linux-kernel - Re: [PATCH RESEND] arch/microblaze: add support for get

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Date:   Sun, 1 Sep 2019 06:49:29 +0000
From:   Leon Romanovsky <leonro@...lanox.com>
To:     Randy Dunlap <rdunlap@...radead.org>
CC:     LKML <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        "Steven J. Magnani" <steve@...idescorp.com>,
        Michal Simek <monstr@...str.eu>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Doug Ledford <dledford@...hat.com>
Subject: Re: [PATCH RESEND] arch/microblaze: add support for get_user() of
 size 8 bytes

On Sat, Aug 31, 2019 at 08:40:05PM -0700, Randy Dunlap wrote:
> From: Randy Dunlap <rdunlap@...radead.org>
>
> arch/microblaze/ is missing support for get_user() of size 8 bytes,
> so add it by using __copy_from_user().
>
> Fixes these build errors:
>    drivers/infiniband/core/uverbs_main.o: In function `ib_uverbs_write':
>    drivers/infiniband/core/.tmp_gl_uverbs_main.o:(.text+0x13a4): undefined reference to `__user_bad'
>    drivers/android/binder.o: In function `binder_thread_write':
>    drivers/android/.tmp_gl_binder.o:(.text+0xda6c): undefined reference to `__user_bad'
>    drivers/android/.tmp_gl_binder.o:(.text+0xda98): undefined reference to `__user_bad'
>    drivers/android/.tmp_gl_binder.o:(.text+0xdf10): undefined reference to `__user_bad'
>    drivers/android/.tmp_gl_binder.o:(.text+0xe498): undefined reference to `__user_bad'
>    drivers/android/binder.o:drivers/android/.tmp_gl_binder.o:(.text+0xea78): more undefined references to `__user_bad' follow
>
> 'make allmodconfig' now builds successfully for arch/microblaze/.
>
> Fixes: 538722ca3b76 ("microblaze: fix get_user/put_user side-effects")
> Reported-by: kbuild test robot <lkp@...el.com>
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Cc: Al Viro <viro@...iv.linux.org.uk>
> Cc: Steven J. Magnani <steve@...idescorp.com>
> Cc: Michal Simek <monstr@...str.eu>
> Cc: Jason Gunthorpe <jgg@...lanox.com>
> Cc: Leon Romanovsky <leonro@...lanox.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Cc: Doug Ledford <dledford@...hat.com>
> Reviewed-by: Leon Romanovsky <leonro@...lanox.com>
> ---
> What is a reasonable path for having this patch merged?
> Leon Romanovsky <leonro@...lanox.com> has tested it.

I tested it for compilation only, we (RDMA) don't work on
arch/microblaze/ at all and care about kbuild failures only.

Thanks