Re: [PATCH v5 2/5] alloc_tag: Introduce IOCTLs to toggle allocation tracepoints

[Andrew Morton <akpm@linux-foundation.org>]

On Thu, 5 Nov 2026 23:15:33 +0800 kernel test robot <lkp@intel.com> wrote:

> Hi Abhishek,
> 
> kernel test robot noticed the following build warnings:
> 
> [auto build test WARNING on bcc036cfa1670a64500f6d857eaa71908b79e3fb]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Abhishek-Bapat/alloc_tag-Add-trace-events-for-tracing-allocations/20261104-190336
> base:   bcc036cfa1670a64500f6d857eaa71908b79e3fb
> patch link:    https://lore.kernel.org/r/37ae7dca766994d3872fcc65b623a80d5d506369.1793818636.git.abhishekbapat%40google.com
> patch subject: [PATCH v5 2/5] alloc_tag: Introduce IOCTLs to toggle allocation tracepoints
> config: xtensa-randconfig-1001-20261105 (https://download.01.org/0day-ci/archive/20261105/202611052344.mDV2DB89-lkp@intel.com/config)
> compiler: xtensa-linux-gcc (GCC) 8.5.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261105/202611052344.mDV2DB89-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/202611052344.mDV2DB89-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>, old ones prefixed by <<):
> 
> >> WARNING: modpost: vmlinux: section mismatch in reference: alloc_tag_trace_enabled+0x2c (section: .text.unlikely) -> initcall_level_names (section: .init.data)

Thanks.

#syz test

From: Andrew Morton <akpm@linux-foundation.org>
Subject: alloc_tag: force inline the allocation tracing check
Date: Thu, 05 Nov 2026 17:18:09 -0800

alloc_tag_trace_enabled() is declared inline, but the compiler can
still emit an out-of-line copy. Force it inline,

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202611052344.mDV2DB89-lkp@intel.com/
Cc: Abhishek Bapat <abhishekbapat@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Hao Ge <hao.ge@linux.dev>
---

 include/linux/alloc_tag.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/alloc_tag.h~alloc_tag-introduce-ioctls-to-toggle-allocation-tracepoints-fix
+++ a/include/linux/alloc_tag.h
@@ -161,7 +161,7 @@ static inline bool alloc_tag_is_traced(c
 	return !!(atomic_read(&tag->ct.flags) & CODETAG_FLAG_TRACE_ON);
 }
 
-static inline bool alloc_tag_trace_enabled(const struct alloc_tag *tag)
+static __always_inline bool alloc_tag_trace_enabled(const struct alloc_tag *tag)
 {
 	if (static_branch_unlikely(&alloc_tag_trace_key))
 		return tag && alloc_tag_is_traced(tag);
_