From f7dec2c250a2c35da320ec9083f03268add28282 Mon Sep 17 00:00:00 2001
From: wangbowen6 <wangbowen6@xiaomi.com>
Date: Wed, 23 Nov 2022 00:13:38 +0800
Subject: [PATCH] mm_size2ndx: using flsl to calculate the ndx

Signed-off-by: wangbowen6 <wangbowen6@xiaomi.com>
---
 mm/mm_heap/mm_size2ndx.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/mm/mm_heap/mm_size2ndx.c b/mm/mm_heap/mm_size2ndx.c
index 5d0f9fa2a7..73dad34cc5 100644
--- a/mm/mm_heap/mm_size2ndx.c
+++ b/mm/mm_heap/mm_size2ndx.c
@@ -24,6 +24,8 @@
 
 #include <nuttx/config.h>
 
+#include <string.h>
+
 #include <nuttx/mm/mm.h>
 
 #include "mm_heap/mm.h"
@@ -42,19 +44,11 @@
 
 int mm_size2ndx(size_t size)
 {
-  int ndx = 0;
-
   if (size >= MM_MAX_CHUNK)
     {
       return MM_NNODES - 1;
     }
 
   size >>= MM_MIN_SHIFT;
-  while (size > 1)
-    {
-      ndx++;
-      size >>= 1;
-    }
-
-  return ndx;
+  return flsl(size) - 1;
 }