From e5032709b29eb42568c3937a533898728a15efa1 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Mon, 10 Jun 2013 13:37:14 +0200
Subject: [PATCH] utils: add bitfield inline ops

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
---
 utils.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/utils.h b/utils.h
index 71a4692..db6217e 100644
--- a/utils.h
+++ b/utils.h
@@ -22,6 +22,7 @@
 #include <sys/types.h>
 #include <sys/time.h>
 #include <stdint.h>
+#include <stdbool.h>
 #include <time.h>
 
 /*
@@ -151,4 +152,18 @@ void clock_gettime(int type, struct timespec *tv);
 #define __packed __attribute__((packed))
 #endif
 
+#ifndef BITS_PER_LONG
+#define BITS_PER_LONG (8 * sizeof(unsigned long))
+#endif
+
+static inline void bitfield_set(unsigned long *bits, int bit)
+{
+	bits[bit / BITS_PER_LONG] |= (1UL << (bit % BITS_PER_LONG));
+}
+
+static inline bool bitfield_test(unsigned long *bits, int bit)
+{
+	return !!(bits[bit / BITS_PER_LONG] & (1UL << (bit % BITS_PER_LONG)));
+}
+
 #endif