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[PATCH] riscv: ftrace: Fix the logic issue in DYNAMIC_FTRACE selection

ChenMiao posted 1 patch 3 months ago
There is a newer version of this series
arch/riscv/Kconfig | 1 +
1 file changed, 1 insertion(+)
[PATCH] riscv: ftrace: Fix the logic issue in DYNAMIC_FTRACE selection
Posted by ChenMiao 3 months ago 
From: chenmiao <chenmiao.ku@gmail.com>

When I was reading the source code of ftrace, I learned that
ftrace has two types: static and dynamic. Initially, I planned
to prioritize reading the static source code, so I disabled
the enable dynamic option in RISCV.

[*]   Kernel Function Tracer
[ ]   Kernel Function Graph Tracer
[ ]   enable/disable function tracing dynamically (NEW)

However, when I tried to compile it, the build failed.

./include/linux/ftrace.h:190:16: error: implicit declaration of
function ‘arch_ftrace_get_regs’; did you mean ‘arch_ftrace_regs’?
[-Wimplicit-function-declaration]
  190 |         return arch_ftrace_get_regs(fregs);
      |                ^~~~~~~~~~~~~~~~~~~~
      |                arch_ftrace_regs

After comparing it with the ARM64 architecture, I found that
ARM64 automatically enables DYNAMIC_FTRACE by default once
FUNCTION_TRACER is turned on, and this cannot be set to "no".
Therefore, I believe the optional DYNAMIC_FTRACE setting in
RISC-V has a logic flaw—if FUNCTION_TRACER is enabled,
DYNAMIC_FTRACE should also be enabled, and vice versa. Moreover,
it's clear that RISC-V lacks the necessary support to successfully
compile the kernel when DYNAMIC_FTRACE is disabled.

[*]   Kernel Function Tracer
[ ]   Kernel Function Graph Tracer
-*-   enable/disable function tracing dynamically

Signed-off-by: chenmiao <chenmiao.ku@gmail.com>
---
 arch/riscv/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 36061f473..f7fc8b460 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -97,6 +97,7 @@ config RISCV
 	select CLONE_BACKWARDS
 	select COMMON_CLK
 	select CPU_PM if CPU_IDLE || HIBERNATION || SUSPEND
+	select DYNAMIC_FTRACE if FUNCTION_TRACER
 	select EDAC_SUPPORT
 	select FRAME_POINTER if PERF_EVENTS || (FUNCTION_TRACER && !DYNAMIC_FTRACE)
 	select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY if DYNAMIC_FTRACE
-- 
2.45.2
Re: [PATCH] riscv: ftrace: Fix the logic issue in DYNAMIC_FTRACE selection
Posted by kernel test robot 3 months ago 
Hi ChenMiao,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.16-rc4 next-20250704]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/ChenMiao/riscv-ftrace-Fix-the-logic-issue-in-DYNAMIC_FTRACE-selection/20250703-165308
base:   linus/master
patch link:    https://lore.kernel.org/r/20250703084818.394491-1-chenmiao.ku%40gmail.com
patch subject: [PATCH] riscv: ftrace: Fix the logic issue in DYNAMIC_FTRACE selection
config: riscv-randconfig-001-20250706 (https://download.01.org/0day-ci/archive/20250706/202507060946.JDTW8TlM-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250706/202507060946.JDTW8TlM-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507060946.JDTW8TlM-lkp@intel.com/

All errors (new ones prefixed by >>):

   arch/riscv/kernel/mcount-dyn.S: Assembler messages:
>> arch/riscv/kernel/mcount-dyn.S:85: Error: illegal operands `addi sp,sp,-FREGS_SIZE_ON_STACK'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:86: Error: illegal operands `sd t0,FREGS_EPC(sp)'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:87: Error: illegal operands `sd x1,FREGS_RA(sp)'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:91: Error: illegal operands `sd x6,FREGS_T1(sp)'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:100: Error: illegal operands `sd x10,FREGS_A0(sp)'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:101: Error: illegal operands `sd x11,FREGS_A1(sp)'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:102: Error: illegal operands `sd x12,FREGS_A2(sp)'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:103: Error: illegal operands `sd x13,FREGS_A3(sp)'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:104: Error: illegal operands `sd x14,FREGS_A4(sp)'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:105: Error: illegal operands `sd x15,FREGS_A5(sp)'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:106: Error: illegal operands `sd x16,FREGS_A6(sp)'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:107: Error: illegal operands `sd x17,FREGS_A7(sp)'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:109: Error: illegal operands `addi a0,a0,FREGS_SIZE_ON_STACK'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:110: Error: illegal operands `sd a0,FREGS_SP(sp)'
   arch/riscv/kernel/mcount-dyn.S:185:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:114: Error: illegal operands `ld t0,FREGS_EPC(sp)'
   arch/riscv/kernel/mcount-dyn.S:195:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:115: Error: illegal operands `ld x1,FREGS_RA(sp)'
   arch/riscv/kernel/mcount-dyn.S:195:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:119: Error: illegal operands `ld x6,FREGS_T1(sp)'
   arch/riscv/kernel/mcount-dyn.S:195:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:128: Error: illegal operands `ld x10,FREGS_A0(sp)'
   arch/riscv/kernel/mcount-dyn.S:195:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:129: Error: illegal operands `ld x11,FREGS_A1(sp)'
   arch/riscv/kernel/mcount-dyn.S:195:  Info: macro invoked from here
>> arch/riscv/kernel/mcount-dyn.S:130: Error: illegal operands `ld x12,FREGS_A2(sp)'
   arch/riscv/kernel/mcount-dyn.S:195:  Info: macro invoked from here
   arch/riscv/kernel/mcount-dyn.S:131: Error: illegal operands `ld x13,FREGS_A3(sp)'
   arch/riscv/kernel/mcount-dyn.S:195:  Info: macro invoked from here
   arch/riscv/kernel/mcount-dyn.S:132: Error: illegal operands `ld x14,FREGS_A4(sp)'
   arch/riscv/kernel/mcount-dyn.S:195:  Info: macro invoked from here
   arch/riscv/kernel/mcount-dyn.S:133: Error: illegal operands `ld x15,FREGS_A5(sp)'
   arch/riscv/kernel/mcount-dyn.S:195:  Info: macro invoked from here
   arch/riscv/kernel/mcount-dyn.S:134: Error: illegal operands `ld x16,FREGS_A6(sp)'
   arch/riscv/kernel/mcount-dyn.S:195:  Info: macro invoked from here
   arch/riscv/kernel/mcount-dyn.S:135: Error: illegal operands `ld x17,FREGS_A7(sp)'
   arch/riscv/kernel/mcount-dyn.S:195:  Info: macro invoked from here
   arch/riscv/kernel/mcount-dyn.S:137: Error: illegal operands `addi sp,sp,FREGS_SIZE_ON_STACK'
   arch/riscv/kernel/mcount-dyn.S:195:  Info: macro invoked from here

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]


vim +85 arch/riscv/kernel/mcount-dyn.S

afc76b8b8011218 Guo Ren        2020-12-17   27  
afc76b8b8011218 Guo Ren        2020-12-17   28  	.macro SAVE_ABI
afc76b8b8011218 Guo Ren        2020-12-17   29  	addi	sp, sp, -ABI_SIZE_ON_STACK
afc76b8b8011218 Guo Ren        2020-12-17   30  
afc76b8b8011218 Guo Ren        2020-12-17   31  	REG_S	a0, ABI_A0(sp)
afc76b8b8011218 Guo Ren        2020-12-17   32  	REG_S	a1, ABI_A1(sp)
afc76b8b8011218 Guo Ren        2020-12-17   33  	REG_S	a2, ABI_A2(sp)
afc76b8b8011218 Guo Ren        2020-12-17   34  	REG_S	a3, ABI_A3(sp)
afc76b8b8011218 Guo Ren        2020-12-17   35  	REG_S	a4, ABI_A4(sp)
afc76b8b8011218 Guo Ren        2020-12-17   36  	REG_S	a5, ABI_A5(sp)
afc76b8b8011218 Guo Ren        2020-12-17   37  	REG_S	a6, ABI_A6(sp)
afc76b8b8011218 Guo Ren        2020-12-17   38  	REG_S	a7, ABI_A7(sp)
6724a76cff85ee2 Guo Ren        2023-01-12   39  	REG_S	t0, ABI_T0(sp)
afc76b8b8011218 Guo Ren        2020-12-17   40  	REG_S	ra, ABI_RA(sp)
c15ac4fd60d5ffd Alan Kao       2018-02-13   41  	.endm
c15ac4fd60d5ffd Alan Kao       2018-02-13   42  
afc76b8b8011218 Guo Ren        2020-12-17   43  	.macro RESTORE_ABI
afc76b8b8011218 Guo Ren        2020-12-17   44  	REG_L	a0, ABI_A0(sp)
afc76b8b8011218 Guo Ren        2020-12-17   45  	REG_L	a1, ABI_A1(sp)
afc76b8b8011218 Guo Ren        2020-12-17   46  	REG_L	a2, ABI_A2(sp)
afc76b8b8011218 Guo Ren        2020-12-17   47  	REG_L	a3, ABI_A3(sp)
afc76b8b8011218 Guo Ren        2020-12-17   48  	REG_L	a4, ABI_A4(sp)
afc76b8b8011218 Guo Ren        2020-12-17   49  	REG_L	a5, ABI_A5(sp)
afc76b8b8011218 Guo Ren        2020-12-17   50  	REG_L	a6, ABI_A6(sp)
afc76b8b8011218 Guo Ren        2020-12-17   51  	REG_L	a7, ABI_A7(sp)
6724a76cff85ee2 Guo Ren        2023-01-12   52  	REG_L	t0, ABI_T0(sp)
afc76b8b8011218 Guo Ren        2020-12-17   53  	REG_L	ra, ABI_RA(sp)
afc76b8b8011218 Guo Ren        2020-12-17   54  
afc76b8b8011218 Guo Ren        2020-12-17   55  	addi	sp, sp, ABI_SIZE_ON_STACK
c15ac4fd60d5ffd Alan Kao       2018-02-13   56  	.endm
c15ac4fd60d5ffd Alan Kao       2018-02-13   57  
35e61e8827ee8ea Song Shuai     2023-11-30   58  /**
7caa9765465f60b Puranjay Mohan 2024-04-05   59  * SAVE_ABI_REGS - save regs against the ftrace_regs struct
35e61e8827ee8ea Song Shuai     2023-11-30   60  *
35e61e8827ee8ea Song Shuai     2023-11-30   61  * After the stack is established,
35e61e8827ee8ea Song Shuai     2023-11-30   62  *
35e61e8827ee8ea Song Shuai     2023-11-30   63  * 0(sp) stores the PC of the traced function which can be accessed
b2137c3b6d7a456 Andy Chiu      2025-04-08   64  * by &(fregs)->epc in tracing function.
35e61e8827ee8ea Song Shuai     2023-11-30   65  *
35e61e8827ee8ea Song Shuai     2023-11-30   66  * 8(sp) stores the function return address (i.e. parent IP) that
7caa9765465f60b Puranjay Mohan 2024-04-05   67  * can be accessed by &(fregs)->ra in tracing function.
35e61e8827ee8ea Song Shuai     2023-11-30   68  *
35e61e8827ee8ea Song Shuai     2023-11-30   69  * The other regs are saved at the respective localtion and accessed
7caa9765465f60b Puranjay Mohan 2024-04-05   70  * by the respective ftrace_regs member.
35e61e8827ee8ea Song Shuai     2023-11-30   71  *
35e61e8827ee8ea Song Shuai     2023-11-30   72  * Here is the layout of stack for your reference.
35e61e8827ee8ea Song Shuai     2023-11-30   73  *
35e61e8827ee8ea Song Shuai     2023-11-30   74  * PT_SIZE_ON_STACK  ->  +++++++++
35e61e8827ee8ea Song Shuai     2023-11-30   75  *                       + ..... +
35e61e8827ee8ea Song Shuai     2023-11-30   76  *                       + a0-a7 + --++++-> ftrace_caller saved
7caa9765465f60b Puranjay Mohan 2024-04-05   77  *                       + t1    + --++++-> direct tramp address
7caa9765465f60b Puranjay Mohan 2024-04-05   78  *                       + s0    + --+ // frame pointer
35e61e8827ee8ea Song Shuai     2023-11-30   79  *                       + sp    +   +
35e61e8827ee8ea Song Shuai     2023-11-30   80  *                       + ra    + --+ // parent IP
35e61e8827ee8ea Song Shuai     2023-11-30   81  *               sp  ->  + epc   + --+ // PC
35e61e8827ee8ea Song Shuai     2023-11-30   82  *                       +++++++++
35e61e8827ee8ea Song Shuai     2023-11-30   83  **/
7caa9765465f60b Puranjay Mohan 2024-04-05   84  	.macro SAVE_ABI_REGS
7caa9765465f60b Puranjay Mohan 2024-04-05  @85  	addi	sp, sp, -FREGS_SIZE_ON_STACK
7caa9765465f60b Puranjay Mohan 2024-04-05  @86  	REG_S	t0,  FREGS_EPC(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05  @87  	REG_S	x1,  FREGS_RA(sp)
35e61e8827ee8ea Song Shuai     2023-11-30   88  #ifdef HAVE_FUNCTION_GRAPH_FP_TEST
7caa9765465f60b Puranjay Mohan 2024-04-05   89  	REG_S	x8,  FREGS_S0(sp)
35e61e8827ee8ea Song Shuai     2023-11-30   90  #endif
7caa9765465f60b Puranjay Mohan 2024-04-05  @91  	REG_S	x6,  FREGS_T1(sp)
f8693f6dffcd186 Andy Chiu      2025-04-08   92  #ifdef CONFIG_CC_IS_CLANG
f8693f6dffcd186 Andy Chiu      2025-04-08   93  	REG_S	x7,  FREGS_T2(sp)
f8693f6dffcd186 Andy Chiu      2025-04-08   94  	REG_S	x28, FREGS_T3(sp)
f8693f6dffcd186 Andy Chiu      2025-04-08   95  	REG_S	x29, FREGS_T4(sp)
f8693f6dffcd186 Andy Chiu      2025-04-08   96  	REG_S	x30, FREGS_T5(sp)
f8693f6dffcd186 Andy Chiu      2025-04-08   97  	REG_S	x31, FREGS_T6(sp)
f8693f6dffcd186 Andy Chiu      2025-04-08   98  #endif
7caa9765465f60b Puranjay Mohan 2024-04-05   99  	// save the arguments
7caa9765465f60b Puranjay Mohan 2024-04-05 @100  	REG_S	x10, FREGS_A0(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @101  	REG_S	x11, FREGS_A1(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @102  	REG_S	x12, FREGS_A2(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @103  	REG_S	x13, FREGS_A3(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @104  	REG_S	x14, FREGS_A4(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @105  	REG_S	x15, FREGS_A5(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @106  	REG_S	x16, FREGS_A6(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @107  	REG_S	x17, FREGS_A7(sp)
b21cdb9523e5561 Andy Chiu      2025-04-08  108  	mv	a0, sp
b21cdb9523e5561 Andy Chiu      2025-04-08 @109  	addi	a0, a0, FREGS_SIZE_ON_STACK
b21cdb9523e5561 Andy Chiu      2025-04-08 @110  	REG_S	a0, FREGS_SP(sp)	// Put original SP on stack
bc1a4c3a8425568 Alan Kao       2018-02-13  111  	.endm
bc1a4c3a8425568 Alan Kao       2018-02-13  112  
b21cdb9523e5561 Andy Chiu      2025-04-08  113  	.macro RESTORE_ABI_REGS
7caa9765465f60b Puranjay Mohan 2024-04-05 @114  	REG_L	t0, FREGS_EPC(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @115  	REG_L	x1, FREGS_RA(sp)
35e61e8827ee8ea Song Shuai     2023-11-30  116  #ifdef HAVE_FUNCTION_GRAPH_FP_TEST
7caa9765465f60b Puranjay Mohan 2024-04-05  117  	REG_L	x8, FREGS_S0(sp)
35e61e8827ee8ea Song Shuai     2023-11-30  118  #endif
7caa9765465f60b Puranjay Mohan 2024-04-05 @119  	REG_L	x6,  FREGS_T1(sp)
f8693f6dffcd186 Andy Chiu      2025-04-08  120  #ifdef CONFIG_CC_IS_CLANG
f8693f6dffcd186 Andy Chiu      2025-04-08  121  	REG_L	x7,  FREGS_T2(sp)
f8693f6dffcd186 Andy Chiu      2025-04-08  122  	REG_L	x28, FREGS_T3(sp)
f8693f6dffcd186 Andy Chiu      2025-04-08  123  	REG_L	x29, FREGS_T4(sp)
f8693f6dffcd186 Andy Chiu      2025-04-08  124  	REG_L	x30, FREGS_T5(sp)
f8693f6dffcd186 Andy Chiu      2025-04-08  125  	REG_L	x31, FREGS_T6(sp)
f8693f6dffcd186 Andy Chiu      2025-04-08  126  #endif
7caa9765465f60b Puranjay Mohan 2024-04-05  127  	// restore the arguments
7caa9765465f60b Puranjay Mohan 2024-04-05 @128  	REG_L	x10, FREGS_A0(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @129  	REG_L	x11, FREGS_A1(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @130  	REG_L	x12, FREGS_A2(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @131  	REG_L	x13, FREGS_A3(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @132  	REG_L	x14, FREGS_A4(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @133  	REG_L	x15, FREGS_A5(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @134  	REG_L	x16, FREGS_A6(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05 @135  	REG_L	x17, FREGS_A7(sp)
7caa9765465f60b Puranjay Mohan 2024-04-05  136  
7caa9765465f60b Puranjay Mohan 2024-04-05  137  	addi	sp, sp, FREGS_SIZE_ON_STACK
afc76b8b8011218 Guo Ren        2020-12-17  138  	.endm
35e61e8827ee8ea Song Shuai     2023-11-30  139  
35e61e8827ee8ea Song Shuai     2023-11-30  140  	.macro PREPARE_ARGS
b2137c3b6d7a456 Andy Chiu      2025-04-08  141  	addi	a0, t0, -MCOUNT_JALR_SIZE	// ip (callsite's jalr insn)
b21cdb9523e5561 Andy Chiu      2025-04-08  142  #ifdef CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS
b21cdb9523e5561 Andy Chiu      2025-04-08  143  	mv 	a1, ra				// parent_ip
b21cdb9523e5561 Andy Chiu      2025-04-08  144  	REG_L   a2, -16(t0)			// op
b21cdb9523e5561 Andy Chiu      2025-04-08  145  	REG_L   ra, FTRACE_OPS_FUNC(a2)		// op->func
b21cdb9523e5561 Andy Chiu      2025-04-08  146  #else
b21cdb9523e5561 Andy Chiu      2025-04-08  147  	la	a1, function_trace_op
b21cdb9523e5561 Andy Chiu      2025-04-08  148  	REG_L	a2, 0(a1)			// op
b21cdb9523e5561 Andy Chiu      2025-04-08  149  	mv	a1, ra				// parent_ip
b21cdb9523e5561 Andy Chiu      2025-04-08  150  #endif
b21cdb9523e5561 Andy Chiu      2025-04-08  151  	mv	a3, sp				// regs
b21cdb9523e5561 Andy Chiu      2025-04-08  152  	.endm
b21cdb9523e5561 Andy Chiu      2025-04-08  153  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Re: [PATCH] riscv: ftrace: Fix the logic issue in DYNAMIC_FTRACE selection
Posted by kernel test robot 3 months ago 
Hi ChenMiao,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.16-rc4 next-20250703]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/ChenMiao/riscv-ftrace-Fix-the-logic-issue-in-DYNAMIC_FTRACE-selection/20250703-165308
base:   linus/master
patch link:    https://lore.kernel.org/r/20250703084818.394491-1-chenmiao.ku%40gmail.com
patch subject: [PATCH] riscv: ftrace: Fix the logic issue in DYNAMIC_FTRACE selection
config: riscv-kismet-CONFIG_DYNAMIC_FTRACE-CONFIG_RISCV-0-0 (https://download.01.org/0day-ci/archive/20250704/202507041001.7eWJmB1g-lkp@intel.com/config)
reproduce: (https://download.01.org/0day-ci/archive/20250704/202507041001.7eWJmB1g-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507041001.7eWJmB1g-lkp@intel.com/

kismet warnings: (new ones prefixed by >>)
>> kismet: WARNING: unmet direct dependencies detected for DYNAMIC_FTRACE when selected by RISCV
   

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https://github.com/intel/lkp-tests/wiki

Patchew 2.1-devel-b67e4c2

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