Re: [PATCH 2/3] printk: kunit: support offstack cpumask
From: kernel test robot
Date: Thu Jul 03 2025 - 10:37:28 EST
Hi Petr,
kernel test robot noticed the following build errors:
[auto build test ERROR on linux-next/master]
[cannot apply to linus/master v6.16-rc4]
[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/Petr-Mladek/printk-ringbuffer-Explain-why-the-KUnit-test-ignores-failed-writes/20250702-175422
base: linux-next/master
patch link: https://lore.kernel.org/r/20250702095157.110916-3-pmladek%40suse.com
patch subject: [PATCH 2/3] printk: kunit: support offstack cpumask
config: riscv-randconfig-001-20250703 (https://download.01.org/0day-ci/archive/20250703/202507032226.1sEv2EJM-lkp@xxxxxxxxx/config)
compiler: riscv64-linux-gcc (GCC) 13.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250703/202507032226.1sEv2EJM-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507032226.1sEv2EJM-lkp@xxxxxxxxx/
All errors (new ones prefixed by >>):
In file included from kernel/printk/printk_ringbuffer_kunit_test.c:14:
kernel/printk/printk_ringbuffer_kunit_test.c: In function 'prbtest_cpumask_cleanup':
>> include/kunit/resource.h:409:32: error: cast specifies array type
409 | arg_type arg = (arg_type)in; \
| ^
kernel/printk/printk_ringbuffer_kunit_test.c:219:1: note: in expansion of macro 'KUNIT_DEFINE_ACTION_WRAPPER'
219 | KUNIT_DEFINE_ACTION_WRAPPER(prbtest_cpumask_cleanup, free_cpumask_var, cpumask_var_t);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
--
In file included from printk_ringbuffer_kunit_test.c:14:
printk_ringbuffer_kunit_test.c: In function 'prbtest_cpumask_cleanup':
>> include/kunit/resource.h:409:32: error: cast specifies array type
409 | arg_type arg = (arg_type)in; \
| ^
printk_ringbuffer_kunit_test.c:219:1: note: in expansion of macro 'KUNIT_DEFINE_ACTION_WRAPPER'
219 | KUNIT_DEFINE_ACTION_WRAPPER(prbtest_cpumask_cleanup, free_cpumask_var, cpumask_var_t);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +409 include/kunit/resource.h
b9dce8a1ed3efe David Gow 2023-05-25 392
56778b49c9a2cb David Gow 2023-11-28 393 /**
56778b49c9a2cb David Gow 2023-11-28 394 * KUNIT_DEFINE_ACTION_WRAPPER() - Wrap a function for use as a deferred action.
56778b49c9a2cb David Gow 2023-11-28 395 *
56778b49c9a2cb David Gow 2023-11-28 396 * @wrapper: The name of the new wrapper function define.
56778b49c9a2cb David Gow 2023-11-28 397 * @orig: The original function to wrap.
56778b49c9a2cb David Gow 2023-11-28 398 * @arg_type: The type of the argument accepted by @orig.
56778b49c9a2cb David Gow 2023-11-28 399 *
56778b49c9a2cb David Gow 2023-11-28 400 * Defines a wrapper for a function which accepts a single, pointer-sized
56778b49c9a2cb David Gow 2023-11-28 401 * argument. This wrapper can then be passed to kunit_add_action() and
56778b49c9a2cb David Gow 2023-11-28 402 * similar. This should be used in preference to casting a function
56778b49c9a2cb David Gow 2023-11-28 403 * directly to kunit_action_t, as casting function pointers will break
56778b49c9a2cb David Gow 2023-11-28 404 * control flow integrity (CFI), leading to crashes.
56778b49c9a2cb David Gow 2023-11-28 405 */
56778b49c9a2cb David Gow 2023-11-28 406 #define KUNIT_DEFINE_ACTION_WRAPPER(wrapper, orig, arg_type) \
56778b49c9a2cb David Gow 2023-11-28 407 static void wrapper(void *in) \
56778b49c9a2cb David Gow 2023-11-28 408 { \
56778b49c9a2cb David Gow 2023-11-28 @409 arg_type arg = (arg_type)in; \
56778b49c9a2cb David Gow 2023-11-28 410 orig(arg); \
56778b49c9a2cb David Gow 2023-11-28 411 }
56778b49c9a2cb David Gow 2023-11-28 412
56778b49c9a2cb David Gow 2023-11-28 413
--
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