Kernel bump from 4.1.3-rt to 4.1.7-rt.

[kvmfornfv.git] / kernel / arch / mips / mm / c-r4k.c

diff --git a/kernel/arch/mips/mm/c-r4k.c b/kernel/arch/mips/mm/c-r4k.c
index 2e03ab1..dca0efc 100644 (file)
--- 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();
 }