Re: [PATCH v4 8/9] mm/mremap: Allow arch runtime override
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2021-04-20 03:52:16
Also in:
linux-mm
"Aneesh Kumar K.V" [off-list ref] writes:
quoted hunk ↗ jump to hunk
Architectures like ppc64 support faster mremap only with radix translation. Hence allow a runtime check w.r.t support for fast mremap. Signed-off-by: Aneesh Kumar K.V <redacted> --- arch/powerpc/include/asm/tlb.h | 6 ++++++ mm/mremap.c | 15 ++++++++++++++- 2 files changed, 20 insertions(+), 1 deletion(-)diff --git a/arch/powerpc/include/asm/tlb.h b/arch/powerpc/include/asm/tlb.h index 160422a439aa..058918a7cd3c 100644 --- a/arch/powerpc/include/asm/tlb.h +++ b/arch/powerpc/include/asm/tlb.h@@ -83,5 +83,11 @@ static inline int mm_is_thread_local(struct mm_struct *mm) } #endif +#define arch_supports_page_tables_move arch_supports_page_tables_move +static inline bool arch_supports_page_tables_move(void) +{ + return radix_enabled(); +}
Not sure it's worth a respin on its own, but page table*s* move is slightly strange phrasing. arch_supports_move_page_tables() or arch_supports_page_table_move() would be more typical. cheers