bpf: btf: fix inconsistent IS_ERR and PTR_ERR
Fix inconsistent IS_ERR and PTR_ERR in get_btf, the proper pointer to be passed as argument is '*btf' This issue was detected with the help of Coccinelle. Fixes: 2d3feca8 ("bpf: btf: print map dump and lookup with btf info") Signed-off-by: NYueHaibing <yuehaibing@huawei.com> Acked-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NJakub Kicinski <jakub.kicinski@netronome.com> Acked-by: NMartin KaFai Lau <kafai@fb.com> Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
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