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Message-ID: <202212060935.IN33868O-lkp@intel.com>
Date: Tue, 6 Dec 2022 09:57:04 +0800
From: kernel test robot <lkp@...el.com>
To: Song Liu <songliubraving@...com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Alexei Starovoitov <ast@...nel.org>
Subject: tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c:16:14:
warning: no previous prototype for 'bpf_testmod_loop_test'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: bce9332220bd677d83b19d21502776ad555a0e73
commit: 025bd7c753aab18cd594924a46ab46ac47209df9 selftests/bpf: Add test for bpf_get_branch_snapshot
date: 1 year, 3 months ago
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce:
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=025bd7c753aab18cd594924a46ab46ac47209df9
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 025bd7c753aab18cd594924a46ab46ac47209df9
make O=/tmp/kselftest headers
make O=/tmp/kselftest -C tools/testing/selftests
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
>> tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c:16:14: warning: no previous prototype for 'bpf_testmod_loop_test' [-Wmissing-prototypes]
16 | noinline int bpf_testmod_loop_test(int n)
| ^~~~~~~~~~~~~~~~~~~~~
tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c:29:1: warning: no previous prototype for 'bpf_testmod_test_read' [-Wmissing-prototypes]
29 | bpf_testmod_test_read(struct file *file, struct kobject *kobj,
| ^~~~~~~~~~~~~~~~~~~~~
tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c:51:1: warning: no previous prototype for 'bpf_testmod_test_write' [-Wmissing-prototypes]
51 | bpf_testmod_test_write(struct file *file, struct kobject *kobj,
| ^~~~~~~~~~~~~~~~~~~~~~
vim +/bpf_testmod_loop_test +16 tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c
15
> 16 noinline int bpf_testmod_loop_test(int n)
17 {
18 int i, sum = 0;
19
20 /* the primary goal of this test is to test LBR. Create a lot of
21 * branches in the function, so we can catch it easily.
22 */
23 for (i = 0; i < n; i++)
24 sum += i;
25 return sum;
26 }
27
--
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https://01.org/lkp
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