[PATCH] riscv: tlb: Provide definition of tlb_flush() before including tlb.h

[PATCH] riscv: tlb: Provide definition of tlb_flush() before including tlb.h

[Guenter Roeck]

From: Will Deacon <will.deacon@arm.com>

As of commit fd1102f0aade ("mm: mmu_notifier fix for tlb_end_vma"),
asm-generic/tlb.h now calls tlb_flush() from a static inline function,
so we need to make sure that it's declared before #including the
asm-generic header in the arch header.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Fixes: fd1102f0aade ("mm: mmu_notifier fix for tlb_end_vma")
Signed-off-by: Will Deacon <will.deacon@arm.com>
[groeck: Use forward declaration instead of moving inline function]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 arch/riscv/include/asm/tlb.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/riscv/include/asm/tlb.h b/arch/riscv/include/asm/tlb.h
index c229509288ea..439dc7072e05 100644
--- a/arch/riscv/include/asm/tlb.h
+++ b/arch/riscv/include/asm/tlb.h
@@ -14,6 +14,10 @@
 #ifndef _ASM_RISCV_TLB_H
 #define _ASM_RISCV_TLB_H
 
+struct mmu_gather;
+
+static void tlb_flush(struct mmu_gather *tlb);
+
 #include <asm-generic/tlb.h>
 
 static inline void tlb_flush(struct mmu_gather *tlb)
-- 
2.7.4

[PATCH] riscv: tlb: Provide definition of tlb_flush() before including tlb.h

[Palmer Dabbelt]

On Fri, 24 Aug 2018 11:22:55 PDT (-0700), linux at roeck-us.net wrote:
> From: Will Deacon <will.deacon@arm.com>
>
> As of commit fd1102f0aade ("mm: mmu_notifier fix for tlb_end_vma"),
> asm-generic/tlb.h now calls tlb_flush() from a static inline function,
> so we need to make sure that it's declared before #including the
> asm-generic header in the arch header.
>
> Reported-by: Guenter Roeck <linux@roeck-us.net>
> Fixes: fd1102f0aade ("mm: mmu_notifier fix for tlb_end_vma")
> Signed-off-by: Will Deacon <will.deacon@arm.com>
> [groeck: Use forward declaration instead of moving inline function]
> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
> ---
>  arch/riscv/include/asm/tlb.h | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/arch/riscv/include/asm/tlb.h b/arch/riscv/include/asm/tlb.h
> index c229509288ea..439dc7072e05 100644
> --- a/arch/riscv/include/asm/tlb.h
> +++ b/arch/riscv/include/asm/tlb.h
> @@ -14,6 +14,10 @@
>  #ifndef _ASM_RISCV_TLB_H
>  #define _ASM_RISCV_TLB_H
>
> +struct mmu_gather;
> +
> +static void tlb_flush(struct mmu_gather *tlb);
> +
>  #include <asm-generic/tlb.h>
>
>  static inline void tlb_flush(struct mmu_gather *tlb)

Thanks!  I'm going to take this into my for-linus branch which I'm still hoping 
to tag today, pending my email queue.