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driver core: Add a guard() definition for the device_lock()

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[ Upstream commit 134c6eaa60 ]

At present there are ~200 usages of device_lock() in the kernel. Some of
those usages lead to "goto unlock;" patterns which have proven to be
error prone. Define a "device" guard() definition to allow for those to
be cleaned up and prevent new ones from appearing.

Link: http://lore.kernel.org/r/657897453dda8_269bd29492@dwillia2-mobl3.amr.corp.intel.com.notmuch
Link: http://lore.kernel.org/r/6577b0c2a02df_a04c5294bb@dwillia2-xfh.jf.intel.com.notmuch
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Vishal Verma <vishal.l.verma@intel.com>
Link: https://lore.kernel.org/r/170250854466.1522182.17555361077409628655.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Williams 2023-12-13 15:02:35 -08:00 committed by Greg Kroah-Hartman
parent 1488b36926
commit 60e916d4b8
1 changed files with 2 additions and 0 deletions
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2
include/linux/device.h
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@ -1007,6 +1007,8 @@ static inline void device_unlock(struct device *dev)
mutex_unlock(&dev->mutex);
}
DEFINE_GUARD(device, struct device *, device_lock(_T), device_unlock(_T))
static inline void device_lock_assert(struct device *dev)
{
lockdep_assert_held(&dev->mutex);