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: Daniel Glöckner <dg@emlix.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index e36faab8459b..2058dd45e915 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -40,6 +40,8 @@ struct v4l2_file_operations {
         unsigned int (*poll) (struct file *, struct poll_table_struct *);
         long (*ioctl) (struct file *, unsigned int, unsigned long);
         long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
+        unsigned long (*get_unmapped_area) (struct file *, unsigned long,
+                                unsigned long, unsigned long, unsigned long);
         int (*mmap) (struct file *, struct vm_area_struct *);
         int (*open) (struct file *);
         int (*release) (struct file *);