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authorDan Williams <dan.j.williams@intel.com>2012-07-09 19:33:25 -0700
committerJames Bottomley <JBottomley@Parallels.com>2012-07-20 09:05:54 +0100
commit2955b47d2c1983998a8c5915cb96884e67f7cb53 (patch)
treee21ace685c01c698f20b7cb81b0097519c2fa18c /include/linux/async.h
parent529f9a765509c2c141ecfee0c54e17bf9a6b8bc1 (diff)
downloadop-kernel-dev-2955b47d2c1983998a8c5915cb96884e67f7cb53.zip
op-kernel-dev-2955b47d2c1983998a8c5915cb96884e67f7cb53.tar.gz
[SCSI] async: introduce 'async_domain' type
This is in preparation for teaching async_synchronize_full() to sync all pending async work, and not just on the async_running domain. This conversion is functionally equivalent, just embedding the existing list in a new async_domain type. The .registered attribute is used in a later patch to distinguish between domains that want to be flushed by async_synchronize_full() versus those that only expect async_synchronize_{full|cookie}_domain to be used for flushing. [jejb: add async.h to scsi_priv.h for struct async_domain] Signed-off-by: Dan Williams <dan.j.williams@intel.com> Acked-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Tested-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'include/linux/async.h')
-rw-r--r--include/linux/async.h35
1 files changed, 31 insertions, 4 deletions
diff --git a/include/linux/async.h b/include/linux/async.h
index 68a9530..364e7ff 100644
--- a/include/linux/async.h
+++ b/include/linux/async.h
@@ -9,19 +9,46 @@
* as published by the Free Software Foundation; version 2
* of the License.
*/
+#ifndef __ASYNC_H__
+#define __ASYNC_H__
#include <linux/types.h>
#include <linux/list.h>
typedef u64 async_cookie_t;
typedef void (async_func_ptr) (void *data, async_cookie_t cookie);
+struct async_domain {
+ struct list_head node;
+ struct list_head domain;
+ int count;
+ unsigned registered:1;
+};
+
+/*
+ * domain participates in global async_synchronize_full
+ */
+#define ASYNC_DOMAIN(_name) \
+ struct async_domain _name = { .node = LIST_HEAD_INIT(_name.node), \
+ .domain = LIST_HEAD_INIT(_name.domain), \
+ .count = 0, \
+ .registered = 1 }
+
+/*
+ * domain is free to go out of scope as soon as all pending work is
+ * complete, this domain does not participate in async_synchronize_full
+ */
+#define ASYNC_DOMAIN_EXCLUSIVE(_name) \
+ struct async_domain _name = { .node = LIST_HEAD_INIT(_name.node), \
+ .domain = LIST_HEAD_INIT(_name.domain), \
+ .count = 0, \
+ .registered = 0 }
extern async_cookie_t async_schedule(async_func_ptr *ptr, void *data);
extern async_cookie_t async_schedule_domain(async_func_ptr *ptr, void *data,
- struct list_head *list);
+ struct async_domain *domain);
extern void async_synchronize_full(void);
-extern void async_synchronize_full_domain(struct list_head *list);
+extern void async_synchronize_full_domain(struct async_domain *domain);
extern void async_synchronize_cookie(async_cookie_t cookie);
extern void async_synchronize_cookie_domain(async_cookie_t cookie,
- struct list_head *list);
-
+ struct async_domain *domain);
+#endif
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