diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2024-07-04 19:03:41 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2024-07-09 13:26:37 +0200 |
| commit | 2b84def990d388bed4afe4f21ae383a01991046c (patch) | |
| tree | 91218c98aa370156832d528b67700c4636f1ee6b /lib/crypto/mpi/mpi-pow.c | |
| parent | 16b9569df9d2ab07eeee075cb7895e9d3e08e8f0 (diff) | |
perf: Split __perf_pending_irq() out of perf_pending_irq()
perf_pending_irq() invokes perf_event_wakeup() and __perf_pending_irq().
The former is in charge of waking any tasks which waits to be woken up
while the latter disables perf-events.
The irq_work perf_pending_irq(), while this an irq_work, the callback
is invoked in thread context on PREEMPT_RT. This is needed because all
the waking functions (wake_up_all(), kill_fasync()) acquire sleep locks
which must not be used with disabled interrupts.
Disabling events, as done by __perf_pending_irq(), expects a hardirq
context and disabled interrupts. This requirement is not fulfilled on
PREEMPT_RT.
Split functionality based on perf_event::pending_disable into irq_work
named `pending_disable_irq' and invoke it in hardirq context on
PREEMPT_RT. Rename the split out callback to perf_pending_disable().
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Marco Elver <elver@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: https://lore.kernel.org/r/20240704170424.1466941-8-bigeasy@linutronix.de
Diffstat (limited to 'lib/crypto/mpi/mpi-pow.c')
0 files changed, 0 insertions, 0 deletions