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Message-Id: <20200714201356.889176-7-daniel.m.jordan@oracle.com>
Date: Tue, 14 Jul 2020 16:13:56 -0400
From: Daniel Jordan <daniel.m.jordan@...cle.com>
To: Herbert Xu <herbert@...dor.apana.org.au>,
Steffen Klassert <steffen.klassert@...unet.com>
Cc: linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
Daniel Jordan <daniel.m.jordan@...cle.com>
Subject: [PATCH 6/6] padata: remove padata_parallel_queue
Only its reorder field is actually used now, so remove the struct and
embed @reorder directly in parallel_data.
No functional change, just a cleanup.
Signed-off-by: Daniel Jordan <daniel.m.jordan@...cle.com>
Cc: Herbert Xu <herbert@...dor.apana.org.au>
Cc: Steffen Klassert <steffen.klassert@...unet.com>
Cc: linux-crypto@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
include/linux/padata.h | 15 ++------------
kernel/padata.c | 46 ++++++++++++++++++------------------------
2 files changed, 22 insertions(+), 39 deletions(-)
diff --git a/include/linux/padata.h b/include/linux/padata.h
index 070a7d43e8af8..a433f13fc4bf7 100644
--- a/include/linux/padata.h
+++ b/include/linux/padata.h
@@ -66,17 +66,6 @@ struct padata_serial_queue {
struct parallel_data *pd;
};
-/**
- * struct padata_parallel_queue - The percpu padata parallel queue
- *
- * @reorder: List to wait for reordering after parallel processing.
- * @num_obj: Number of objects that are processed by this cpu.
- */
-struct padata_parallel_queue {
- struct padata_list reorder;
- atomic_t num_obj;
-};
-
/**
* struct padata_cpumask - The cpumasks for the parallel/serial workers
*
@@ -93,7 +82,7 @@ struct padata_cpumask {
* that depends on the cpumask in use.
*
* @ps: padata_shell object.
- * @pqueue: percpu padata queues used for parallelization.
+ * @reorder_list: percpu reorder lists
* @squeue: percpu padata queues used for serialuzation.
* @refcnt: Number of objects holding a reference on this parallel_data.
* @seq_nr: Sequence number of the parallelized data object.
@@ -105,7 +94,7 @@ struct padata_cpumask {
*/
struct parallel_data {
struct padata_shell *ps;
- struct padata_parallel_queue __percpu *pqueue;
+ struct padata_list __percpu *reorder_list;
struct padata_serial_queue __percpu *squeue;
atomic_t refcnt;
unsigned int seq_nr;
diff --git a/kernel/padata.c b/kernel/padata.c
index 1c0b97891edb8..16cb894dc272b 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -250,13 +250,11 @@ EXPORT_SYMBOL(padata_do_parallel);
static struct padata_priv *padata_find_next(struct parallel_data *pd,
bool remove_object)
{
- struct padata_parallel_queue *next_queue;
struct padata_priv *padata;
struct padata_list *reorder;
int cpu = pd->cpu;
- next_queue = per_cpu_ptr(pd->pqueue, cpu);
- reorder = &next_queue->reorder;
+ reorder = per_cpu_ptr(pd->reorder_list, cpu);
spin_lock(&reorder->lock);
if (list_empty(&reorder->list)) {
@@ -291,7 +289,7 @@ static void padata_reorder(struct parallel_data *pd)
int cb_cpu;
struct padata_priv *padata;
struct padata_serial_queue *squeue;
- struct padata_parallel_queue *next_queue;
+ struct padata_list *reorder;
/*
* We need to ensure that only one cpu can work on dequeueing of
@@ -339,9 +337,8 @@ static void padata_reorder(struct parallel_data *pd)
*/
smp_mb();
- next_queue = per_cpu_ptr(pd->pqueue, pd->cpu);
- if (!list_empty(&next_queue->reorder.list) &&
- padata_find_next(pd, false))
+ reorder = per_cpu_ptr(pd->reorder_list, pd->cpu);
+ if (!list_empty(&reorder->list) && padata_find_next(pd, false))
queue_work(pinst->serial_wq, &pd->reorder_work);
}
@@ -401,17 +398,16 @@ void padata_do_serial(struct padata_priv *padata)
{
struct parallel_data *pd = padata->pd;
int hashed_cpu = padata_cpu_hash(pd, padata->seq_nr);
- struct padata_parallel_queue *pqueue = per_cpu_ptr(pd->pqueue,
- hashed_cpu);
+ struct padata_list *reorder = per_cpu_ptr(pd->reorder_list, hashed_cpu);
struct padata_priv *cur;
- spin_lock(&pqueue->reorder.lock);
+ spin_lock(&reorder->lock);
/* Sort in ascending order of sequence number. */
- list_for_each_entry_reverse(cur, &pqueue->reorder.list, list)
+ list_for_each_entry_reverse(cur, &reorder->list, list)
if (cur->seq_nr < padata->seq_nr)
break;
list_add(&padata->list, &cur->list);
- spin_unlock(&pqueue->reorder.lock);
+ spin_unlock(&reorder->lock);
/*
* Ensure the addition to the reorder list is ordered correctly
@@ -553,17 +549,15 @@ static void padata_init_squeues(struct parallel_data *pd)
}
}
-/* Initialize all percpu queues used by parallel workers */
-static void padata_init_pqueues(struct parallel_data *pd)
+/* Initialize per-CPU reorder lists */
+static void padata_init_reorder_list(struct parallel_data *pd)
{
int cpu;
- struct padata_parallel_queue *pqueue;
+ struct padata_list *list;
for_each_cpu(cpu, pd->cpumask.pcpu) {
- pqueue = per_cpu_ptr(pd->pqueue, cpu);
-
- __padata_list_init(&pqueue->reorder);
- atomic_set(&pqueue->num_obj, 0);
+ list = per_cpu_ptr(pd->reorder_list, cpu);
+ __padata_list_init(list);
}
}
@@ -577,13 +571,13 @@ static struct parallel_data *padata_alloc_pd(struct padata_shell *ps)
if (!pd)
goto err;
- pd->pqueue = alloc_percpu(struct padata_parallel_queue);
- if (!pd->pqueue)
+ pd->reorder_list = alloc_percpu(struct padata_list);
+ if (!pd->reorder_list)
goto err_free_pd;
pd->squeue = alloc_percpu(struct padata_serial_queue);
if (!pd->squeue)
- goto err_free_pqueue;
+ goto err_free_reorder_list;
pd->ps = ps;
@@ -595,7 +589,7 @@ static struct parallel_data *padata_alloc_pd(struct padata_shell *ps)
cpumask_and(pd->cpumask.pcpu, pinst->cpumask.pcpu, cpu_online_mask);
cpumask_and(pd->cpumask.cbcpu, pinst->cpumask.cbcpu, cpu_online_mask);
- padata_init_pqueues(pd);
+ padata_init_reorder_list(pd);
padata_init_squeues(pd);
pd->seq_nr = -1;
atomic_set(&pd->refcnt, 1);
@@ -609,8 +603,8 @@ static struct parallel_data *padata_alloc_pd(struct padata_shell *ps)
free_cpumask_var(pd->cpumask.pcpu);
err_free_squeue:
free_percpu(pd->squeue);
-err_free_pqueue:
- free_percpu(pd->pqueue);
+err_free_reorder_list:
+ free_percpu(pd->reorder_list);
err_free_pd:
kfree(pd);
err:
@@ -621,7 +615,7 @@ static void padata_free_pd(struct parallel_data *pd)
{
free_cpumask_var(pd->cpumask.pcpu);
free_cpumask_var(pd->cpumask.cbcpu);
- free_percpu(pd->pqueue);
+ free_percpu(pd->reorder_list);
free_percpu(pd->squeue);
kfree(pd);
}
--
2.27.0
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