[incubator-nuttx] branch master updated: mm_size2ndx: using flsl to calculate the ndx

[xi...@apache.org]

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xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git


The following commit(s) were added to refs/heads/master by this push:
     new f7dec2c250 mm_size2ndx: using flsl to calculate the ndx
f7dec2c250 is described below

commit f7dec2c250a2c35da320ec9083f03268add28282
Author: wangbowen6 <wa...@xiaomi.com>
AuthorDate: Wed Nov 23 00:13:38 2022 +0800

    mm_size2ndx: using flsl to calculate the ndx
    
    Signed-off-by: wangbowen6 <wa...@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;
 }