smp: Warn on function calls from softirq context

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It's clearly documented that smp function calls cannot be invoked from
softirq handling context. Unfortunately nothing enforces that or emits a
warning.

A single function call can be invoked from softirq context only via
smp_call_function_single_async().

The only legit context is task context, so add a warning to that effect.

Reported-by: luferry <luferry@163.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190718160601.GP3402@hirez.programming.kicks-ass.net

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Peter Zijlstra 2019-07-18 11:20:09 +02:00 • committed by Thomas Gleixner

parent 22051d9c4a

commit 19dbdcb803

1 changed files with 16 additions and 0 deletions

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kernel/smp.c

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