Commit 0654de1c authored by Anton Blanchard's avatar Anton Blanchard Committed by Benjamin Herrenschmidt
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powerpc: Little endian SMP IPI demux 



Add little endian support for demuxing SMP IPIs

Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 4288e343

arch/powerpc/kernel/smp.c

+10 −9
Original line number Diff line number Diff line
@@ -232,6 +232,12 @@ void smp_muxed_ipi_message_pass(int cpu, int msg) 
	smp_ops->cause_ipi(cpu, info->data);

}



#ifdef __BIG_ENDIAN__

#define IPI_MESSAGE(A) (1 << (24 - 8 * (A)))

#else

#define IPI_MESSAGE(A) (1 << (8 * (A)))

#endif



irqreturn_t smp_ipi_demux(void)

{

	struct cpu_messages *info = &__get_cpu_var(ipi_message);
@@ -241,19 +247,14 @@ irqreturn_t smp_ipi_demux(void) 


	do {

		all = xchg(&info->messages, 0);



#ifdef __BIG_ENDIAN

		if (all & (1 << (24 - 8 * PPC_MSG_CALL_FUNCTION)))

		if (all & IPI_MESSAGE(PPC_MSG_CALL_FUNCTION))

			generic_smp_call_function_interrupt();

		if (all & (1 << (24 - 8 * PPC_MSG_RESCHEDULE)))

		if (all & IPI_MESSAGE(PPC_MSG_RESCHEDULE))

			scheduler_ipi();

		if (all & (1 << (24 - 8 * PPC_MSG_CALL_FUNC_SINGLE)))

		if (all & IPI_MESSAGE(PPC_MSG_CALL_FUNC_SINGLE))

			generic_smp_call_function_single_interrupt();

		if (all & (1 << (24 - 8 * PPC_MSG_DEBUGGER_BREAK)))

		if (all & IPI_MESSAGE(PPC_MSG_DEBUGGER_BREAK))

			debug_ipi_action(0, NULL);

#else

#error Unsupported ENDIAN

#endif

	} while (info->messages);



	return IRQ_HANDLED;