[PATCH v1] RISC-V: take text_mutex during alternative patching

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

Hello:

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

On Sun, 12 Feb 2023 19:47:36 +0000 you wrote:
> From: Conor Dooley <conor.dooley at microchip.com>
> 
> Guenter reported a splat during boot, that Samuel pointed out was the
> lockdep assertion failing in patch_insn_write():
> 
> WARNING: CPU: 0 PID: 0 at arch/riscv/kernel/patch.c:63 patch_insn_write+0x222/0x2f6
> epc : patch_insn_write+0x222/0x2f6
>  ra : patch_insn_write+0x21e/0x2f6
> epc : ffffffff800068c6 ra : ffffffff800068c2 sp : ffffffff81803df0
>  gp : ffffffff81a1ab78 tp : ffffffff81814f80 t0 : ffffffffffffe000
>  t1 : 0000000000000001 t2 : 4c45203a76637369 s0 : ffffffff81803e40
>  s1 : 0000000000000004 a0 : 0000000000000000 a1 : ffffffffffffffff
>  a2 : 0000000000000004 a3 : 0000000000000000 a4 : 0000000000000001
>  a5 : 0000000000000000 a6 : 0000000000000000 a7 : 0000000052464e43
>  s2 : ffffffff80b4889c s3 : 000000000000082c s4 : ffffffff80b48828
>  s5 : 0000000000000828 s6 : ffffffff8131a0a0 s7 : 0000000000000fff
>  s8 : 0000000008000200 s9 : ffffffff8131a520 s10: 0000000000000018
>  s11: 000000000000000b t3 : 0000000000000001 t4 : 000000000000000d
>  t5 : ffffffffd8180000 t6 : ffffffff81803bc8
> status: 0000000200000100 badaddr: 0000000000000000 cause: 0000000000000003
> [<ffffffff800068c6>] patch_insn_write+0x222/0x2f6
> [<ffffffff80006a36>] patch_text_nosync+0xc/0x2a
> [<ffffffff80003b86>] riscv_cpufeature_patch_func+0x52/0x98
> [<ffffffff80003348>] _apply_alternatives+0x46/0x86
> [<ffffffff80c02d36>] apply_boot_alternatives+0x3c/0xfa
> [<ffffffff80c03ad8>] setup_arch+0x584/0x5b8
> [<ffffffff80c0075a>] start_kernel+0xa2/0x8f8
> 
> [...]

Here is the summary with links:
  - [v1] RISC-V: take text_mutex during alternative patching
    https://git.kernel.org/riscv/c/9493e6f3ce02

You are awesome, thank you!
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