linux-kernel - Re: [PATCH] sched/wait: introduce wait_event_freezable

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Date:   Fri, 18 Jan 2019 08:17:52 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Hugo Lefeuvre <hle@....eu.com>
Cc:     devel@...verdev.osuosl.org, Todd Kjos <tkjos@...roid.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Greg Hartman <ghartman@...gle.com>,
        linux-kernel@...r.kernel.org,
        Arve Hjønnevåg <arve@...roid.com>,
        Ingo Molnar <mingo@...hat.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Martijn Coenen <maco@...roid.com>,
        Alistair Strachan <strachan@...gle.com>,
        Christian Brauner <christian@...uner.io>
Subject: Re: [PATCH] sched/wait: introduce wait_event_freezable_hrtimeout

On Thu, Jan 17, 2019 at 11:41:35PM +0100, Hugo Lefeuvre wrote:
> introduce wait_event_freezable_hrtimeout, an interruptible and freezable
> version of wait_event_hrtimeout.
> 
> simplify handle_vsoc_cond_wait (drivers/staging/android/vsoc.c) using this
> newly added helper and remove useless includes.
> 
> Signed-off-by: Hugo Lefeuvre <hle@....eu.com>
> ---
>  drivers/staging/android/vsoc.c | 69 +++++-----------------------------
>  include/linux/wait.h           | 25 ++++++++++--

code in drivers/staging/ should be self-contained, and not, if at all
possible, ever force additional changes on "core" kernel code.

Are you sure that the vsoc code can't use one of the current wait
macros?  Why is it so special and unique that no one else in the kernel
has ever needed this before it came along?

thanks,

greg k-h