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| author | Bin Meng <bmeng.cn@gmail.com> | 2019-08-07 09:13:38 -0700 |
|---|---|---|
| committer | Paul Walmsley <paul.walmsley@sifive.com> | 2019-08-30 11:04:19 -0700 |
| commit | 4f3f90084673fa1d7f8e81b9dbee652d2fae3092 (patch) | |
| tree | a5abbf3544fa42ac8002295f45abaa4f70e2120f /arch/riscv/lib | |
| parent | 015b269337e66120179f2da428a5195ec7a4675f (diff) | |
| download | linux-4f3f90084673fa1d7f8e81b9dbee652d2fae3092.tar.gz linux-4f3f90084673fa1d7f8e81b9dbee652d2fae3092.tar.bz2 linux-4f3f90084673fa1d7f8e81b9dbee652d2fae3092.zip | |
riscv: Using CSR numbers to access CSRs
Since commit a3182c91ef4e ("RISC-V: Access CSRs using CSR numbers"),
we should prefer accessing CSRs using their CSR numbers, but there
are several leftovers like sstatus / sptbr we missed.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Diffstat (limited to 'arch/riscv/lib')
| -rw-r--r-- | arch/riscv/lib/uaccess.S | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/riscv/lib/uaccess.S b/arch/riscv/lib/uaccess.S index 399e6f0c2d98..ed2696c0143d 100644 --- a/arch/riscv/lib/uaccess.S +++ b/arch/riscv/lib/uaccess.S @@ -18,7 +18,7 @@ ENTRY(__asm_copy_from_user) /* Enable access to user memory */ li t6, SR_SUM - csrs sstatus, t6 + csrs CSR_SSTATUS, t6 add a3, a1, a2 /* Use word-oriented copy only if low-order bits match */ @@ -47,7 +47,7 @@ ENTRY(__asm_copy_from_user) 3: /* Disable access to user memory */ - csrc sstatus, t6 + csrc CSR_SSTATUS, t6 li a0, 0 ret 4: /* Edge case: unalignment */ @@ -72,7 +72,7 @@ ENTRY(__clear_user) /* Enable access to user memory */ li t6, SR_SUM - csrs sstatus, t6 + csrs CSR_SSTATUS, t6 add a3, a0, a1 addi t0, a0, SZREG-1 @@ -94,7 +94,7 @@ ENTRY(__clear_user) 3: /* Disable access to user memory */ - csrc sstatus, t6 + csrc CSR_SSTATUS, t6 li a0, 0 ret 4: /* Edge case: unalignment */ @@ -114,11 +114,11 @@ ENDPROC(__clear_user) /* Fixup code for __copy_user(10) and __clear_user(11) */ 10: /* Disable access to user memory */ - csrs sstatus, t6 + csrs CSR_SSTATUS, t6 mv a0, a2 ret 11: - csrs sstatus, t6 + csrs CSR_SSTATUS, t6 mv a0, a1 ret .previous |