[PATCH] kernel/groups.c: use bsearch library function

[Thomas Meyer]

commit b7b2562f7252 ("kernel/groups.c: use sort library function")
introduced the sort library function.
also use the bsearch library function instead of open-coding the binary
search.

Signed-off-by: Thomas Meyer <tho...@m3y3r.de>
---
 kernel/groups.c | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/kernel/groups.c b/kernel/groups.c
index daae2f2dc6d4f..69561a9cb4d39 100644
--- a/kernel/groups.c
+++ b/kernel/groups.c
@@ -2,6 +2,7 @@
 /*
  * Supplementary group IDs
  */
+#include <linux/bsearch.h>
 #include <linux/cred.h>
 #include <linux/export.h>
 #include <linux/slab.h>
@@ -96,22 +97,12 @@ EXPORT_SYMBOL(groups_sort);
 /* a simple bsearch */
 int groups_search(const struct group_info *group_info, kgid_t grp)
 {
-       unsigned int left, right;
-
        if (!group_info)
                return 0;
 
-       left = 0;
-       right = group_info->ngroups;
-       while (left < right) {
-               unsigned int mid = (left+right)/2;
-               if (gid_gt(grp, group_info->gid[mid]))
-                       left = mid + 1;
-               else if (gid_lt(grp, group_info->gid[mid]))
-                       right = mid;
-               else
-                       return 1;
-       }
+       if (bsearch(&grp, group_info->gid, group_info->ngroups,
+                   sizeof(*group_info->gid), gid_cmp))
+               return 1;
        return 0;
 }
 
-- 
2.21.0