linux-kernel - Re: [RFC PATCH for-next 2/4] epoll: epoll() syscall declaration

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Message-ID: <CAJ3m7BrjXvCOD_JpBHO7-ZuHFycr=GCrBiW2S1gfN4Ms-9h-Hw@mail.gmail.com>
Date:	Sun, 23 Feb 2014 21:44:09 -0800
From:	Nathaniel Yazdani <n1ght.4nd.d4y@...il.com>
To:	Eric Wong <normalperson@...t.net>
Cc:	viro@...iv.linux.org.uk, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH for-next 2/4] epoll: epoll() syscall declaration

On Sun, Feb 23, 2014 at 9:32 PM, Eric Wong <normalperson@...t.net> wrote:
> Nathaniel Yazdani <n1ght.4nd.d4y@...il.com> wrote:
>> +asmlinkage long sys_epoll(int ep, struct epoll __user *in,
>> +                       unsigned int inc, struct epoll __user *out,
>> +                       unsigned int outc, int timeout);
>
> I can understand using the new struct for 'in', but 'out' could just be
> "struct epoll_event *" like sys_epoll_wait, right?
>
>>  asmlinkage long sys_epoll_wait(int epfd, struct epoll_event __user *events,

Yeah and I went back and forth on that, it just seemed to me that the
inconsistency could be confusing to others... maybe instead of defining a new
struct to begin with it might make me sense to just have an 'infd' array of file
descriptors in addition to an 'in' array of epoll_event struct
(obviously the length
of these would be identical).
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