microblaze: Adding likely macros

On the base on GCOV analytics is helpful to add likely/unlikely
macros.

Signed-off-by: Michal Simek <monstr@monstr.eu>

1 files changed, 8 insertions, 7 deletions

diff --git a/arch/microblaze/lib/memset.c b/arch/microblaze/lib/memset.c
index 4df851d41a29..ecfb663e1fc1 100644
--- a/arch/microblaze/lib/memset.c
+++ b/arch/microblaze/lib/memset.c
@@ -33,22 +33,23 @@
 #ifdef __HAVE_ARCH_MEMSET
 void *memset(void *v_src, int c, __kernel_size_t n)
 {
-
         char *src = v_src;
 #ifdef CONFIG_OPT_LIB_FUNCTION
         uint32_t *i_src;
-        uint32_t w32;
+        uint32_t w32 = 0;
 #endif
         /* Truncate c to 8 bits */
         c = (c & 0xFF);
 
 #ifdef CONFIG_OPT_LIB_FUNCTION
-        /* Make a repeating word out of it */
-        w32 = c;
-        w32 |= w32 << 8;
-        w32 |= w32 << 16;
+        if (unlikely(c)) {
+                /* Make a repeating word out of it */
+                w32 = c;
+                w32 |= w32 << 8;
+                w32 |= w32 << 16;
+        }
 
-        if (n >= 4) {
+        if (likely(n >= 4)) {
                 /* Align the destination to a word boundary */
                 /* This is done in an endian independant manner */
                 switch ((unsigned) src & 3) {