mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-02 08:34:20 +08:00
636e78b1cd
clang started to error on invalid asm clobber usage in x86 headers
and many bpf program samples failed to build with the message:
CLANG-bpf /data/users/ast/bpf-next/samples/bpf/xdp_redirect_kern.o
In file included from /data/users/ast/bpf-next/samples/bpf/xdp_redirect_kern.c:14:
In file included from ../include/linux/in.h:23:
In file included from ../include/uapi/linux/in.h:24:
In file included from ../include/linux/socket.h:8:
In file included from ../include/linux/uio.h:14:
In file included from ../include/crypto/hash.h:16:
In file included from ../include/linux/crypto.h:26:
In file included from ../include/linux/uaccess.h:5:
In file included from ../include/linux/sched.h:15:
In file included from ../include/linux/sem.h:5:
In file included from ../include/uapi/linux/sem.h:5:
In file included from ../include/linux/ipc.h:9:
In file included from ../include/linux/refcount.h:72:
../arch/x86/include/asm/refcount.h:72:36: error: asm-specifier for input or output variable conflicts with asm clobber list
r->refs.counter, e, "er", i, "cx");
^
../arch/x86/include/asm/refcount.h:86:27: error: asm-specifier for input or output variable conflicts with asm clobber list
r->refs.counter, e, "cx");
^
2 errors generated.
Override volatile() to workaround the problem.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
18 lines
453 B
C
18 lines
453 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/* Copyright (c) 2019 Facebook */
|
|
#ifndef __ASM_GOTO_WORKAROUND_H
|
|
#define __ASM_GOTO_WORKAROUND_H
|
|
|
|
/* this will bring in asm_volatile_goto macro definition
|
|
* if enabled by compiler and config options.
|
|
*/
|
|
#include <linux/types.h>
|
|
|
|
#ifdef asm_volatile_goto
|
|
#undef asm_volatile_goto
|
|
#define asm_volatile_goto(x...) asm volatile("invalid use of asm_volatile_goto")
|
|
#endif
|
|
|
|
#define volatile(x...) volatile("")
|
|
#endif
|