Commit 0cecd492 authored by Ihor Solodrai's avatar Ihor Solodrai Committed by Alexei Starovoitov
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libbpf: Remove extern declaration of bpf_stream_vprintk() 



An issue was reported that building BPF program which includes both
vmlinux.h and bpf_helpers.h from libbpf fails due to conflicting
declarations of bpf_stream_vprintk().

Remove the extern declaration from bpf_helpers.h to address this.

In order to use bpf_stream_printk() macro, BPF programs are expected
to either include vmlinux.h of the kernel they are targeting, or add
their own extern declaration.

Reported-by: default avatarLuca Boccassi <luca.boccassi@gmail.com>
Closes: https://github.com/libbpf/libbpf/issues/947


Signed-off-by: default avatarIhor Solodrai <ihor.solodrai@linux.dev>
Link: https://lore.kernel.org/r/20260218215651.2057673-3-ihor.solodrai@linux.dev


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent b3dfa128

tools/lib/bpf/bpf_helpers.h

+0 −3
Original line number Diff line number Diff line
@@ -315,9 +315,6 @@ enum libbpf_tristate { 
			  ___param, sizeof(___param));		\

})



extern int bpf_stream_vprintk(int stream_id, const char *fmt__str, const void *args,

			      __u32 len__sz) __weak __ksym;



#define bpf_stream_printk(stream_id, fmt, args...)					\

({											\

	static const char ___fmt[] = fmt;						\