compiler: introduce __used and __maybe_unused

[powerpc.git] / mm / allocpercpu.c

diff --git a/mm/allocpercpu.c b/mm/allocpercpu.c
index eaa9abe..b2486cf 100644 (file)
--- a/mm/allocpercpu.c
+++ b/mm/allocpercpu.c
@@ -17,10 +17,9 @@
 void percpu_depopulate(void *__pdata, int cpu)
 {
        struct percpu_data *pdata = __percpu_disguise(__pdata);
-       if (pdata->ptrs[cpu]) {
-               kfree(pdata->ptrs[cpu]);
-               pdata->ptrs[cpu] = NULL;
-       }
+
+       kfree(pdata->ptrs[cpu]);
+       pdata->ptrs[cpu] = NULL;
 }
 EXPORT_SYMBOL_GPL(percpu_depopulate);
 
@@ -123,6 +122,8 @@ EXPORT_SYMBOL_GPL(__percpu_alloc_mask);
  */
 void percpu_free(void *__pdata)
 {
+       if (unlikely(!__pdata))
+               return;
        __percpu_depopulate_mask(__pdata, &cpu_possible_map);
        kfree(__percpu_disguise(__pdata));
 }