bpf/tracing: Remove redundant preempt_disable() in __bpf_trace_run()

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__bpf_trace_run() disables preemption around the BPF_PROG_RUN() invocation.

This is redundant because __bpf_trace_run() is invoked from a trace point
via __DO_TRACE() which already disables preemption _before_ invoking any of
the functions which are attached to a trace point.

Remove it and add a cant_sleep() check.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200224145642.847220186@linutronix.de

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Thomas Gleixner 2020-02-24 15:01:35 +01:00 • committed by Alexei Starovoitov

parent dbca151cad

commit f03efe49bd

1 changed files with 1 additions and 2 deletions

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kernel/trace/bpf_trace.c

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