From: Hans Verkuil Date: Mon, 14 May 2012 14:28:44 +0000 (-0300) Subject: [media] v4l2-dev.h: add comment not to use V4L2_FL_LOCK_ALL_FOPS in new drivers X-Git-Tag: v3.5-rc1~104^2~163 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=47bd4bc1a2624939c9f4ba154a2c18abe9d6c614;p=pandora-kernel.git [media] v4l2-dev.h: add comment not to use V4L2_FL_LOCK_ALL_FOPS in new drivers This flag is for legacy drivers only and will go away in the future. A note regarding commit 5126f2590bee412e3053de851cb07f531e4be36a (v4l2-dev: add flag to have the core lock all file operations): That commit message suggests that by not taking the core lock for fops other than unlocked_ioctl all problems relating to AB-BA locking and mm->mmap_sem are solved. This is not the case. More work needs to be done by moving the core lock further down into video_ioctl2. It should only be taken after the copy_from/to_user calls are done. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- Reading git-diff-tree failed