diff mbox series

[119/156] bitops: simplify get_count_order_long()

Message ID 20201016024833._HHE9Nf8E%akpm@linux-foundation.org (mailing list archive)
State New
Headers show
Series [001/156] device-dax/kmem: fix resource release | expand

Commit Message

Andrew Morton Oct. 16, 2020, 2:48 a.m. UTC
From: Wei Yang <richard.weiyang@linux.alibaba.com>
Subject: bitops: simplify get_count_order_long()

These two cases could be unified into one.

Link: https://lkml.kernel.org/r/20200807085837.11697-2-richard.weiyang@linux.alibaba.com
Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/bitops.h |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)
diff mbox series

Patch

--- a/include/linux/bitops.h~bitops-simplify-get_count_order_long
+++ a/include/linux/bitops.h
@@ -206,10 +206,7 @@  static inline int get_count_order_long(u
 {
 	if (l == 0UL)
 		return -1;
-	else if (l & (l - 1UL))
-		return (int)fls_long(l);
-	else
-		return (int)fls_long(l) - 1;
+	return (int)fls_long(--l);
 }
 
 /**