_field *field = perf_evsel__field(evsel, name); int is_signed; int ret = 0; if (field == NULL) { pr_debug("%s: \"%s\" field not found!\n", evsel->name, name); return -1; } is_signed = !!(field->flags | FIELD_IS_SIGNED); if (should_be_signed && !is_signed) { pr_debug("%s: \"%s\" signedness(%d) is wrong, should be %d\n", evsel->name, name, is_signed, should_be_signed); ret = -1; } if (field->size != size) { pr_debug("%s: \"%s\" size (%d) should be %d!\n", evsel->name, name, field->size, size); ret = -1; } return ret; } int test__perf_evsel__tp_sched_test(int subtest __maybe_unused) { struct perf_evsel *evsel = perf_evsel__newtp("sched", "sched_switch"); int ret = 0; if (IS_ERR(evsel)) { pr_debug("perf_evsel__newtp failed with %ld\n", PTR_ERR(evsel)); return -1; } if (perf_evsel__test_field(evsel, "prev_comm", 16, true)) ret = -1; if (perf_evsel__test_field(evsel, "prev_pid", 4, true)) ret = -1; if (perf_evsel__test_field(evsel, "prev_prio", 4, true)) ret = -1; if (perf_evsel__test_field(evsel, "prev_state", sizeof(long), true)) ret = -1; if (perf_evsel__test_field(evsel, "next_comm", 16, true)) ret = -1; if (perf_evsel__test_field(evsel, "next_pid", 4, true)) ret = -1; if (perf_evsel__test_field(evsel, "next_prio", 4, true)) ret = -1; perf_evsel__delete(evsel); evsel = perf_evsel__newtp("sched", "sched_wakeup"); if (IS_ERR(evsel)) { pr_debug("perf_evsel__newtp failed with %ld\n", PTR_ERR(evsel)); return -1; } if (perf_evsel__test_field(evsel, "comm", 16, true)) ret = -1; if (perf_evsel__test_field(evsel, "pid", 4, true)) ret = -1; if (perf_evsel__test_field(evsel, "prio", 4, true)) ret = -1; if (perf_evsel__test_field(evsel, "target_cpu", 4, true)) ret = -1; return ret; } d86852f00d2c8afc943d1f480d6ed2703'>commitdiff
path: root/sound/usb/6fire/pcm.h
d' value='add7c65ca426b7a37184dd3d2172394e23d585d6'/>
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authorAndrei Vagin <avagin@openvz.org>2017-01-04 19:28:14 -0800
committerEric W. Biederman <ebiederm@xmission.com>2017-01-10 13:34:56 +1300
commitadd7c65ca426b7a37184dd3d2172394e23d585d6 (patch)
tree28b08b519540041b06ed0ab0b1c005076b932e8e /net/ieee802154/6lowpan/reassembly.c
parent75422726b0f717d67db3283c2eb5bc14fa2619c5 (diff)
pid: fix lockdep deadlock warning due to ucount_lock
========================================================= [ INFO: possible irq lock inversion dependency detected ] 4.10.0-rc2-00024-g4aecec9-dirty #118 Tainted: G W --------------------------------------------------------- swapper/1/0 just changed the state of lock: (&(&sighand->siglock)->rlock){-.....}, at: [<ffffffffbd0a1bc6>] __lock_task_sighand+0xb6/0x2c0 but this lock took another, HARDIRQ-unsafe lock in the past: (ucounts_lock){+.+...} and interrupts could create inverse lock ordering between them. other info that might help us debug this: Chain exists of: &(&sighand->siglock)->rlock --> &(&tty->ctrl_lock)->rlock --> ucounts_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(ucounts_lock); local_irq_disable(); lock(&(&sighand->siglock)->rlock); lock(&(&tty->ctrl_lock)->rlock); <Interrupt> lock(&(&sighand->siglock)->rlock); *** DEADLOCK *** This patch removes a dependency between rlock and ucount_lock. Fixes: f333c700c610 ("pidns: Add a limit on the number of pid namespaces") Cc: stable@vger.kernel.org Signed-off-by: Andrei Vagin <avagin@openvz.org> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'net/ieee802154/6lowpan/reassembly.c')