riscv: entry: Consolidate ret_from_kernel_thread into ret_from_fork

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The ret_from_kernel_thread() behaves similarly with ret_from_fork(),
the only difference is whether call the fn(arg) or not, this can be
achieved by testing fn is NULL or not, I.E s0 is 0 or not. Many
architectures have done the same thing, it makes entry.S more clean.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Björn Töpel <bjorn@rivosinc.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Tested-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Guo Ren <guoren@kernel.org>
Link: https://lore.kernel.org/r/20230222033021.983168-7-guoren@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

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Jisheng Zhang 2023-02-21 22:30:20 -05:00 • committed by Palmer Dabbelt

parent 0bf298ad2b

commit ab9164dae2

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16

arch/riscv/kernel/entry.S

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5

arch/riscv/kernel/process.c

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