Max Filippov 815af8fff1 xtensa: SMP: rework IPI processing ...

Don't skip current CPU in send_ipi_message: callers of this function
take care of it and it's harmless anyway.
Don't clear IPI bits one by one, clear all that were read at once.
Check IPI register in a loop in case new IPI was posted while previous
was being handled.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

2019-02-07 12:16:17 -08:00

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