This is a note to let you know that I've just added the patch titled
bpf, x86: Fix "no previous prototype" warning
to the 5.15-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-x86-fix-no-previous-prototype-warning.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f45b2974cc0ae959a4c503a071e38a56bd64372f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= <bjorn@xxxxxxxxxx>
Date: Wed, 17 Nov 2021 13:57:08 +0100
Subject: bpf, x86: Fix "no previous prototype" warning
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From: Björn Töpel <bjorn@xxxxxxxxxx>
commit f45b2974cc0ae959a4c503a071e38a56bd64372f upstream.
The arch_prepare_bpf_dispatcher function does not have a prototype, and
yields the following warning when W=1 is enabled for the kernel build.
>> arch/x86/net/bpf_jit_comp.c:2188:5: warning: no previous \
prototype for 'arch_prepare_bpf_dispatcher' [-Wmissing-prototypes]
2188 | int arch_prepare_bpf_dispatcher(void *image, s64 *funcs, \
int num_funcs)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
Remove the warning by adding a function declaration to include/linux/bpf.h.
Fixes: 75ccbef6369e ("bpf: Introduce BPF dispatcher")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Björn Töpel <bjorn@xxxxxxxxxx>
Signed-off-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/bpf/20211117125708.769168-1-bjorn@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/linux/bpf.h | 1 +
1 file changed, 1 insertion(+)
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -723,6 +723,7 @@ int bpf_trampoline_unlink_prog(struct bp
struct bpf_trampoline *bpf_trampoline_get(u64 key,
struct bpf_attach_target_info *tgt_info);
void bpf_trampoline_put(struct bpf_trampoline *tr);
+int arch_prepare_bpf_dispatcher(void *image, s64 *funcs, int num_funcs);
#define BPF_DISPATCHER_INIT(_name) { \
.mutex = __MUTEX_INITIALIZER(_name.mutex), \
.func = &_name##_func, \
Patches currently in stable-queue which might be from bjorn@xxxxxxxxxx are
queue-5.15/bpf-x86-fix-no-previous-prototype-warning.patch
