[PATCH v2] riscv: support update_mmu_tlb() for riscv

[Jinyu Tang]

Add macro definition to support updata_mmu_tlb() for riscv,
this function is from commit:7df676974359 ("mm/memory.c:Update
local TLB if PTE entry exists").

Signed-off-by: Jinyu Tang <tjytimi at 163.com>
Reviewed-by: Andrew Jones <ajones at ventanamicro.com>
---
v1 -> v2: 

Change the format with the help from Andrew Jones and Conor Dooley.

 arch/riscv/include/asm/pgtable.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 7ec936910a96..c61ae83aadee 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -418,6 +418,9 @@ static inline void update_mmu_cache(struct vm_area_struct *vma,
 	local_flush_tlb_page(address);
 }
 
+#define __HAVE_ARCH_UPDATE_MMU_TLB
+#define update_mmu_tlb update_mmu_cache
+
 static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
 		unsigned long address, pmd_t *pmdp)
 {
-- 
2.30.2