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| author | Valentin Schneider <valentin.schneider@arm.com> | 2018-12-19 19:23:16 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-01-21 11:18:54 +0100 |
| commit | b5a4e2bb0f4c86bfeb38df3e1d5b2f1272f0e673 (patch) | |
| tree | 2a674ac8cbb2426b545b94cde144161a009ca0d4 /kernel/sched | |
| parent | cpu/hotplug: Mute hotplug lockdep during init (diff) | |
| download | linux-b5a4e2bb0f4c86bfeb38df3e1d5b2f1272f0e673.tar.xz linux-b5a4e2bb0f4c86bfeb38df3e1d5b2f1272f0e673.zip | |
Revert "sched/core: Take the hotplug lock in sched_init_smp()"
This reverts commit 40fa3780bac2b654edf23f6b13f4e2dd550aea10.
Now that we have a system-wide muting of hotplug lockdep during init,
this is no longer needed.
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: cai@gmx.us
Cc: daniel.lezcano@linaro.org
Cc: dietmar.eggemann@arm.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: longman@redhat.com
Cc: marc.zyngier@arm.com
Cc: mark.rutland@arm.com
Link: https://lkml.kernel.org/r/1545243796-23224-3-git-send-email-valentin.schneider@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index b05eef7d7a1f..3c8b4dba3d2d 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5867,14 +5867,11 @@ void __init sched_init_smp(void) /* * There's no userspace yet to cause hotplug operations; hence all the * CPU masks are stable and all blatant races in the below code cannot - * happen. The hotplug lock is nevertheless taken to satisfy lockdep, - * but there won't be any contention on it. + * happen. */ - cpus_read_lock(); mutex_lock(&sched_domains_mutex); sched_init_domains(cpu_active_mask); mutex_unlock(&sched_domains_mutex); - cpus_read_unlock(); /* Move init over to a non-isolated CPU */ if (set_cpus_allowed_ptr(current, housekeeping_cpumask(HK_FLAG_DOMAIN)) < 0) |