linux-kernel - Re: [PATCH] freezer: fix return value of freezable_schedule_timeout

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Message-Id: <201112272253.29446.rjw@sisk.pl>
Date:	Tue, 27 Dec 2011 22:53:29 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jeff Layton <jlayton@...hat.com>
Cc:	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] freezer: fix return value of freezable_schedule_timeout_killable

On Saturday, December 24, 2011, Jeff Layton wrote:
> ...it should return the return code from schedule_timeout_killable(),
> not the one from freezer_count().
> 
> All of the current callers ignore the return code so the bug is
> harmless but it's worth fixing.
> 
> Signed-off-by: Jeff Layton <jlayton@...hat.com>

Applied to linux-pm/pm-freezer, will be pushed for 3.3.

Thanks,
Rafael


> ---
>  include/linux/freezer.h |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/include/linux/freezer.h b/include/linux/freezer.h
> index 30f06c2..96b5b59 100644
> --- a/include/linux/freezer.h
> +++ b/include/linux/freezer.h
> @@ -122,9 +122,11 @@ static inline int freezer_should_skip(struct task_struct *p)
>  /* Like schedule_timeout_killable(), but should not block the freezer. */
>  #define freezable_schedule_timeout_killable(timeout)			\
>  ({									\
> +	long __retval;							\
>  	freezer_do_not_count();						\
> -	schedule_timeout_killable(timeout);				\
> +	__retval = schedule_timeout_killable(timeout);			\
>  	freezer_count();						\
> +	__retval;							\
>  })
>  
>  /*
> 

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