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Subject: Re: [PATCH v2 10/23] microblaze: use asm-generic/mmu_context.h for
 no-op implementations
To:     Nicholas Piggin <npiggin@gmail.com>, linux-arch@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Arnd Bergmann <arnd@arndb.de>,
        Michal Simek <michal.simek@xilinx.com>
References: <20200826145249.745432-1-npiggin@gmail.com>
 <20200826145249.745432-11-npiggin@gmail.com>
From:   Michal Simek <monstr@monstr.eu>
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Message-ID: <4d2bdc87-f39c-3737-0aa8-b2efe7b2d93e@monstr.eu>
Date:   Mon, 31 Aug 2020 16:15:42 +0200
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On 26. 08. 20 16:52, Nicholas Piggin wrote:
> Cc: Michal Simek <monstr@monstr.eu>
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> ---
>  arch/microblaze/include/asm/mmu_context_mm.h | 8 ++++----
>  arch/microblaze/include/asm/processor.h      | 3 ---
>  2 files changed, 4 insertions(+), 7 deletions(-)
> 
> diff --git a/arch/microblaze/include/asm/mmu_context_mm.h b/arch/microblaze/include/asm/mmu_context_mm.h
> index a1c7dd48454c..c2c77f708455 100644
> --- a/arch/microblaze/include/asm/mmu_context_mm.h
> +++ b/arch/microblaze/include/asm/mmu_context_mm.h
> @@ -33,10 +33,6 @@
>     to represent all kernel pages as shared among all contexts.
>   */
>  
> -static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
> -{
> -}
> -
>  # define NO_CONTEXT	256
>  # define LAST_CONTEXT	255
>  # define FIRST_CONTEXT	1
> @@ -105,6 +101,7 @@ static inline void get_mmu_context(struct mm_struct *mm)
>  /*
>   * We're finished using the context for an address space.
>   */
> +#define destroy_context destroy_context
>  static inline void destroy_context(struct mm_struct *mm)
>  {
>  	if (mm->context != NO_CONTEXT) {
> @@ -126,6 +123,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
>   * After we have set current->mm to a new value, this activates
>   * the context for the new mm so we see the new mappings.
>   */
> +#define activate_mm activate_mm
>  static inline void activate_mm(struct mm_struct *active_mm,
>  			struct mm_struct *mm)
>  {
> @@ -136,5 +134,7 @@ static inline void activate_mm(struct mm_struct *active_mm,
>  
>  extern void mmu_context_init(void);
>  
> +#include <asm-generic/mmu_context.h>
> +
>  # endif /* __KERNEL__ */
>  #endif /* _ASM_MICROBLAZE_MMU_CONTEXT_H */
> diff --git a/arch/microblaze/include/asm/processor.h b/arch/microblaze/include/asm/processor.h
> index 1ff5a82b76b6..616211871a6e 100644
> --- a/arch/microblaze/include/asm/processor.h
> +++ b/arch/microblaze/include/asm/processor.h
> @@ -122,9 +122,6 @@ unsigned long get_wchan(struct task_struct *p);
>  #  define KSTK_EIP(task)	(task_pc(task))
>  #  define KSTK_ESP(task)	(task_sp(task))
>  
> -/* FIXME */
> -#  define deactivate_mm(tsk, mm)	do { } while (0)
> -
>  #  define STACK_TOP	TASK_SIZE
>  #  define STACK_TOP_MAX	STACK_TOP
>  
> 

I am fine with the patch but I pretty much don't like that commit
message is empty and there is only subject.
With fixing that you can add my:
Acked-by: Michal Simek <monstr@monstr.eu>

Thanks,
Michal

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP/Versal SoCs