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rcu/tree: Simplify KFREE_BULK_MAX_ENTR macro

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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 <[email protected]>
Reviewed-by: Joel Fernandes (Google) <[email protected]>
Signed-off-by: Uladzislau Rezki (Sony) <[email protected]>
Signed-off-by: Joel Fernandes (Google) <[email protected]>
Signed-off-by: Paul E. McKenney <[email protected]>
This commit is contained in:
Uladzislau Rezki (Sony) authored and Paul E. McKenney committed 2020-06-29 11:59:25 -07:00
1 parent 446044eb9c
commit 3af8486281
1 file changed
+9 -8
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kernel/rcu/tree.c
+9 -8
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@@ -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