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| author | Steven Miao <realmz6@gmail.com> | 2012-09-04 12:57:14 +0400 |
|---|---|---|
| committer | Bob Liu <lliubbo@gmail.com> | 2012-10-08 10:36:30 +0400 |
| commit | 6594b982f6d5f957c8d72de7658bf8e240c7dfca (patch) | |
| tree | 9d7c0acc8206760ca6ca1ab7a8b8861d8785efc4 | |
| parent | 4087af4c7f978fe574378e5d1e69db88281e60ce (diff) | |
| download | linux-6594b982f6d5f957c8d72de7658bf8e240c7dfca.tar.xz | |
Blackfin: smp: add smp_mb() to keep coherency
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>
| -rw-r--r-- | arch/blackfin/mach-common/smp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c index a40151306b77..bb61ae4986e4 100644 --- a/arch/blackfin/mach-common/smp.c +++ b/arch/blackfin/mach-common/smp.c @@ -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(); |