On 4/20/21 9:22 AM, Michael Ellerman wrote:
"Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx> writes:
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 <aneesh.kumar@xxxxxxxxxxxxx>
---
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.
I will switch to arch_supports_page_table_move()
-aneesh
