riscv: don't read back satp in paging_init

Web:        https://git.kernel.org/torvalds/c/372def1f934134cb391234ccdf23c21ae94343c2
Commit:     372def1f934134cb391234ccdf23c21ae94343c2
Parent:     0ca7a0b7c13ecafd12b37a6793d3e302dfea0475
Refname:    refs/heads/master
Author:     Christoph Hellwig <[email protected]>
AuthorDate: Tue Jan 9 15:00:36 2018 +0100
Committer:  Palmer Dabbelt <[email protected]>
CommitDate: Tue Jan 30 19:16:07 2018 -0800

    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 <[email protected]>
    Signed-off-by: Palmer Dabbelt <[email protected]>
---
 arch/riscv/mm/init.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index a6c0e8e7d888..c77df8142be2 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));