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riscv: uaccess: Allow the last potential unrolled copy

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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>
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Xiao Wang 2024-03-13 18:33:34 +08:00 committed by Palmer Dabbelt
parent 7e6eae24da
commit f1905946be
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1 changed files with 1 additions and 1 deletions
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arch/riscv/lib/uaccess.S
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@ -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