Re: [PATCH] trace_branch: use per-cpu counters for correct/incorrect stats
kernel test robot <[email protected]> Fri, 7 Aug 2026 03:38:25 +0800
| Newsgroups | dev.linux.lists.oe-kbuild-all,org.kernel.vger.linux-kernel,org.kernel.vger.linux-trace-kernel |
|---|---|
| Message-ID | <[email protected]> |
Hi Martin, kernel test robot noticed the following build warnings: [auto build test WARNING on trace/for-next] [also build test WARNING on linus/master v7.2-rc6 next-20260806] [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/Martin-Weiss/trace_branch-use-per-cpu-counters-for-correct-incorrect-stats/20260806-093445 base: https://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace for-next patch link: https://lore.kernel.org/r/20260629095838.601926-1-Martin.weiss2410%40gmail.com patch subject: [PATCH] trace_branch: use per-cpu counters for correct/incorrect stats config: um-randconfig-r123-20260806 (https://download.01.org/0day-ci/archive/20260807/[email protected]/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 sparse: v0.6.5-rc1 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260807/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ sparse warnings: (new ones prefixed by >>) >> kernel/trace/trace_branch.c:218:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got unsigned long * @@ kernel/trace/trace_branch.c:218:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/trace/trace_branch.c:218:17: sparse: got unsigned long * >> kernel/trace/trace_branch.c:218:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got unsigned long * @@ kernel/trace/trace_branch.c:218:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/trace/trace_branch.c:218:17: sparse: got unsigned long * >> kernel/trace/trace_branch.c:218:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got unsigned long * @@ kernel/trace/trace_branch.c:218:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/trace/trace_branch.c:218:17: sparse: got unsigned long * >> kernel/trace/trace_branch.c:218:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got unsigned long * @@ kernel/trace/trace_branch.c:218:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/trace/trace_branch.c:218:17: sparse: got unsigned long * >> kernel/trace/trace_branch.c:218:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got unsigned long * @@ kernel/trace/trace_branch.c:218:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/trace/trace_branch.c:218:17: sparse: got unsigned long * kernel/trace/trace_branch.c:220:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got unsigned long * @@ kernel/trace/trace_branch.c:220:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/trace/trace_branch.c:220:17: sparse: got unsigned long * kernel/trace/trace_branch.c:220:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got unsigned long * @@ kernel/trace/trace_branch.c:220:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/trace/trace_branch.c:220:17: sparse: got unsigned long * kernel/trace/trace_branch.c:220:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got unsigned long * @@ kernel/trace/trace_branch.c:220:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/trace/trace_branch.c:220:17: sparse: got unsigned long * kernel/trace/trace_branch.c:220:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got unsigned long * @@ kernel/trace/trace_branch.c:220:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/trace/trace_branch.c:220:17: sparse: got unsigned long * kernel/trace/trace_branch.c:220:17: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got unsigned long * @@ kernel/trace/trace_branch.c:220:17: sparse: expected void const [noderef] __percpu *__vpp_verify kernel/trace/trace_branch.c:220:17: sparse: got unsigned long * vim +218 kernel/trace/trace_branch.c 197 198 void ftrace_likely_update(struct ftrace_likely_data *f, int val, 199 int expect, int is_constant) 200 { 201 unsigned long flags = user_access_save(); 202 203 /* A constant is always correct */ 204 if (is_constant) { 205 f->constant++; 206 val = expect; 207 } 208 /* 209 * I would love to have a trace point here instead, but the 210 * trace point code is so inundated with unlikely and likely 211 * conditions that the recursive nightmare that exists is too 212 * much to try to get working. At least for now. 213 */ 214 trace_likely_condition(f, val, expect); 215 216 /* use per-cpu counters to avoid contention */ 217 if (val == expect) > 218 this_cpu_inc(f->data.correct); 219 else 220 this_cpu_inc(f->data.incorrect); 221 222 user_access_restore(flags); 223 } 224 EXPORT_SYMBOL(ftrace_likely_update); 225 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki