The patch titled
Subject: kthread: export kthread functions
has been added to the -mm tree. Its filename is
kthread-export-kthread-functions.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kthread-export-kthread-functions.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kthread-export-kthread-functions.patch
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------------------------------------------------------
From: David Kershner <david.kershner@xxxxxxxxxx>
Subject: kthread: export kthread functions
The s-Par visornic driver, currently in staging, processes a queue being
serviced by the an s-Par service partition. We can get a message that
something has happened with the Service Partition, when that happens, we
must not access the channel until we get a message that the service
partition is back again.
The visornic driver has a thread for processing the channel, when we get
the message, we need to be able to park the thread and then resume it when
the problem clears.
We can do this with kthread_park and unpark but they are not exported from
the kernel, this patch exports the needed functions.
Signed-off-by: David Kershner <david.kershner@xxxxxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxxxxx>
Acked-by: Neil Horman <nhorman@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Richard Weinberger <richard.weinberger@xxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/kthread.c | 4 ++++
1 file changed, 4 insertions(+)
diff -puN kernel/kthread.c~kthread-export-kthread-functions kernel/kthread.c
--- a/kernel/kthread.c~kthread-export-kthread-functions
+++ a/kernel/kthread.c
@@ -97,6 +97,7 @@ bool kthread_should_park(void)
{
return test_bit(KTHREAD_SHOULD_PARK, &to_kthread(current)->flags);
}
+EXPORT_SYMBOL_GPL(kthread_should_park);
/**
* kthread_freezable_should_stop - should this freezable kthread return now?
@@ -171,6 +172,7 @@ void kthread_parkme(void)
{
__kthread_parkme(to_kthread(current));
}
+EXPORT_SYMBOL_GPL(kthread_parkme);
static int kthread(void *_create)
{
@@ -411,6 +413,7 @@ void kthread_unpark(struct task_struct *
if (kthread)
__kthread_unpark(k, kthread);
}
+EXPORT_SYMBOL_GPL(kthread_unpark);
/**
* kthread_park - park a thread created by kthread_create().
@@ -441,6 +444,7 @@ int kthread_park(struct task_struct *k)
}
return ret;
}
+EXPORT_SYMBOL_GPL(kthread_park);
/**
* kthread_stop - stop a thread created by kthread_create().
_
Patches currently in -mm which might be from david.kershner@xxxxxxxxxx are
kthread-export-kthread-functions.patch
linux-next.patch
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