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bpf: Change return value of verifier function add_subprog()
Currently, verifier function add_subprog() returns 0 for success and negative value for failure. Change the return value to be the subprog number for success. This functionality will be used in the next patch to save a call to find_subprog(). Signed-off-by: Yonghong Song <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]> Acked-by: Andrii Nakryiko <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
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