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samples/bpf: replace meaningless counter with tracex4

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Currently, compiling samples/bpf with LLVM warns about the unused but
set variable with tracex4_user.

    ./samples/bpf/tracex4_user.c:54:14:
    warning: variable 'i' set but not used [-Wunused-but-set-variable]
        int map_fd, i, j = 0;
                    ^
                    1 warning generated.

This commit resolve this compiler warning by replacing the meaningless
counter.

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20221218061453.6287-3-danieltimlee@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Daniel T. Lee 2022-12-18 15:14:52 +09:00 committed by Martin KaFai Lau
parent 13aa2a9284
commit 71135b77aa
1 changed files with 2 additions and 2 deletions
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4
samples/bpf/tracex4_user.c
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@ -51,7 +51,7 @@ int main(int ac, char **argv)
struct bpf_program *prog;
struct bpf_object *obj;
char filename[256];
int map_fd, i, j = 0;
int map_fd, j = 0;
snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
obj = bpf_object__open_file(filename, NULL);
@ -82,7 +82,7 @@ int main(int ac, char **argv)
j++;
}
for (i = 0; ; i++) {
while (1) {
print_old_objects(map_fd);
sleep(1);
}