[patch v6 1/7] genirq/affinity: Code consolidation

[Thomas Gleixner <tglx@linutronix.de>]

All information and calculations in the interrupt affinity spreading code
is strictly unsigned int. Though the code uses int all over the place.

Convert it over to unsigned int.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 include/linux/interrupt.h |   20 +++++++++-------
 kernel/irq/affinity.c     |   56 ++++++++++++++++++++++------------------------
 2 files changed, 38 insertions(+), 38 deletions(-)

--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -251,10 +251,10 @@ struct irq_affinity_notify {
  * @sets:		Number of affinitized sets
  */
 struct irq_affinity {
-	int	pre_vectors;
-	int	post_vectors;
-	int	nr_sets;
-	int	*sets;
+	unsigned int	pre_vectors;
+	unsigned int	post_vectors;
+	unsigned int	nr_sets;
+	unsigned int	*sets;
 };
 
 /**
@@ -314,9 +314,10 @@ extern int
 irq_set_affinity_notifier(unsigned int irq, struct irq_affinity_notify *notify);
 
 struct irq_affinity_desc *
-irq_create_affinity_masks(int nvec, const struct irq_affinity *affd);
+irq_create_affinity_masks(unsigned int nvec, const struct irq_affinity *affd);
 
-int irq_calc_affinity_vectors(int minvec, int maxvec, const struct irq_affinity *affd);
+unsigned int irq_calc_affinity_vectors(unsigned int minvec, unsigned int maxvec,
+				       const struct irq_affinity *affd);
 
 #else /* CONFIG_SMP */
 
@@ -350,13 +351,14 @@ irq_set_affinity_notifier(unsigned int i
 }
 
 static inline struct irq_affinity_desc *
-irq_create_affinity_masks(int nvec, const struct irq_affinity *affd)
+irq_create_affinity_masks(unsigned int nvec, const struct irq_affinity *affd)
 {
 	return NULL;
 }
 
-static inline int
-irq_calc_affinity_vectors(int minvec, int maxvec, const struct irq_affinity *affd)
+static inline unsigned int
+irq_calc_affinity_vectors(unsigned int minvec, unsigned int maxvec,
+			  const struct irq_affinity *affd)
 {
 	return maxvec;
 }
--- a/kernel/irq/affinity.c
+++ b/kernel/irq/affinity.c
@@ -9,7 +9,7 @@
 #include <linux/cpu.h>
 
 static void irq_spread_init_one(struct cpumask *irqmsk, struct cpumask *nmsk,
-				int cpus_per_vec)
+				unsigned int cpus_per_vec)
 {
 	const struct cpumask *siblmsk;
 	int cpu, sibl;
@@ -95,15 +95,17 @@ static int get_nodes_in_cpumask(cpumask_
 }
 
 static int __irq_build_affinity_masks(const struct irq_affinity *affd,
-				      int startvec, int numvecs, int firstvec,
+				      unsigned int startvec,
+				      unsigned int numvecs,
+				      unsigned int firstvec,
 				      cpumask_var_t *node_to_cpumask,
 				      const struct cpumask *cpu_mask,
 				      struct cpumask *nmsk,
 				      struct irq_affinity_desc *masks)
 {
-	int n, nodes, cpus_per_vec, extra_vecs, done = 0;
-	int last_affv = firstvec + numvecs;
-	int curvec = startvec;
+	unsigned int n, nodes, cpus_per_vec, extra_vecs, done = 0;
+	unsigned int last_affv = firstvec + numvecs;
+	unsigned int curvec = startvec;
 	nodemask_t nodemsk = NODE_MASK_NONE;
 
 	if (!cpumask_weight(cpu_mask))
@@ -117,18 +119,16 @@ static int __irq_build_affinity_masks(co
 	 */
 	if (numvecs <= nodes) {
 		for_each_node_mask(n, nodemsk) {
-			cpumask_or(&masks[curvec].mask,
-					&masks[curvec].mask,
-					node_to_cpumask[n]);
+			cpumask_or(&masks[curvec].mask, &masks[curvec].mask,
+				   node_to_cpumask[n]);
 			if (++curvec == last_affv)
 				curvec = firstvec;
 		}
-		done = numvecs;
-		goto out;
+		return numvecs;
 	}
 
 	for_each_node_mask(n, nodemsk) {
-		int ncpus, v, vecs_to_assign, vecs_per_node;
+		unsigned int ncpus, v, vecs_to_assign, vecs_per_node;
 
 		/* Spread the vectors per node */
 		vecs_per_node = (numvecs - (curvec - firstvec)) / nodes;
@@ -163,8 +163,6 @@ static int __irq_build_affinity_masks(co
 			curvec = firstvec;
 		--nodes;
 	}
-
-out:
 	return done;
 }
 
@@ -174,13 +172,14 @@ static int __irq_build_affinity_masks(co
  *	2) spread other possible CPUs on these vectors
  */
 static int irq_build_affinity_masks(const struct irq_affinity *affd,
-				    int startvec, int numvecs, int firstvec,
+				    unsigned int startvec, unsigned int numvecs,
+				    unsigned int firstvec,
 				    struct irq_affinity_desc *masks)
 {
-	int curvec = startvec, nr_present, nr_others;
-	int ret = -ENOMEM;
-	cpumask_var_t nmsk, npresmsk;
+	unsigned int curvec = startvec, nr_present, nr_others;
 	cpumask_var_t *node_to_cpumask;
+	cpumask_var_t nmsk, npresmsk;
+	int ret = -ENOMEM;
 
 	if (!zalloc_cpumask_var(&nmsk, GFP_KERNEL))
 		return ret;
@@ -239,12 +238,10 @@ static int irq_build_affinity_masks(cons
  * Returns the irq_affinity_desc pointer or NULL if allocation failed.
  */
 struct irq_affinity_desc *
-irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd)
+irq_create_affinity_masks(unsigned int nvecs, const struct irq_affinity *affd)
 {
-	int affvecs = nvecs - affd->pre_vectors - affd->post_vectors;
-	int curvec, usedvecs;
+	unsigned int affvecs, curvec, usedvecs, nr_sets, i;
 	struct irq_affinity_desc *masks = NULL;
-	int i, nr_sets;
 
 	/*
 	 * If there aren't any vectors left after applying the pre/post
@@ -264,16 +261,17 @@ irq_create_affinity_masks(int nvecs, con
 	 * Spread on present CPUs starting from affd->pre_vectors. If we
 	 * have multiple sets, build each sets affinity mask separately.
 	 */
+	affvecs = nvecs - affd->pre_vectors - affd->post_vectors;
 	nr_sets = affd->nr_sets;
 	if (!nr_sets)
 		nr_sets = 1;
 
 	for (i = 0, usedvecs = 0; i < nr_sets; i++) {
-		int this_vecs = affd->sets ? affd->sets[i] : affvecs;
+		unsigned int this_vecs = affd->sets ? affd->sets[i] : affvecs;
 		int ret;
 
 		ret = irq_build_affinity_masks(affd, curvec, this_vecs,
-						curvec, masks);
+					       curvec, masks);
 		if (ret) {
 			kfree(masks);
 			return NULL;
@@ -303,17 +301,17 @@ irq_create_affinity_masks(int nvecs, con
  * @maxvec:	The maximum number of vectors available
  * @affd:	Description of the affinity requirements
  */
-int irq_calc_affinity_vectors(int minvec, int maxvec, const struct irq_affinity *affd)
+unsigned int irq_calc_affinity_vectors(unsigned int minvec, unsigned int maxvec,
+				       const struct irq_affinity *affd)
 {
-	int resv = affd->pre_vectors + affd->post_vectors;
-	int vecs = maxvec - resv;
-	int set_vecs;
+	unsigned int resv = affd->pre_vectors + affd->post_vectors;
+	unsigned int set_vecs;
 
 	if (resv > minvec)
 		return 0;
 
 	if (affd->nr_sets) {
-		int i;
+		unsigned int i;
 
 		for (i = 0, set_vecs = 0;  i < affd->nr_sets; i++)
 			set_vecs += affd->sets[i];
@@ -323,5 +321,5 @@ int irq_calc_affinity_vectors(int minvec
 		put_online_cpus();
 	}
 
-	return resv + min(set_vecs, vecs);
+	return resv + min(set_vecs, maxvec - resv);
 }