linux-kernel - RE: [PATCH 8/9] select/restart_block: Convert poll's timeout to u64

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Date:   Mon, 9 Sep 2019 13:07:52 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Dmitry Safonov' <dima@...sta.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Dmitry Safonov <0x7f454c46@...il.com>,
        Adrian Reber <adrian@...as.de>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Andrei Vagin <avagin@...nvz.org>,
        Andy Lutomirski <luto@...nel.org>,
        Cyrill Gorcunov <gorcunov@...nvz.org>,
        Ingo Molnar <mingo@...hat.com>,
        Oleg Nesterov <oleg@...hat.com>,
        "Pavel Emelyanov" <xemul@...tuozzo.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "containers@...ts.linux-foundation.org" 
        <containers@...ts.linux-foundation.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>
Subject: RE: [PATCH 8/9] select/restart_block: Convert poll's timeout to u64

From: Dmitry Safonov
> Sent: 09 September 2019 11:24
> 
> All preparations have been done - now poll() can set u64 timeout in
> restart_block. It allows to do the next step - unifying all timeouts in
> restart_block and provide ptrace() API to read it.
> 
> Signed-off-by: Dmitry Safonov <dima@...sta.com>
> ---
>  fs/select.c                   | 27 +++++++--------------------
>  include/linux/restart_block.h |  4 +---
>  2 files changed, 8 insertions(+), 23 deletions(-)
> 
> diff --git a/fs/select.c b/fs/select.c
> index 4af88feaa2fe..ff2b9c4865cd 100644
> --- a/fs/select.c
> +++ b/fs/select.c
...
> @@ -1037,16 +1030,10 @@ SYSCALL_DEFINE3(poll, struct pollfd __user *, ufds, unsigned int, nfds,
>  		struct restart_block *restart_block;
> 
>  		restart_block = &current->restart_block;
> -		restart_block->fn = do_restart_poll;
> -		restart_block->poll.ufds = ufds;
> -		restart_block->poll.nfds = nfds;
> -
> -		if (timeout_msecs >= 0) {
> -			restart_block->poll.tv_sec = end_time.tv_sec;
> -			restart_block->poll.tv_nsec = end_time.tv_nsec;
> -			restart_block->poll.has_timeout = 1;
> -		} else
> -			restart_block->poll.has_timeout = 0;
> +		restart_block->fn		= do_restart_poll;
> +		restart_block->poll.ufds	= ufds;
> +		restart_block->poll.nfds	= nfds;
> +		restart_block->poll.timeout	= timeout;

What is all that whitespace for?

	David

-
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