[PATCH v2] riscv: entry: always initialize regs->a0 to -ENOSYS

[patchwork-bot+linux-riscv at kernel.org]

Hello:

This patch was applied to riscv/linux.git (fixes)
by Palmer Dabbelt <palmer at rivosinc.com>:

On Thu, 27 Jun 2024 22:23:39 +0800 you wrote:
> Otherwise when the tracer changes syscall number to -1, the kernel fails
> to initialize a0 with -ENOSYS and subsequently fails to return the error
> code of the failed syscall to userspace. For example, it will break
> strace syscall tampering.
> 
> Fixes: 52449c17bdd1 ("riscv: entry: set a0 = -ENOSYS only when syscall != -1")
> Reported-by: "Dmitry V. Levin" <ldv at strace.io>
> Reviewed-by: Björn Töpel <bjorn at rivosinc.com>
> Cc: stable at vger.kernel.org
> Signed-off-by: Celeste Liu <CoelacanthusHex at gmail.com>
> 
> [...]

Here is the summary with links:
  - [v2] riscv: entry: always initialize regs->a0 to -ENOSYS
    https://git.kernel.org/riscv/c/61119394631f

You are awesome, thank you!
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