[MIPS] Fix RM9000 wait instruction detection.

Only revisions < 4.0 don't have a functional wait instruction.

From Thomas Koeller (Thomas.Koeller@baslerweb.com).

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 9fbf8430c849..8485af340ee1 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -135,7 +135,6 @@ static inline void check_wait(void)
         case CPU_R5000:
         case CPU_NEVADA:
         case CPU_RM7000:
-        case CPU_RM9000:
         case CPU_4KC:
         case CPU_4KEC:
         case CPU_4KSC:
@@ -164,6 +163,14 @@ static inline void check_wait(void)
                 } else
                         printk(" unavailable.\n");
                 break;
+        case CPU_RM9000:
+                if ((c->processor_id & 0x00ff) >= 0x40) {
+                        cpu_wait = r4k_wait;
+                        printk(" available.\n");
+                } else {
+                        printk(" unavailable.\n");
+                }
+                break;
         default:
                 printk(" unavailable.\n");
                 break;