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V4L/DVB (11242): allow v4l2 drivers to provide a get_unmapped_area handler

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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>
This commit is contained in:
Daniel Glöckner
2009-03-26 11:31:08 -03:00
committed by Mauro Carvalho Chehab
parent 8737f66e64
commit c01f1a5a24
2 changed files with 21 additions and 0 deletions
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include/media/v4l2-dev.h
+2
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@@ -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 *);