1 files changed, 4 insertions, 3 deletions

diff --git a/mm/slob.c b/mm/slob.c
index ec33fcdc852e..de5d5563a46c 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -360,7 +360,7 @@ static void slob_free(void *block, int size)
         slobidx_t units;
         unsigned long flags;
 
-        if (ZERO_OR_NULL_PTR(block))
+        if (unlikely(ZERO_OR_NULL_PTR(block)))
                 return;
         BUG_ON(!size);
 
@@ -466,7 +466,7 @@ void kfree(const void *block)
 {
         struct slob_page *sp;
 
-        if (ZERO_OR_NULL_PTR(block))
+        if (unlikely(ZERO_OR_NULL_PTR(block)))
                 return;
 
         sp = (struct slob_page *)virt_to_page(block);
@@ -484,7 +484,8 @@ size_t ksize(const void *block)
 {
         struct slob_page *sp;
 
-        if (ZERO_OR_NULL_PTR(block))
+        BUG_ON(!block);
+        if (unlikely(block == ZERO_SIZE_PTR))
                 return 0;
 
         sp = (struct slob_page *)virt_to_page(block);