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Commit 6594b982 authored by Steven Miao's avatar Steven Miao Committed by Bob Liu
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Blackfin: smp: add smp_mb() to keep coherency 



After use generic smp helpers, smp_mb() should be added to keep coherency.

Signed-off-by: default avatarSteven Miao <realmz6@gmail.com>
Signed-off-by: default avatarBob Liu <lliubbo@gmail.com>
parent 4087af4c

arch/blackfin/mach-common/smp.c

+2 −2
Original line number Diff line number Diff line
@@ -146,7 +146,7 @@ static irqreturn_t ipi_handler_int1(int irq, void *dev_instance) 
	platform_clear_ipi(cpu, IRQ_SUPPLE_1);



	bfin_ipi_data = &__get_cpu_var(bfin_ipi);



	smp_mb();

	while ((pending = xchg(&bfin_ipi_data->bits, 0)) != 0) {

		msg = 0;

		do {
@@ -195,7 +195,7 @@ void send_ipi(const struct cpumask *cpumask, enum ipi_message_type msg) 
	unsigned long flags;



	local_irq_save(flags);



	smp_mb();

	for_each_cpu(cpu, cpumask) {

		bfin_ipi_data = &per_cpu(bfin_ipi, cpu);

		smp_mb();