From: Christoph Hellwig <hch@lst.de>
Date: Tue, 9 Jan 2018 14:00:36 +0000 (+0100)
Subject: riscv: don't read back satp in paging_init
X-Git-Tag: v4.16-rc1~45^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=372def1f934134cb391234ccdf23c21ae94343c2;p=thirdparty%2Fkernel%2Flinux.git

riscv: don't read back satp in paging_init

init_mm.pgd (aka swapped_pgd) gets relocated like all other kernel
symbols by the elf loader, so there is no need to reload it from satp.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
---

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index a6c0e8e7d8886..c77df8142be2e 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -41,8 +41,6 @@ void setup_zero_page(void)
 
 void __init paging_init(void)
 {
-	init_mm.pgd = (pgd_t *)pfn_to_virt(csr_read(sptbr));
-
 	setup_zero_page();
 	local_flush_tlb_all();
 	zone_sizes_init();