linux/tools/testing/selftests/bpf/progs/test_global_func11.c
Dmitrii Banshchikov c41d81bfbb selftests/bpf: Fix a compiler warning in global func test
Add an explicit 'const void *' cast to pass program ctx pointer type into
a global function that expects pointer to structure.

warning: incompatible pointer types
passing 'struct __sk_buff *' to parameter of type 'const struct S *'
[-Wincompatible-pointer-types]
        return foo(skb);
                   ^~~
progs/test_global_func11.c:10:36: note: passing argument to parameter 's' here
__noinline int foo(const struct S *s)
                                   ^

Fixes: 8b08807d03 ("selftests/bpf: Add unit tests for pointers in global functions")
Signed-off-by: Dmitrii Banshchikov <me@ubique.spb.ru>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210223082211.302596-1-me@ubique.spb.ru
2021-02-24 16:48:16 +01:00

20 lines
324 B
C

// SPDX-License-Identifier: GPL-2.0-only
#include <stddef.h>
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
struct S {
int x;
};
__noinline int foo(const struct S *s)
{
return s ? bpf_get_prandom_u32() < s->x : 0;
}
SEC("cgroup_skb/ingress")
int test_cls(struct __sk_buff *skb)
{
return foo((const void *)skb);
}