linux-kernel - Re: [PATCH V2] riscv: ftrace: Fix the logic issue in DYNAMIC_FTRACE selection

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Message-ID: <7204f633-5b35-41ce-b847-7dfbaedbac47@ghiti.fr>
Date: Thu, 10 Jul 2025 16:32:57 +0200
From: Alexandre Ghiti <alex@...ti.fr>
To: Miao Chen <chenmiao.ku@...il.com>
Cc: kernel test robot <lkp@...el.com>,
 Linux RISCV <linux-riscv@...ts.infradead.org>,
 oe-kbuild-all@...ts.linux.dev, Paul Walmsley <paul.walmsley@...ive.com>,
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
 Steven Rostedt <rostedt@...dmis.org>, Masami Hiramatsu
 <mhiramat@...nel.org>, Mark Rutland <mark.rutland@....com>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Heiko Carstens <hca@...ux.ibm.com>, Pu Lehui <pulehui@...wei.com>,
 linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH V2] riscv: ftrace: Fix the logic issue in DYNAMIC_FTRACE
 selection

On 7/10/25 14:34, Miao Chen wrote:
> Hello Alex,
>
> Sure, I'll checkout it. Btw, this is my first commit, so can u tell
> how to reproduce failed case? Using the reproduce and .config.gz gived
> by build-bot?

Yes exactly!

>
> Thanks,
>
> Chen Miao
>
> Alexandre Ghiti <alex@...ti.fr> 于2025年7月10日周四 19:53写道：
>> Hi ChenMiao,
>>
>> On 7/9/25 03:08, kernel test robot wrote:
>>> Hi ChenMiao,
>>>
>>> kernel test robot noticed the following build errors:
>>>
>>> [auto build test ERROR on fda589c286040d9ba2d72a0eaf0a13945fc48026]
>>>
>>> url:    https://github.com/intel-lab-lkp/linux/commits/ChenMiao/riscv-ftrace-Fix-the-logic-issue-in-DYNAMIC_FTRACE-selection/20250706-231907
>>> base:   fda589c286040d9ba2d72a0eaf0a13945fc48026
>>> patch link:    https://lore.kernel.org/r/20250706151830.25091-1-chenmiao.ku%40gmail.com
>>> patch subject: [PATCH V2] riscv: ftrace: Fix the logic issue in DYNAMIC_FTRACE selection
>>> :::::: branch date: 2 days ago
>>> :::::: commit date: 2 days ago
>>> config: riscv-randconfig-r112-20250708 (attached as .config)
>>> compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
>>> reproduce: (attached as reproduce)
>>>
>>> If you fix the issue in a separate patch/commit (i.e. not just a new version of
>>> the same patch/commit), kindly add following tags
>>> | Reported-by: kernel test robot <lkp@...el.com>
>>> | Closes: https://lore.kernel.org/oe-kbuild-all/202507090650.YGY56SIA-lkp@intel.com/
>>>
>>> All errors (new ones prefixed by >>):
>>>
>>>>> <instantiation>:1:14: error: operand must be a symbol with %lo/%pcrel_lo/%tprel_lo modifier or an integer in the range [-2048, 2047]
>>>      addi sp, sp, -FREGS_SIZE_ON_STACK
>>>                   ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>>> <instantiation>:2:18: error: unexpected token
>>>       sw t0, FREGS_EPC(sp)
>>>                       ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:3:17: error: unexpected token
>>>       sw x1, FREGS_RA(sp)
>>>                      ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:7:17: error: unexpected token
>>>       sw x6, FREGS_T1(sp)
>>>                      ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:9:17: error: unexpected token
>>>       sw x7, FREGS_T2(sp)
>>>                      ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:10:18: error: unexpected token
>>>       sw x28, FREGS_T3(sp)
>>>                       ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:11:18: error: unexpected token
>>>       sw x29, FREGS_T4(sp)
>>>                       ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:12:18: error: unexpected token
>>>       sw x30, FREGS_T5(sp)
>>>                       ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:13:18: error: unexpected token
>>>       sw x31, FREGS_T6(sp)
>>>                       ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:16:18: error: unexpected token
>>>       sw x10, FREGS_A0(sp)
>>>                       ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:17:18: error: unexpected token
>>>       sw x11, FREGS_A1(sp)
>>>                       ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:18:18: error: unexpected token
>>>       sw x12, FREGS_A2(sp)
>>>                       ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:19:18: error: unexpected token
>>>       sw x13, FREGS_A3(sp)
>>>                       ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:20:18: error: unexpected token
>>>       sw x14, FREGS_A4(sp)
>>>                       ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:21:18: error: unexpected token
>>>       sw x15, FREGS_A5(sp)
>>>                       ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:22:18: error: unexpected token
>>>       sw x16, FREGS_A6(sp)
>>>                       ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:23:18: error: unexpected token
>>>       sw x17, FREGS_A7(sp)
>>>                       ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>       ^
>>>      <instantiation>:25:15: error: operand must be a symbol with %lo/%pcrel_lo/%tprel_lo modifier or an integer in the range [-2048, 2047]
>>>       addi a0, a0, FREGS_SIZE_ON_STACK
>>>                    ^
>>>      arch/riscv/kernel/mcount-dyn.S:185:2: note: while in macro instantiation
>>>       SAVE_ABI_REGS
>>>
>>> Kconfig warnings: (for reference only)
>>>      WARNING: unmet direct dependencies detected for DYNAMIC_FTRACE
>>>      Depends on [n]: FTRACE [=y] && FUNCTION_TRACER [=y] && HAVE_DYNAMIC_FTRACE [=n]
>>>      Selected by [y]:
>>>      - RISCV [=y] && FUNCTION_TRACER [=y]
>> To avoid that, we should check HAVE_DYNAMIC_FTRACE too:
>>
>> select DYNAMIC_FTRACE if FUNCTION_TRACER && HAVE_DYNAMIC_FTRACE
>>
>> That fixes the build error for me. Can you send a v3 with this change?
>>
>> Thanks,
>>
>> Alex
>>
>>
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