riscv: uaccess: Allow the last potential unrolled copy

When the dst buffer pointer points to the last accessible aligned addr, we
could still run another iteration of unrolled copy.

Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20240313103334.4036554-1-xiao.w.wang@intel.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

diff --git a/arch/riscv/lib/uaccess.S b/arch/riscv/lib/uaccess.S
index bc22c078aba81a8170506eddb8642d3353ac461c..64792a7ae72e8ae229f34b2d9bfd3e35dd137fc2 100644 (file)
--- a/arch/riscv/lib/uaccess.S
+++ b/arch/riscv/lib/uaccess.S
@@ -103,7 +103,7 @@ SYM_FUNC_START(fallback_scalar_usercopy)
        fixup REG_S   t4,  7*SZREG(a0), 10f
        addi    a0, a0, 8*SZREG
        addi    a1, a1, 8*SZREG
-       bltu    a0, t0, 2b
+       bleu    a0, t0, 2b
 
        addi    t0, t0, 8*SZREG /* revert to original value */
        j       .Lbyte_copy_tail