linux-kernel - [PATCH 5.4 026/340] bpf: Add bpf_patch_call

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Message-Id: <20210301161049.613831402@linuxfoundation.org>
Date:   Mon,  1 Mar 2021 17:09:30 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, kernel test robot <lkp@...el.com>,
        Andrii Nakryiko <andrii@...nel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Yonghong Song <yhs@...com>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 026/340] bpf: Add bpf_patch_call_args prototype to include/linux/bpf.h

From: Andrii Nakryiko <andrii@...nel.org>

[ Upstream commit a643bff752dcf72a07e1b2ab2f8587e4f51118be ]

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.

Fixes: 1ea47e01ad6e ("bpf: add support for bpf_call to interpreter")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Andrii Nakryiko <andrii@...nel.org>
Signed-off-by: Alexei Starovoitov <ast@...nel.org>
Acked-by: Yonghong Song <yhs@...com>
Link: https://lore.kernel.org/bpf/20210112075520.4103414-2-andrii@kernel.org
Signed-off-by: Sasha Levin <sashal@...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 7aa0d8b5aaf0c..007147f643908 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -711,7 +711,10 @@ 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
 
 /* Map specifics */
 struct xdp_buff;
-- 
2.27.0