[akpm-mm:mm-new 242/252] radix-tree.c:459:17: error: implicit declaration of function 'kmemleak_transient_leak'

[akpm-mm:mm-new 242/252] radix-tree.c:459:17: error: implicit declaration of function 'kmemleak_transient_leak'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new
head:   e031e55776cf9193b4720a253e92539ca536d224
commit: 58b5601b28c144be1905eef7964bfa8457f58292 [242/252] radix-tree: fix kmemleak false positives on tree head reassignment
config: powerpc64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20260703/202607031019.AffpLUyg-lkp@intel.com/config)
compiler: powerpc64-linux-gnu-gcc (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260703/202607031019.AffpLUyg-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/202607031019.AffpLUyg-lkp@intel.com/

All errors (new ones prefixed by >>):

   radix-tree.c: In function 'radix_tree_extend':
>> radix-tree.c:459:17: error: implicit declaration of function 'kmemleak_transient_leak' [-Wimplicit-function-declaration]
     459 |                 kmemleak_transient_leak(node);
         |                 ^~~~~~~~~~~~~~~~~~~~~~~

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [akpm-mm:mm-new 242/252] radix-tree.c:459:17: error: implicit declaration of function 'kmemleak_transient_leak'

[Breno Leitao]

On Fri, Jul 03, 2026 at 10:30:59AM +0200, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new
> head:   e031e55776cf9193b4720a253e92539ca536d224
> commit: 58b5601b28c144be1905eef7964bfa8457f58292 [242/252] radix-tree: fix kmemleak false positives on tree head reassignment
> config: powerpc64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20260703/202607031019.AffpLUyg-lkp@intel.com/config)
> compiler: powerpc64-linux-gnu-gcc (Debian 14.2.0-19) 14.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260703/202607031019.AffpLUyg-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/202607031019.AffpLUyg-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>    radix-tree.c: In function 'radix_tree_extend':
> >> radix-tree.c:459:17: error: implicit declaration of function 'kmemleak_transient_leak' [-Wimplicit-function-declaration]
>      459 |                 kmemleak_transient_leak(node);
>          |                 ^~~~~~~~~~~~~~~~~~~~~~~

Ack. This seems to be used by userspace tool that compile radix-tree in 
userspace, and it doesn't understand kmemleak_transient_leak().

V2 should have a fix for this:

https://lore.kernel.org/all/20260703-radix-tree-v2-1-38bb6efb5f6e@debian.org/