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authorHans Verkuil <hverkuil@xs4all.nl>2011-01-08 09:38:02 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-03-22 16:37:58 -0300
commitdfddb2441f39e8c0254504516be35b854addf6fa (patch)
tree7fd4bade365e394e38aee0764adca945a5bf394d /scripts/Makefile.headersinst
parent73cb42068cff419e72456940c713ceb5efa68c2a (diff)
[media] v4l2-fh: add v4l2_fh_is_singular
Several drivers need to do something when the first filehandle is opened or the last filehandle is closed. Most implement some use count mechanism, but if they use v4l2_fh, then you can also just check if this is the only filehandle for the device node. A simple helper function can do this. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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