mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-18 04:19:24 +07:00
f6161a8f30
Kernel test robot (lkp@intel.com) reports a compilation error at https://www.spinics.net/lists/netdev/msg534913.html introduced by commit838e96904f("bpf: Introduce bpf_func_info"). If CONFIG_BPF is defined and CONFIG_BPF_SYSCALL is not defined, the following error will appear: kernel/bpf/core.c:414: undefined reference to `btf_type_by_id' kernel/bpf/core.c:415: undefined reference to `btf_name_by_offset' When CONFIG_BPF_SYSCALL is not defined, let us define stub inline functions for btf_type_by_id() and btf_name_by_offset() in include/linux/btf.h. This way, the compilation failure can be avoided. Fixes:838e96904f("bpf: Introduce bpf_func_info") Reported-by: kbuild test robot <lkp@intel.com> Cc: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/* Copyright (c) 2018 Facebook */
|
|
|
|
#ifndef _LINUX_BTF_H
|
|
#define _LINUX_BTF_H 1
|
|
|
|
#include <linux/types.h>
|
|
|
|
struct btf;
|
|
struct btf_type;
|
|
union bpf_attr;
|
|
|
|
extern const struct file_operations btf_fops;
|
|
|
|
void btf_put(struct btf *btf);
|
|
int btf_new_fd(const union bpf_attr *attr);
|
|
struct btf *btf_get_by_fd(int fd);
|
|
int btf_get_info_by_fd(const struct btf *btf,
|
|
const union bpf_attr *attr,
|
|
union bpf_attr __user *uattr);
|
|
/* Figure out the size of a type_id. If type_id is a modifier
|
|
* (e.g. const), it will be resolved to find out the type with size.
|
|
*
|
|
* For example:
|
|
* In describing "const void *", type_id is "const" and "const"
|
|
* refers to "void *". The return type will be "void *".
|
|
*
|
|
* If type_id is a simple "int", then return type will be "int".
|
|
*
|
|
* @btf: struct btf object
|
|
* @type_id: Find out the size of type_id. The type_id of the return
|
|
* type is set to *type_id.
|
|
* @ret_size: It can be NULL. If not NULL, the size of the return
|
|
* type is set to *ret_size.
|
|
* Return: The btf_type (resolved to another type with size info if needed).
|
|
* NULL is returned if type_id itself does not have size info
|
|
* (e.g. void) or it cannot be resolved to another type that
|
|
* has size info.
|
|
* *type_id and *ret_size will not be changed in the
|
|
* NULL return case.
|
|
*/
|
|
const struct btf_type *btf_type_id_size(const struct btf *btf,
|
|
u32 *type_id,
|
|
u32 *ret_size);
|
|
void btf_type_seq_show(const struct btf *btf, u32 type_id, void *obj,
|
|
struct seq_file *m);
|
|
int btf_get_fd_by_id(u32 id);
|
|
u32 btf_id(const struct btf *btf);
|
|
|
|
#ifdef CONFIG_BPF_SYSCALL
|
|
const struct btf_type *btf_type_by_id(const struct btf *btf, u32 type_id);
|
|
const char *btf_name_by_offset(const struct btf *btf, u32 offset);
|
|
#else
|
|
static inline const struct btf_type *btf_type_by_id(const struct btf *btf,
|
|
u32 type_id)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline const char *btf_name_by_offset(const struct btf *btf,
|
|
u32 offset)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
#endif
|