[lkml]   [2008]   [Oct]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 2/2] video: simplify cx18_get_input() and ivtv get input()
On Monday 13 October 2008 23:40:48 Robert William Fuller wrote:
> Hans Verkuil wrote:
> > On Monday 13 October 2008 22:54:06 Németh Márton wrote:
> >> From: Márton Németh <>
> >>
> >> The cx18_get_input() and ivtv_get_input() are called
> >> once from the VIDIOC_ENUMINPUT ioctl() and once from
> >> the *_log_status() functions. In the first case the
> >> struct v4l2_input is already filled with zeros,
> >> so doing this again is unnecessary.
> >
> > And in the second case no one cares whether the struct is zeroed.
> > And the same situation is also true for ivtv_get_output().
> Yeah, 'cos there's nothing better than uninitialized fields, like the
> recent report of a control that returns minimum and maximum values of
> zero, but a step-size of 9. Why are we optimizing code paths that
> are not performance critical by uninitializing memory?

It's already initialized to 0 in v4l2-ioctl.c. No need to do it twice.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2008-10-13 23:53    [W:0.107 / U:2.980 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site