cpumask: use find_first_and_bit()

Now we have an efficient implementation for find_first_and_bit(),
so switch cpumask to use it where appropriate.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index 1e7399f..c4e1b9e 100644 (file)
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -123,6 +123,12 @@ static inline unsigned int cpumask_first(const struct cpumask *srcp)
        return 0;
 }
 
+static inline unsigned int cpumask_first_and(const struct cpumask *srcp1,
+                                            const struct cpumask *srcp2)
+{
+       return 0;
+}
+
 static inline unsigned int cpumask_last(const struct cpumask *srcp)
 {
        return 0;
@@ -167,7 +173,7 @@ static inline unsigned int cpumask_local_spread(unsigned int i, int node)
 
 static inline int cpumask_any_and_distribute(const struct cpumask *src1p,
                                             const struct cpumask *src2p) {
-       return cpumask_next_and(-1, src1p, src2p);
+       return cpumask_first_and(src1p, src2p);
 }
 
 static inline int cpumask_any_distribute(const struct cpumask *srcp)
@@ -196,6 +202,19 @@ static inline unsigned int cpumask_first(const struct cpumask *srcp)
 }
 
 /**
+ * cpumask_first_and - return the first cpu from *srcp1 & *srcp2
+ * @src1p: the first input
+ * @src2p: the second input
+ *
+ * Returns >= nr_cpu_ids if no cpus set in both.  See also cpumask_next_and().
+ */
+static inline
+unsigned int cpumask_first_and(const struct cpumask *srcp1, const struct cpumask *srcp2)
+{
+       return find_first_and_bit(cpumask_bits(srcp1), cpumask_bits(srcp2), nr_cpumask_bits);
+}
+
+/**
  * cpumask_last - get the last CPU in a cpumask
  * @srcp:      - the cpumask pointer
  *
@@ -586,15 +605,6 @@ static inline void cpumask_copy(struct cpumask *dstp,
 #define cpumask_any(srcp) cpumask_first(srcp)
 
 /**
- * cpumask_first_and - return the first cpu from *srcp1 & *srcp2
- * @src1p: the first input
- * @src2p: the second input
- *
- * Returns >= nr_cpu_ids if no cpus set in both.  See also cpumask_next_and().
- */
-#define cpumask_first_and(src1p, src2p) cpumask_next_and(-1, (src1p), (src2p))
-
-/**
  * cpumask_any_and - pick a "random" cpu from *mask1 & *mask2
  * @mask1: the first input cpumask
  * @mask2: the second input cpumask