https://github.com/torvalds/linux
Revision 80d20d35af1edd632a5e7a3b9c0ab7ceff92769e authored by Anna-Maria Gleixner on 31 July 2018, 16:13:58 UTC, committed by Thomas Gleixner on 31 July 2018, 20:08:44 UTC
local_timer_softirq_pending() checks whether the timer softirq is
pending with: local_softirq_pending() & TIMER_SOFTIRQ.

This is wrong because TIMER_SOFTIRQ is the softirq number and not a
bitmask. So the test checks for the wrong bit.

Use BIT(TIMER_SOFTIRQ) instead.

Fixes: 5d62c183f9e9 ("nohz: Prevent a timer interrupt storm in tick_nohz_stop_sched_tick()")
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Cc: bigeasy@linutronix.de
Cc: peterz@infradead.org
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180731161358.29472-1-anna-maria@linutronix.de

1 parent acb1872
History
Tip revision: 80d20d35af1edd632a5e7a3b9c0ab7ceff92769e authored by Anna-Maria Gleixner on 31 July 2018, 16:13:58 UTC
nohz: Fix local_timer_softirq_pending()
Tip revision: 80d20d3
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