netdev - [PATCH v3 bpf-next 1/7] bpf: add bpf_patch_call_args prototype to include/linux/bpf.h

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Message-ID: <20210112075520.4103414-2-andrii@kernel.org>
Date:   Mon, 11 Jan 2021 23:55:14 -0800
From:   Andrii Nakryiko <andrii@...nel.org>
To:     <bpf@...r.kernel.org>, <netdev@...r.kernel.org>, <ast@...com>,
        <daniel@...earbox.net>
CC:     <andrii@...nel.org>, <kernel-team@...com>,
        Hao Luo <haoluo@...gle.com>, kernel test robot <lkp@...el.com>,
        Yonghong Song <yhs@...com>
Subject: [PATCH v3 bpf-next 1/7] bpf: add bpf_patch_call_args prototype to include/linux/bpf.h

Add bpf_patch_call_args() prototype. This function is called from BPF verifier
and only if CONFIG_BPF_JIT_ALWAYS_ON is not defined. This fixes compiler
warning about missing prototype in some kernel configurations.

Reported-by: kernel test robot <lkp@...el.com>
Fixes: 1ea47e01ad6e ("bpf: add support for bpf_call to interpreter")
Acked-by: Yonghong Song <yhs@...com>
Signed-off-by: Andrii Nakryiko <andrii@...nel.org>
---
 include/linux/bpf.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 07cb5d15e743..ef9309604b3e 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -1403,7 +1403,10 @@ static inline void bpf_long_memcpy(void *dst, const void *src, u32 size)
 /* verify correctness of eBPF program */
 int bpf_check(struct bpf_prog **fp, union bpf_attr *attr,
 	      union bpf_attr __user *uattr);
+
+#ifndef CONFIG_BPF_JIT_ALWAYS_ON
 void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
+#endif
 
 struct btf *bpf_get_btf_vmlinux(void);
 
-- 
2.24.1