diff options
Diffstat (limited to 'kernel/arch/mips/mm/c-r4k.c')
| -rw-r--r-- | kernel/arch/mips/mm/c-r4k.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/kernel/arch/mips/mm/c-r4k.c b/kernel/arch/mips/mm/c-r4k.c index 2e03ab173..dca0efc07 100644 --- a/kernel/arch/mips/mm/c-r4k.c +++ b/kernel/arch/mips/mm/c-r4k.c @@ -37,6 +37,7 @@ #include <asm/cacheflush.h> /* for run_uncached() */ #include <asm/traps.h> #include <asm/dma-coherence.h> +#include <asm/mips-cm.h> /* * Special Variant of smp_call_function for use by cache functions: @@ -51,9 +52,16 @@ static inline void r4k_on_each_cpu(void (*func) (void *info), void *info) { preempt_disable(); -#ifndef CONFIG_MIPS_MT_SMP - smp_call_function(func, info, 1); -#endif + /* + * The Coherent Manager propagates address-based cache ops to other + * cores but not index-based ops. However, r4k_on_each_cpu is used + * in both cases so there is no easy way to tell what kind of op is + * executed to the other cores. The best we can probably do is + * to restrict that call when a CM is not present because both + * CM-based SMP protocols (CMP & CPS) restrict index-based cache ops. + */ + if (!mips_cm_present()) + smp_call_function_many(&cpu_foreign_map, func, info, 1); func(info); preempt_enable(); } |