linux-kernel - Re: [PATCH v2] eventfd: add a uapi header for eventfd userspace APIs

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Message-ID: <ZIjM8BOVp3kSNZkn@casper.infradead.org>
Date:   Tue, 13 Jun 2023 21:09:20 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     wenyang.linux@...mail.com
Cc:     Alexander Viro <viro@...iv.linux.org.uk>,
        Jens Axboe <axboe@...nel.dk>,
        Christian Brauner <brauner@...nel.org>,
        Christoph Hellwig <hch@....de>, Dylan Yudaken <dylany@...com>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Eric Biggers <ebiggers@...gle.com>,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] eventfd: add a uapi header for eventfd userspace APIs

On Wed, Jun 14, 2023 at 12:59:11AM +0800, wenyang.linux@...mail.com wrote:
> +++ b/include/uapi/linux/eventfd.h
> @@ -0,0 +1,14 @@
> +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> +#ifndef _UAPI_LINUX_EVENTFD_H
> +#define _UAPI_LINUX_EVENTFD_H
> +
> +#include <linux/types.h>

Why do you need types.h?

> +/* For O_CLOEXEC and O_NONBLOCK */
> +#include <linux/fcntl.h>
> +
> +#define EFD_SEMAPHORE (1 << 0)
> +#define EFD_CLOEXEC O_CLOEXEC
> +#define EFD_NONBLOCK O_NONBLOCK
> +
> +#endif /* _UAPI_LINUX_EVENTFD_H */
> -- 
> 2.25.1
>