tree 0cddab2680085f478cf5c5c5b168143de90e8b30
parent 0735647c29bca5f33f38fcf457b3b0e9e5912f51
author Al Viro <viro@ZenIV.linux.org.uk> 1368122613 -0300
committer Mauro Carvalho Chehab <mchehab@redhat.com> 1369137416 -0300

[media] videobuf_vm_{open,close} race fixes

just use videobuf_queue_lock(map->q) to protect map->count; vm_area_operations
->open() and ->close() are called just under vma->vm_mm->mmap_sem, which
doesn't help the drivers at all, since clonal VMAs are normally in different
address spaces...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>