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selftests/bpf: Fix test_ksyms on non-SMP kernels

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On non-SMP kernels __per_cpu_start is not 0, so look it up in kallsyms.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200910171336.3161995-1-iii@linux.ibm.com
This commit is contained in:
Ilya Leoshkevich 2020-09-10 19:13:36 +02:00 committed by Alexei Starovoitov
parent d66423fbe1
commit 90a1deda75
1 changed files with 4 additions and 2 deletions
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6
tools/testing/selftests/bpf/prog_tests/ksyms.c
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@ -32,6 +32,7 @@ out:
void test_ksyms(void)
{
__u64 per_cpu_start_addr = kallsyms_find("__per_cpu_start");
__u64 link_fops_addr = kallsyms_find("bpf_link_fops");
const char *btf_path = "/sys/kernel/btf/vmlinux";
struct test_ksyms *skel;
@ -63,8 +64,9 @@ void test_ksyms(void)
"got %llu, exp %llu\n", data->out__bpf_link_fops1, (__u64)0);
CHECK(data->out__btf_size != btf_size, "btf_size",
"got %llu, exp %llu\n", data->out__btf_size, btf_size);
CHECK(data->out__per_cpu_start != 0, "__per_cpu_start",
"got %llu, exp %llu\n", data->out__per_cpu_start, (__u64)0);
CHECK(data->out__per_cpu_start != per_cpu_start_addr, "__per_cpu_start",
"got %llu, exp %llu\n", data->out__per_cpu_start,
per_cpu_start_addr);
cleanup:
test_ksyms__destroy(skel);