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| author | Uladzislau Rezki (Sony) <urezki@gmail.com> | 2020-05-25 23:47:49 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-06-29 20:59:25 +0200 |
| commit | 3af84862817403d317dc33312e7a88d76e79401a (patch) | |
| tree | c93878aa04e5566dba0eb9ec119fff9185757513 /kernel/rcu/tree.c | |
| parent | rcu/tree: Make debug_objects logic independent of rcu_head (diff) | |
| download | linux-3af84862817403d317dc33312e7a88d76e79401a.tar.xz linux-3af84862817403d317dc33312e7a88d76e79401a.zip | |
rcu/tree: Simplify KFREE_BULK_MAX_ENTR macro
We can simplify KFREE_BULK_MAX_ENTR macro and get rid of
magic numbers which were used to make the structure to be
exactly one page.
Suggested-by: Boqun Feng <boqun.feng@gmail.com>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu/tree.c')
| -rw-r--r-- | kernel/rcu/tree.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 143c1e9265b6..bcdc06364426 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -2958,13 +2958,6 @@ EXPORT_SYMBOL_GPL(call_rcu); #define KFREE_DRAIN_JIFFIES (HZ / 50) #define KFREE_N_BATCHES 2 -/* - * This macro defines how many entries the "records" array - * will contain. It is based on the fact that the size of - * kfree_rcu_bulk_data structure becomes exactly one page. - */ -#define KFREE_BULK_MAX_ENTR ((PAGE_SIZE / sizeof(void *)) - 3) - /** * struct kfree_rcu_bulk_data - single block to store kfree_rcu() pointers * @nr_records: Number of active pointers in the array @@ -2973,10 +2966,18 @@ EXPORT_SYMBOL_GPL(call_rcu); */ struct kfree_rcu_bulk_data { unsigned long nr_records; - void *records[KFREE_BULK_MAX_ENTR]; struct kfree_rcu_bulk_data *next; + void *records[]; }; +/* + * This macro defines how many entries the "records" array + * will contain. It is based on the fact that the size of + * kfree_rcu_bulk_data structure becomes exactly one page. + */ +#define KFREE_BULK_MAX_ENTR \ + ((PAGE_SIZE - sizeof(struct kfree_rcu_bulk_data)) / sizeof(void *)) + /** * struct kfree_rcu_cpu_work - single batch of kfree_rcu() requests * @rcu_work: Let queue_rcu_work() invoke workqueue handler after grace period |