From: David Laight <David.Laight@ACULAB.COM>
To: 'Christoph Hellwig' <hch@lst.de>, Arnd Bergmann <arnd@arndb.de>
Cc: "linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
"linux-s390@vger.kernel.org" <linux-s390@vger.kernel.org>,
"linux-parisc@vger.kernel.org" <linux-parisc@vger.kernel.org>,
"x86@kernel.org" <x86@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mips@vger.kernel.org" <linux-mips@vger.kernel.org>,
Guo Ren <guoren@kernel.org>,
"sparclinux@vger.kernel.org" <sparclinux@vger.kernel.org>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: RE: [PATCH 5/5] compat: consolidate the compat_flock{,64} definition
Date: Tue, 11 Jan 2022 09:52:17 +0000 [thread overview]
Message-ID: <f69d570127db4f78a6b30e1775a020c4@AcuMS.aculab.com> (raw)
In-Reply-To: <20220111083515.502308-6-hch@lst.de>
From: Christoph Hellwig
> Sent: 11 January 2022 08:35
>
> Provide a single common definition for the compat_flock and
> compat_flock64 structures using the same tricks as for the native
> variants. Another extra define is added for the packing required on
> x86.
>
...
> /*
> - * IA32 uses 4 byte alignment for 64 bit quantities,
> - * so we need to pack this structure.
> + * IA32 uses 4 byte alignment for 64 bit quantities, so we need to pack the
> + * compat flock64 structure.
> */
...
> +#define __ARCH_NEED_COMPAT_FLOCK64_PACKED
Maybe:
#define __ARCH_COMPAT_FLOCK64_ATTR (packed),(aligned(4)
...
Delete this bit:
> +#ifdef __ARCH_NEED_COMPAT_FLOCK64_PACKED
> +#define __ARCH_COMPAT_FLOCK64_PACK __attribute__((packed))
> +#else
> +#define __ARCH_COMPAT_FLOCK64_PACK
> +#endif
...
> +struct compat_flock64 {
> + short l_type;
> + short l_whence;
> + compat_loff_t l_start;
> + compat_loff_t l_len;
> + compat_pid_t l_pid;
> +#ifdef __ARCH_COMPAT_FLOCK64_PAD
> + __ARCH_COMPAT_FLOCK64_PAD
> +#endif
> +} __ARCH_COMPAT_FLOCK64_PACK;
then:
#ifdef __ARCH_COMPAT_FLOCK64_ATTR
} __attribute__(__ARCH_COMPAT_FLOCK64_ATTR);
#else
};
#endif
Makes it a bit more like the xxx_PAD bits.
Although the trailing ; does cause a bit of grief.
David
-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)
next prev parent reply other threads:[~2022-01-11 9:52 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-11 8:35 consolidate the compat fcntl definitions Christoph Hellwig
2022-01-11 8:35 ` [PATCH 1/5] uapi: remove the unused HAVE_ARCH_STRUCT_FLOCK64 define Christoph Hellwig
2022-01-11 8:35 ` [PATCH 2/5] uapi: simplify __ARCH_FLOCK{,64}_PAD a little Christoph Hellwig
2022-01-11 8:35 ` [PATCH 3/5] uapi: merge the 32-bit mips struct flock into the generic one Christoph Hellwig
2022-01-11 8:35 ` [PATCH 4/5] uapi: always define F_GETLK64/F_SETLK64/F_SETLKW64 in fcntl.h Christoph Hellwig
2022-01-11 15:33 ` Arnd Bergmann
2022-01-12 2:08 ` Guo Ren
2022-01-12 7:56 ` Christoph Hellwig
2022-01-12 8:28 ` Arnd Bergmann
2022-01-12 11:15 ` Jeff Layton
2022-01-12 12:08 ` Arnd Bergmann
2022-01-12 16:09 ` Christoph Hellwig
2022-01-11 8:35 ` [PATCH 5/5] compat: consolidate the compat_flock{,64} definition Christoph Hellwig
2022-01-11 9:52 ` David Laight [this message]
2022-01-11 15:46 ` consolidate the compat fcntl definitions Arnd Bergmann
2022-01-12 9:56 ` Sergey Shtylyov
-- strict thread matches above, loose matches on Subject: below --
2022-01-31 6:49 consolidate the compat fcntl definitions v2 Christoph Hellwig
2022-01-31 6:49 ` [PATCH 5/5] compat: consolidate the compat_flock{,64} definition Christoph Hellwig
2021-04-12 8:55 consolidate the flock uapi definitions Christoph Hellwig
2021-04-12 8:55 ` [PATCH 5/5] compat: consolidate the compat_flock{,64} definition Christoph Hellwig
2021-04-12 9:37 ` David Laight
2021-04-12 10:53 ` David Laight
2021-04-12 11:26 ` Arnd Bergmann
2021-04-12 13:11 ` David Laight
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