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Message-ID: <202510181547.dI5kyPuT-lkp@intel.com>
Date: Sat, 18 Oct 2025 16:24:08 +0800
From: kernel test robot <lkp@...el.com>
To: Bill Tsui <b10902118@....edu.tw>, oleg@...hat.com,
catalin.marinas@....com, will@...nel.org
Cc: oe-kbuild-all@...ts.linux.dev, nathan@...nel.org,
nick.desaulniers+lkml@...il.com, morbo@...gle.com,
justinstitt@...gle.com, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
Bill Tsui <b10902118@....edu.tw>
Subject: Re: [PATCH v3 1/1] arm64: ptrace: fix hw_break_set() to set addr and
ctrl together
Hi Bill,
kernel test robot noticed the following build warnings:
[auto build test WARNING on arm64/for-next/core]
[also build test WARNING on linus/master v6.18-rc1 next-20251017]
[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/Bill-Tsui/arm64-ptrace-fix-hw_break_set-to-set-addr-and-ctrl-together/20251016-235711
base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
patch link: https://lore.kernel.org/r/20251016154401.35799-2-b10902118%40ntu.edu.tw
patch subject: [PATCH v3 1/1] arm64: ptrace: fix hw_break_set() to set addr and ctrl together
config: arm64-randconfig-r113-20251018 (https://download.01.org/0day-ci/archive/20251018/202510181547.dI5kyPuT-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251018/202510181547.dI5kyPuT-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510181547.dI5kyPuT-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> arch/arm64/kernel/ptrace.c:449:12: warning: 'ptrace_hbp_set_addr' defined but not used [-Wunused-function]
static int ptrace_hbp_set_addr(unsigned int note_type,
^~~~~~~~~~~~~~~~~~~
>> arch/arm64/kernel/ptrace.c:424:12: warning: 'ptrace_hbp_set_ctrl' defined but not used [-Wunused-function]
static int ptrace_hbp_set_ctrl(unsigned int note_type,
^~~~~~~~~~~~~~~~~~~
vim +/ptrace_hbp_set_addr +449 arch/arm64/kernel/ptrace.c
478fcb2cdb2351 Will Deacon 2012-03-05 423
478fcb2cdb2351 Will Deacon 2012-03-05 @424 static int ptrace_hbp_set_ctrl(unsigned int note_type,
478fcb2cdb2351 Will Deacon 2012-03-05 425 struct task_struct *tsk,
478fcb2cdb2351 Will Deacon 2012-03-05 426 unsigned long idx,
478fcb2cdb2351 Will Deacon 2012-03-05 427 u32 uctrl)
478fcb2cdb2351 Will Deacon 2012-03-05 428 {
478fcb2cdb2351 Will Deacon 2012-03-05 429 int err;
478fcb2cdb2351 Will Deacon 2012-03-05 430 struct perf_event *bp;
478fcb2cdb2351 Will Deacon 2012-03-05 431 struct perf_event_attr attr;
478fcb2cdb2351 Will Deacon 2012-03-05 432 struct arch_hw_breakpoint_ctrl ctrl;
478fcb2cdb2351 Will Deacon 2012-03-05 433
478fcb2cdb2351 Will Deacon 2012-03-05 434 bp = ptrace_hbp_get_initialised_bp(note_type, tsk, idx);
478fcb2cdb2351 Will Deacon 2012-03-05 435 if (IS_ERR(bp)) {
478fcb2cdb2351 Will Deacon 2012-03-05 436 err = PTR_ERR(bp);
478fcb2cdb2351 Will Deacon 2012-03-05 437 return err;
478fcb2cdb2351 Will Deacon 2012-03-05 438 }
478fcb2cdb2351 Will Deacon 2012-03-05 439
478fcb2cdb2351 Will Deacon 2012-03-05 440 attr = bp->attr;
478fcb2cdb2351 Will Deacon 2012-03-05 441 decode_ctrl_reg(uctrl, &ctrl);
478fcb2cdb2351 Will Deacon 2012-03-05 442 err = ptrace_hbp_fill_attr_ctrl(note_type, ctrl, &attr);
478fcb2cdb2351 Will Deacon 2012-03-05 443 if (err)
478fcb2cdb2351 Will Deacon 2012-03-05 444 return err;
478fcb2cdb2351 Will Deacon 2012-03-05 445
478fcb2cdb2351 Will Deacon 2012-03-05 446 return modify_user_hw_breakpoint(bp, &attr);
478fcb2cdb2351 Will Deacon 2012-03-05 447 }
478fcb2cdb2351 Will Deacon 2012-03-05 448
478fcb2cdb2351 Will Deacon 2012-03-05 @449 static int ptrace_hbp_set_addr(unsigned int note_type,
478fcb2cdb2351 Will Deacon 2012-03-05 450 struct task_struct *tsk,
478fcb2cdb2351 Will Deacon 2012-03-05 451 unsigned long idx,
478fcb2cdb2351 Will Deacon 2012-03-05 452 u64 addr)
478fcb2cdb2351 Will Deacon 2012-03-05 453 {
478fcb2cdb2351 Will Deacon 2012-03-05 454 int err;
478fcb2cdb2351 Will Deacon 2012-03-05 455 struct perf_event *bp;
478fcb2cdb2351 Will Deacon 2012-03-05 456 struct perf_event_attr attr;
478fcb2cdb2351 Will Deacon 2012-03-05 457
478fcb2cdb2351 Will Deacon 2012-03-05 458 bp = ptrace_hbp_get_initialised_bp(note_type, tsk, idx);
478fcb2cdb2351 Will Deacon 2012-03-05 459 if (IS_ERR(bp)) {
478fcb2cdb2351 Will Deacon 2012-03-05 460 err = PTR_ERR(bp);
478fcb2cdb2351 Will Deacon 2012-03-05 461 return err;
478fcb2cdb2351 Will Deacon 2012-03-05 462 }
478fcb2cdb2351 Will Deacon 2012-03-05 463
478fcb2cdb2351 Will Deacon 2012-03-05 464 attr = bp->attr;
478fcb2cdb2351 Will Deacon 2012-03-05 465 attr.bp_addr = addr;
478fcb2cdb2351 Will Deacon 2012-03-05 466 err = modify_user_hw_breakpoint(bp, &attr);
478fcb2cdb2351 Will Deacon 2012-03-05 467 return err;
478fcb2cdb2351 Will Deacon 2012-03-05 468 }
478fcb2cdb2351 Will Deacon 2012-03-05 469
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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