When Core-0 handle SMP_ASK_C0COUNT IPI, we should make other cores to see the result as soon as possible (especially when Store-Fill-Buffer is enabled). Otherwise, C0_Count syncronization makes no sense. Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx> --- arch/mips/loongson64/loongson-3/smp.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/mips/loongson64/loongson-3/smp.c b/arch/mips/loongson64/loongson-3/smp.c index 1a4738a..38c775b 100644 --- a/arch/mips/loongson64/loongson-3/smp.c +++ b/arch/mips/loongson64/loongson-3/smp.c @@ -277,6 +277,7 @@ void loongson3_ipi_interrupt(struct pt_regs *regs) c0count = read_c0_count(); for (i = 1; i < num_possible_cpus(); i++) per_cpu(core0_c0count, i) = c0count; + __wbflush(); /* Let others see the result ASAP */ } } -- 2.4.6
