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Blackfin: smp: add smp_mb() to keep coherency

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

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
This commit is contained in:
Steven Miao 2012-09-04 16:57:14 +08:00 committed by Bob Liu
parent 4087af4c7f
commit 6594b982f6
1 changed files with 2 additions and 2 deletions
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4
arch/blackfin/mach-common/smp.c
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@ -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();