This is a note to let you know that I've just added the patch titled
bpf: Avoid warning when re-casting __bpf_call_base into __bpf_call_base_args
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bpf-avoid-warning-when-re-casting-__bpf_call_base-in.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d3f7149f3e33224dec428be0c69c7a10dfd81f89
Author: Andrii Nakryiko <andrii@xxxxxxxxxx>
Date: Mon Jan 11 23:55:15 2021 -0800
bpf: Avoid warning when re-casting __bpf_call_base into __bpf_call_base_args
[ Upstream commit 6943c2b05bf09fd5c5729f7d7d803bf3f126cb9a ]
BPF interpreter uses extra input argument, so re-casts __bpf_call_base into
__bpf_call_base_args. Avoid compiler warning about incompatible function
prototypes by casting to void * first.
Fixes: 1ea47e01ad6e ("bpf: add support for bpf_call to interpreter")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
Acked-by: Yonghong Song <yhs@xxxxxx>
Link: https://lore.kernel.org/bpf/20210112075520.4103414-3-andrii@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/linux/filter.h b/include/linux/filter.h
index 79830bc9e45cf..c53e2fe3c8f7f 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -846,7 +846,7 @@ void sk_filter_uncharge(struct sock *sk, struct sk_filter *fp);
u64 __bpf_call_base(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5);
#define __bpf_call_base_args \
((u64 (*)(u64, u64, u64, u64, u64, const struct bpf_insn *)) \
- __bpf_call_base)
+ (void *)__bpf_call_base)
struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog);
void bpf_jit_compile(struct bpf_prog *prog);
