riscv: __asm_copy_to-from_user: Fix: fail on RV32

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Had a bug when converting bytes to bits when the cpu was rv32.

The a3 contains the number of bytes and multiple of 8
would be the bits. The LGREG is holding 2 for RV32 and 3 for
RV32, so to achieve multiple of 8 it must always be constant 3.
The 2 was mistakenly used for rv32.

Signed-off-by: Akira Tsukamoto <akira.tsukamoto@gmail.com>
Fixes: ca6eaaa210 ("riscv: __asm_copy_to-from_user: Optimize unaligned memory access and pipeline stall")
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

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Akira Tsukamoto 2021-07-20 17:51:45 +09:00 • committed by Palmer Dabbelt

parent 6010d300f9

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arch/riscv/lib/uaccess.S

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