Commit 699ff13f authored by Michael Ryan's avatar Michael Ryan Committed by Linus Torvalds
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[PATCH] s390: cpu up retries 



Retry starting of new cpu if sigp restart returns condition code 2 (busy).

Signed-off-by: default avatarMichael Ryan <ryan@funsoft.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 4896cef8

arch/s390/kernel/smp.c

+3 −1
Original line number Diff line number Diff line
@@ -665,7 +665,9 @@ __cpu_up(unsigned int cpu) 
        cpu_lowcore->current_task = (unsigned long) idle;

        cpu_lowcore->cpu_data.cpu_nr = cpu;

	eieio();

	signal_processor(cpu,sigp_restart);



	while (signal_processor(cpu,sigp_restart) == sigp_busy)

		udelay(10);



	while (!cpu_online(cpu))

		cpu_relax();