[PATCH 3/4] flowcache: make struct flow_cache_percpu::hash_rnd_recalc bool

[Alexey Dobriyan]

->hash_rnd_recalc is only used in boolean context.

Space savings on x86_64 come from the fact that "MOV rm8, imm8" is
shorter than "MOV rm32, imm32" by at least 3 bytes.

        add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-10 (-10)
        function                                     old     new   delta
        flow_cache_new_hashrnd                       166     163      -3
        flow_cache_cpu_up_prep                       171     168      -3
        flow_cache_lookup                           1148    1144      -4
        Total: Before=170822872, After=170822862, chg -0.00%

Signed-off-by: Alexey Dobriyan <adobri...@gmail.com>
---

 include/net/flowcache.h |    2 +-
 net/core/flow.c         |    6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

--- a/include/net/flowcache.h
+++ b/include/net/flowcache.h
@@ -10,7 +10,7 @@ struct flow_cache_percpu {
        struct hlist_head               *hash_table;
        int                             hash_count;
        u32                             hash_rnd;
-       int                             hash_rnd_recalc;
+       bool                            hash_rnd_recalc;
        struct tasklet_struct           flush_tasklet;
 };
 
--- a/net/core/flow.c
+++ b/net/core/flow.c
@@ -56,7 +56,7 @@ static void flow_cache_new_hashrnd(unsigned long arg)
        int i;
 
        for_each_possible_cpu(i)
-               per_cpu_ptr(fc->percpu, i)->hash_rnd_recalc = 1;
+               per_cpu_ptr(fc->percpu, i)->hash_rnd_recalc = true;
 
        fc->rnd_timer.expires = jiffies + FLOW_HASH_RND_PERIOD;
        add_timer(&fc->rnd_timer);
@@ -155,7 +155,7 @@ static void flow_new_hash_rnd(struct flow_cache *fc,
                              struct flow_cache_percpu *fcp)
 {
        get_random_bytes(&fcp->hash_rnd, sizeof(u32));
-       fcp->hash_rnd_recalc = 0;
+       fcp->hash_rnd_recalc = false;
        __flow_cache_shrink(fc, fcp, 0);
 }
 
@@ -412,7 +412,7 @@ static int flow_cache_cpu_prepare(struct flow_cache *fc, 
int cpu)
                        pr_err("NET: failed to allocate flow cache sz %u\n", 
sz);
                        return -ENOMEM;
                }
-               fcp->hash_rnd_recalc = 1;
+               fcp->hash_rnd_recalc = true;
                fcp->hash_count = 0;
                tasklet_init(&fcp->flush_tasklet, flow_cache_flush_tasklet, 0);
        }