V4L/DVB (11242): allow v4l2 drivers to provide a get_unmapped_area handler
Shared memory mappings on nommu machines require a get_unmapped_area file operation that suggests an address for the mapping. This patch adds a way for v4l2 drivers to provide this callback. Signed-off-by: NDaniel Glöckner <dg@emlix.com> Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
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