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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2024-07-04 19:03:40 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2024-07-09 13:26:36 +0200 |
| commit | 16b9569df9d2ab07eeee075cb7895e9d3e08e8f0 (patch) | |
| tree | f90b1ab059207cb3715b832d260c2f4d3064eaf3 /lib/crypto/mpi/mpi-pow.c | |
| parent | 0d40a6d83e3e6751f1107ba33587262d937c969f (diff) | |
perf: Don't disable preemption in perf_pending_task().
perf_pending_task() is invoked in task context and disables preemption
because perf_swevent_get_recursion_context() used to access per-CPU
variables. The other reason is to create a RCU read section while
accessing the perf_event.
The recursion counter is no longer a per-CPU accounter so disabling
preemption is no longer required. The RCU section is needed and must be
created explicit.
Replace the preemption-disable section with a explicit RCU-read section.
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>
Link: https://lore.kernel.org/r/20240704170424.1466941-7-bigeasy@linutronix.de
Diffstat (limited to 'lib/crypto/mpi/mpi-pow.c')
0 files changed, 0 insertions, 0 deletions