linux-kernel - Re: Build failures in -next due to commit "asm-generic: {get,put}

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Date:	Tue, 21 Jul 2015 14:57:44 +0900
From:	Yoshinori Sato <ysato@...rs.sourceforge.jp>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Arnd Bergmann <arnd@...db.de>,
	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
	Jens Axboe <axboe@...nel.dk>,
	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>
Subject: Re: Build failures in -next due to commit "asm-generic: {get,put}_user ptr argument evaluate only 1 time"

On Tue, 21 Jul 2015 04:56:21 +0900,
Guenter Roeck wrote:
> 
> Hi,
> 
> Commit 52b2512d507d ("asm-generic: {get,put}_user ptr argument evaluate only 1 time")
> causes the following compile error with various architectures (arc, arcv2, c6x, hexagon,
> um, unicore32) in -next.
> 
> block/scsi_ioctl.c: In function ‘sg_scsi_ioctl’:
> block/scsi_ioctl.c:436:2: error: invalid initializer
>   if (get_user(opcode, sic->data))
>   ^
> make[1]: *** [block/scsi_ioctl.o] Error 1
> 
> A possible fix would be to use &sic->data[0] instead, but I am not sure if this change
> in semantics of get_user would be acceptable.
> 
> Another failure due to the same commit is seen when building arc:axs103_defconfig.
> 
> fs/fat/dir.c: In function ‘fat_ioctl_filldir’:
> fs/fat/dir.c:752:43: error: invalid initializer
>  FAT_IOCTL_FILLDIR_FUNC(fat_ioctl_filldir, __fat_dirent)
> 
> This error is related to the put_user changes. No idea how to fix that one.
> 
> Guenter

Sorry. I misunderstand specification of get_user.
I'll send fixed patch.

-- 
Yoshinori Sato
<ysato@...rs.sourceforge.jp>
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