From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Brian Cain" <bcain@codeaurora.org>
Subject: RE: [patch V3 08/20] hexagon: Remove mm.h from asm/uaccess.h
Date: Mon, 23 Mar 2020 16:46:17 -0500
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References: <20200321112544.878032781@linutronix.de> <20200321113241.531525286@linutronix.de>
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To: 'Thomas Gleixner' <tglx@linutronix.de>, 'LKML' <linux-kernel@vger.kernel.org>
Cc: 'Peter Zijlstra' <peterz@infradead.org>, 'Ingo Molnar' <mingo@kernel.org>, 'Sebastian Siewior' <bigeasy@linutronix.de>, 'Linus Torvalds' <torvalds@linux-foundation.org>, 'Joel Fernandes' <joel@joelfernandes.org>, 'Oleg Nesterov' <oleg@redhat.com>, 'Davidlohr Bueso' <dave@stgolabs.net>, 'kbuild test robot' <lkp@intel.com>, linux-hexagon@vger.kernel.org, 'Logan Gunthorpe' <logang@deltatee.com>, 'Bjorn Helgaas' <bhelgaas@google.com>, 'Kurt Schwemmer' <kurt.schwemmer@microsemi.com>, linux-pci@vger.kernel.org, 'Greg Kroah-Hartman' <gregkh@linuxfoundation.org>, 'Felipe Balbi' <balbi@kernel.org>, linux-usb@vger.kernel.org, 'Kalle Valo' <kvalo@codeaurora.org>, "'David S. Miller'" <davem@davemloft.net>, linux-wireless@vger.k

> -----Original Message-----
> From: Thomas Gleixner <tglx@linutronix.de>
...
> Subject: [patch V3 08/20] hexagon: Remove mm.h from asm/uaccess.h
> 
> From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> 
> The defconfig compiles without linux/mm.h. With mm.h included the include
> chain leands to:
> |   CC      kernel/locking/percpu-rwsem.o
> | In file included from include/linux/huge_mm.h:8,
> |                  from include/linux/mm.h:567,
> |                  from arch/hexagon/include/asm/uaccess.h:,
> |                  from include/linux/uaccess.h:11,
> |                  from include/linux/sched/task.h:11,
> |                  from include/linux/sched/signal.h:9,
> |                  from include/linux/rcuwait.h:6,
> |                  from include/linux/percpu-rwsem.h:8,
> |                  from kernel/locking/percpu-rwsem.c:6:
> | include/linux/fs.h:1422:29: error: array type has incomplete element type
> 'struct percpu_rw_semaphore'
> |  1422 |  struct percpu_rw_semaphore rw_sem[SB_FREEZE_LEVELS];
> 
> once rcuwait.h includes linux/sched/signal.h.
> 
> Remove the linux/mm.h include.
> 
> Reported-by: kbuild test robot <lkp@intel.com>
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> Cc: Brian Cain <bcain@codeaurora.org>
> Cc: linux-hexagon@vger.kernel.org
> ---
> V3: New patch
> ---
>  arch/hexagon/include/asm/uaccess.h | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/arch/hexagon/include/asm/uaccess.h
> b/arch/hexagon/include/asm/uaccess.h
> index 00cb38faad0c4..c1019a736ff13 100644
> --- a/arch/hexagon/include/asm/uaccess.h
> +++ b/arch/hexagon/include/asm/uaccess.h
> @@ -10,7 +10,6 @@
>  /*
>   * User space memory access functions
>   */
> -#include <linux/mm.h>
>  #include <asm/sections.h>
> 
>  /*
> --
> 2.26.0.rc2
> 

Acked-by: Brian Cain <bcain@codeaurora.org>