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Subject[PATCH v2 2/3] dm: Export function dm_suspend_md()
Date
This patch exports function dm_suspend_md() which suspend mapped device so other
kernel drivers can use it and could suspend mapped device when needed.

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
---
drivers/md/dm.c | 6 ++++++
drivers/md/dm.h | 5 +++++
2 files changed, 11 insertions(+)

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 2caf492..03298ff 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -3343,6 +3343,12 @@ out:
return r;
}

+int dm_suspend_md(struct mapped_device *md)
+{
+ return dm_suspend(md, DM_SUSPEND_LOCKFS_FLAG);
+}
+EXPORT_SYMBOL_GPL(dm_suspend_md);
+
/*
* Internal suspend/resume works like userspace-driven suspend. It waits
* until all bios finish and prevents issuing new bios to the target drivers.
diff --git a/drivers/md/dm.h b/drivers/md/dm.h
index 6123c2b..528e5e0 100644
--- a/drivers/md/dm.h
+++ b/drivers/md/dm.h
@@ -151,6 +151,11 @@ int dm_test_deferred_remove_flag(struct mapped_device *md);
void dm_deferred_remove(void);

/*
+ * Suspend mapped_device
+ */
+int dm_suspend_md(struct mapped_device *md);
+
+/*
* The device-mapper can be driven through one of two interfaces;
* ioctl or filesystem, depending which patch you have applied.
*/
--
1.7.9.5
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