Messages in this thread Patch in this message | | | From | Michael Auchter <> | Subject | [RFC PATCH 2/3] driver core: add device_links_barrier | Date | Wed, 14 Oct 2020 14:36:14 -0500 |
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Add a barrier to wait for all device_links SRCU sections to complete.
Signed-off-by: Michael Auchter <michael.auchter@ni.com> --- drivers/base/core.c | 10 ++++++++++ include/linux/device.h | 1 + 2 files changed, 11 insertions(+)
diff --git a/drivers/base/core.c b/drivers/base/core.c index bb5806a2bd4c..ef4429c4b1f2 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -82,6 +82,11 @@ int device_links_read_lock_held(void) { return srcu_read_lock_held(&device_links_srcu); } + +void device_links_barrier(void) +{ + srcu_barrier(&device_links_srcu); +} #else /* !CONFIG_SRCU */ static DECLARE_RWSEM(device_links_lock); @@ -112,6 +117,11 @@ int device_links_read_lock_held(void) return lockdep_is_held(&device_links_lock); } #endif + +void device_links_barrier(void) +{ +} #endif /* !CONFIG_SRCU */ /** diff --git a/include/linux/device.h b/include/linux/device.h index 9e6ea8931a52..8c47e0beb308 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -977,6 +977,7 @@ void device_link_del(struct device_link *link); void device_link_remove(void *consumer, struct device *supplier); void device_links_supplier_sync_state_pause(void); void device_links_supplier_sync_state_resume(void); +void device_links_barrier(void); extern __printf(3, 4) int dev_err_probe(const struct device *dev, int err, const char *fmt, ...); -- 2.25.4
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