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a431d67934
Assigning "attr" to "attr" does not have any effect, but was caught by
Coverity, so let's remove this.
Reported-by: coverity (CID 1354720)
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Fixes: 1b76c13e4b ("bpf tools: Introduce 'bpf' library and add bpf feature check")
Link: http://lkml.kernel.org/r/1461551694-5512-2-git-send-email-f.fainelli@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
36 lines
736 B
C
36 lines
736 B
C
#include <asm/unistd.h>
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#include <linux/bpf.h>
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#include <unistd.h>
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#ifndef __NR_bpf
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# if defined(__i386__)
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# define __NR_bpf 357
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# elif defined(__x86_64__)
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# define __NR_bpf 321
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# elif defined(__aarch64__)
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# define __NR_bpf 280
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# error __NR_bpf not defined. libbpf does not support your arch.
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# endif
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#endif
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int main(void)
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{
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union bpf_attr attr;
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/* Check fields in attr */
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attr.prog_type = BPF_PROG_TYPE_KPROBE;
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attr.insn_cnt = 0;
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attr.insns = 0;
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attr.license = 0;
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attr.log_buf = 0;
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attr.log_size = 0;
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attr.log_level = 0;
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attr.kern_version = 0;
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/*
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* Test existence of __NR_bpf and BPF_PROG_LOAD.
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* This call should fail if we run the testcase.
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*/
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return syscall(__NR_bpf, BPF_PROG_LOAD, attr, sizeof(attr));
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}
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