1 files changed, 5 insertions, 4 deletions

diff --git a/arch/mips/cavium-octeon/executive/cvmx-l2c.c b/arch/mips/cavium-octeon/executive/cvmx-l2c.c
index 9f883bf76953..33b72144db31 100644
--- a/arch/mips/cavium-octeon/executive/cvmx-l2c.c
+++ b/arch/mips/cavium-octeon/executive/cvmx-l2c.c
@@ -30,6 +30,7 @@
  * measurement, and debugging facilities.
  */
 
+#include <linux/compiler.h>
 #include <linux/irqflags.h>
 #include <asm/octeon/cvmx.h>
 #include <asm/octeon/cvmx-l2c.h>
@@ -285,22 +286,22 @@ uint64_t cvmx_l2c_read_perf(uint32_t counter)
  */
 static void fault_in(uint64_t addr, int len)
 {
-        volatile char *ptr;
-        volatile char dummy;
+        char *ptr;
+
         /*
          * Adjust addr and length so we get all cache lines even for
          * small ranges spanning two cache lines.
          */
         len += addr & CVMX_CACHE_LINE_MASK;
         addr &= ~CVMX_CACHE_LINE_MASK;
-        ptr = (volatile char *)cvmx_phys_to_ptr(addr);
+        ptr = cvmx_phys_to_ptr(addr);
         /*
          * Invalidate L1 cache to make sure all loads result in data
          * being in L2.
          */
         CVMX_DCACHE_INVALIDATE;
         while (len > 0) {
-                dummy += *ptr;
+                ACCESS_ONCE(*ptr);
                 len -= CVMX_CACHE_LINE_SIZE;
                 ptr += CVMX_CACHE_LINE_SIZE;
         }