linux-kernel - Re: arch/arm/kernel/sys_oabi-compat.c:251:51: sparse: sparse: incorrect type in argument 3 (different address spaces)

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Message-ID: <CAK8P3a0qKiaNHYVNDMA-NhOx8VJtsY9mOPE20Fy1Ms0pbjLydQ@mail.gmail.com>
Date:   Tue, 23 Nov 2021 17:08:01 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     kernel test robot <lkp@...el.com>
Cc:     Arnd Bergmann <arnd@...db.de>, kbuild-all@...ts.01.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Subject: Re: arch/arm/kernel/sys_oabi-compat.c:251:51: sparse: sparse:
 incorrect type in argument 3 (different address spaces)

On Tue, Nov 23, 2021 at 4:12 PM kernel test robot <lkp@...el.com> wrote:
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
>
>
> sparse warnings: (new ones prefixed by >>)
> >> arch/arm/kernel/sys_oabi-compat.c:251:51: sparse: sparse: incorrect type in argument 3 (different address spaces) @@     expected struct flock64 [noderef] __user *user @@     got struct flock64 * @@
>    arch/arm/kernel/sys_oabi-compat.c:251:51: sparse:     expected struct flock64 [noderef] __user *user
>    arch/arm/kernel/sys_oabi-compat.c:251:51: sparse:     got struct flock64 *
>    arch/arm/kernel/sys_oabi-compat.c:265:55: sparse: sparse: incorrect type in argument 4 (different address spaces) @@     expected struct flock64 [noderef] __user *user @@     got struct flock64 * @@
>    arch/arm/kernel/sys_oabi-compat.c:265:55: sparse:     expected struct flock64 [noderef] __user *user
>    arch/arm/kernel/sys_oabi-compat.c:265:55: sparse:     got struct flock64 *
>    arch/arm/kernel/sys_oabi-compat.c:292:23: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __poll_t [usertype] events @@     got unsigned int [addressable] [usertype] events @@
>    arch/arm/kernel/sys_oabi-compat.c:292:23: sparse:     expected restricted __poll_t [usertype] events
>    arch/arm/kernel/sys_oabi-compat.c:292:23: sparse:     got unsigned int [addressable] [usertype] events
>    arch/arm/kernel/sys_oabi-compat.c:312:21: sparse: sparse: incorrect type in initializer (different base types) @@     expected unsigned int __pu_val @@     got restricted __poll_t [usertype] revents @@
>    arch/arm/kernel/sys_oabi-compat.c:312:21: sparse:     expected unsigned int __pu_val
>    arch/arm/kernel/sys_oabi-compat.c:312:21: sparse:     got restricted __poll_t [usertype] revents

Thanks for the report. I see this was a pre-existing problem that now
shows up on
arm as well, sent a fix for it at

https://lore.kernel.org/linux-fsdevel/20211123160531.93545-1-arnd@kernel.org/T/

        Arnd