linux-kernel - Re: [PATCH] riscv: Fix early ftrace nop patching

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Date: Thu, 23 May 2024 18:00:33 +0000
From: patchwork-bot+linux-riscv@...nel.org
To: Alexandre Ghiti <alexghiti@...osinc.com>
Cc: linux-riscv@...ts.infradead.org, paul.walmsley@...ive.com,
 palmer@...belt.com, aou@...s.berkeley.edu, rostedt@...dmis.org,
 mhiramat@...nel.org, mark.rutland@....com, parri.andrea@...il.com,
 bjorn@...osinc.com, conor.dooley@...rochip.com, linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH] riscv: Fix early ftrace nop patching

Hello:

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

On Thu, 23 May 2024 13:51:34 +0200 you wrote:
> Commit c97bf629963e ("riscv: Fix text patching when IPI are used")
> converted ftrace_make_nop() to use patch_insn_write() which does not
> emit any icache flush relying entirely on __ftrace_modify_code() to do
> that.
> 
> But we missed that ftrace_make_nop() was called very early directly when
> converting mcount calls into nops (actually on riscv it converts 2B nops
> emitted by the compiler into 4B nops).
> 
> [...]

Here is the summary with links:
  - riscv: Fix early ftrace nop patching
    https://git.kernel.org/riscv/c/6ca445d8af0e

You are awesome, thank you!
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