linux-kernel - Re: [PATCH 1/1] staging : android : sync : get_unused

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Date:	Mon, 29 Sep 2014 20:03:53 +0200
From:	Yann Droneaud <ydroneaud@...eya.com>
To:	Heinrich Schuchardt <xypron.glpk@....de>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Colin Cross <ccross@...roid.com>,
	John Stultz <john.stultz@...aro.org>,
	Daniel Vetter <daniel@...ll.ch>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Masanari Iida <standby24x7@...il.com>,
	Daeseok Youn <daeseok.youn@...il.com>,
	Maarten Lankhorst <maarten.lankhorst@...onical.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	Yann Droneaud <ydroneaud@...eya.com>
Subject: Re: [PATCH 1/1] staging : android : sync : get_unused_fd

Hi,

Le samedi 27 septembre 2014 à 10:52 +0200, Heinrich Schuchardt a écrit :
> sync.h recommends to use get_unused_fd which does not set
> O_CLOEXEC while the rest of the android tree uses
> get_unused_fd_flags and sets O_CLOEXEC.
> 
> The patch adjust the comment.
> 

I'd like to add this patch to my patchset which try to remove
get_unused_fd() in favor of get_unused_fd_flags():

http://lkml.kernel.org/r/cover.1411562410.git.ydroneaud@opteya.com

But having O_CLOEXEC is welcome but not strictly needed,
so I think the patch should be reworked to not require O_CLOEXEC.

> Signed-off-by: Heinrich Schuchardt <xypron.glpk@....de>
> ---
>  drivers/staging/android/sync.h | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/android/sync.h b/drivers/staging/android/sync.h
> index 66b0f43..a21b79f 100644
> --- a/drivers/staging/android/sync.h
> +++ b/drivers/staging/android/sync.h
> @@ -293,7 +293,8 @@ void sync_fence_put(struct sync_fence *fence);
>   * @fence:	fence to install
>   * @fd:		file descriptor in which to install the fence
>   *
> - * Installs @fence into @fd.  @fd's should be acquired through get_unused_fd().
> + * Installs @fence into @fd.  @fd's should be acquired through
> + * get_unused_fd_flags(O_CLOEXEC).

I think it will be better to have something like:

    get_unused_fd_flags(flags), with flags either provided by userspace
    or set to O_CLOEXEC.


>   */
>  void sync_fence_install(struct sync_fence *fence, int fd);
>  

Regards.

-- 
Yann Droneaud
OPTEYA


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