Ralf Baechle wrote:
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index f599e79..7ee0cb0 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -75,6 +75,26 @@ static void r4k_wait_irqoff(void)
local_irq_enable();
}
+/*
+ * The RM7000 variant has to handle erratum 38. The workaround is to not
+ * have any pending stores when the WAIT instruction is executed.
+ */
+static void rm7k_wait_irqoff(void)
+{
+ local_irq_disable();
+ if (!need_resched())
+ __asm__(
+ " .set push \n"
+ " .set mips3 \n"
+ " .set noat \n"
+ " mfc0 $1, $12 \n"
+ " sync \n"
+ " mtc0 $1, $12 \n"
+ " wait \n"
+ " .set pop \n");
+ local_irq_enable();
+}
+
Technically, Shouldn't that __asm__ be volatile?
David Daney
