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Commit f31cc7e8 authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by David S. Miller
Browse files

flowcache: make flow_cache_hash_size() return "unsigned int" 



Hash size can't negative so "unsigned int" is logically correct.

Propagate "unsigned int" to loop counters.

Space savings:

	add/remove: 0/0 grow/shrink: 2/2 up/down: 6/-18 (-12)
	function                                     old     new   delta
	flow_cache_flush_tasklet                     362     365      +3
	__flow_cache_shrink                          333     336      +3
	flow_cache_cpu_up_prep                       178     171      -7
	flow_cache_lookup                           1159    1148     -11

Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5a17d9ed

net/core/flow.c

+8 −6
Original line number Diff line number Diff line
@@ -47,7 +47,7 @@ struct flow_flush_info { 


static struct kmem_cache *flow_cachep __read_mostly;



#define flow_cache_hash_size(cache)	(1 << (cache)->hash_shift)

#define flow_cache_hash_size(cache)	(1U << (cache)->hash_shift)

#define FLOW_HASH_RND_PERIOD		(10 * 60 * HZ)



static void flow_cache_new_hashrnd(unsigned long arg)
@@ -119,9 +119,10 @@ static void __flow_cache_shrink(struct flow_cache *fc, 
	struct flow_cache_entry *fle;

	struct hlist_node *tmp;

	LIST_HEAD(gc_list);

	int i, deleted = 0;

	int deleted = 0;

	struct netns_xfrm *xfrm = container_of(fc, struct netns_xfrm,

						flow_cache_global);

	unsigned int i;



	for (i = 0; i < flow_cache_hash_size(fc); i++) {

		int saved = 0;
@@ -295,9 +296,10 @@ static void flow_cache_flush_tasklet(unsigned long data) 
	struct flow_cache_entry *fle;

	struct hlist_node *tmp;

	LIST_HEAD(gc_list);

	int i, deleted = 0;

	int deleted = 0;

	struct netns_xfrm *xfrm = container_of(fc, struct netns_xfrm,

						flow_cache_global);

	unsigned int i;



	fcp = this_cpu_ptr(fc->percpu);

	for (i = 0; i < flow_cache_hash_size(fc); i++) {
@@ -327,7 +329,7 @@ static void flow_cache_flush_tasklet(unsigned long data) 
static int flow_cache_percpu_empty(struct flow_cache *fc, int cpu)

{

	struct flow_cache_percpu *fcp;

	int i;

	unsigned int i;



	fcp = per_cpu_ptr(fc->percpu, cpu);

	for (i = 0; i < flow_cache_hash_size(fc); i++)
@@ -402,12 +404,12 @@ void flow_cache_flush_deferred(struct net *net) 
static int flow_cache_cpu_prepare(struct flow_cache *fc, int cpu)

{

	struct flow_cache_percpu *fcp = per_cpu_ptr(fc->percpu, cpu);

	size_t sz = sizeof(struct hlist_head) * flow_cache_hash_size(fc);

	unsigned int sz = sizeof(struct hlist_head) * flow_cache_hash_size(fc);



	if (!fcp->hash_table) {

		fcp->hash_table = kzalloc_node(sz, GFP_KERNEL, cpu_to_node(cpu));

		if (!fcp->hash_table) {

			pr_err("NET: failed to allocate flow cache sz %zu\n", sz);

			pr_err("NET: failed to allocate flow cache sz %u\n", sz);

			return -ENOMEM;

		}

		fcp->hash_rnd_recalc = 1;