summaryrefslogtreecommitdiff
path: root/include/linux/padata.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/padata.h')
-rw-r--r--include/linux/padata.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/padata.h b/include/linux/padata.h
index b4da88f8588c..7302efff5e65 100644
--- a/include/linux/padata.h
+++ b/include/linux/padata.h
@@ -4,6 +4,9 @@
*
* Copyright (C) 2008, 2009 secunet Security Networks AG
* Copyright (C) 2008, 2009 Steffen Klassert <steffen.klassert@secunet.com>
+ *
+ * Copyright (c) 2020 Oracle and/or its affiliates.
+ * Author: Daniel Jordan <daniel.m.jordan@oracle.com>
*/
#ifndef PADATA_H
@@ -131,6 +134,31 @@ struct padata_shell {
};
/**
+ * struct padata_mt_job - represents one multithreaded job
+ *
+ * @thread_fn: Called for each chunk of work that a padata thread does.
+ * @fn_arg: The thread function argument.
+ * @start: The start of the job (units are job-specific).
+ * @size: size of this node's work (units are job-specific).
+ * @align: Ranges passed to the thread function fall on this boundary, with the
+ * possible exceptions of the beginning and end of the job.
+ * @min_chunk: The minimum chunk size in job-specific units. This allows
+ * the client to communicate the minimum amount of work that's
+ * appropriate for one worker thread to do at once.
+ * @max_threads: Max threads to use for the job, actual number may be less
+ * depending on task size and minimum chunk size.
+ */
+struct padata_mt_job {
+ void (*thread_fn)(unsigned long start, unsigned long end, void *arg);
+ void *fn_arg;
+ unsigned long start;
+ unsigned long size;
+ unsigned long align;
+ unsigned long min_chunk;
+ int max_threads;
+};
+
+/**
* struct padata_instance - The overall control structure.
*
* @cpu_online_node: Linkage for CPU online callback.
@@ -173,6 +201,7 @@ extern void padata_free_shell(struct padata_shell *ps);
extern int padata_do_parallel(struct padata_shell *ps,
struct padata_priv *padata, int *cb_cpu);
extern void padata_do_serial(struct padata_priv *padata);
+extern void __init padata_do_multithreaded(struct padata_mt_job *job);
extern int padata_set_cpumask(struct padata_instance *pinst, int cpumask_type,
cpumask_var_t cpumask);
extern int padata_start(struct padata_instance *pinst);