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| author | Alexei Starovoitov <ast@kernel.org> | 2019-04-04 14:37:14 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-04-05 16:28:36 +0200 |
| commit | 636e78b1cdb40b77a79b143dbd9d94847b360efa (patch) | |
| tree | 8b8c0d6b2b6bc641875640544e3c2c787215e856 | |
| parent | e67b2c715415b121339049b630f0b4e1ede888dc (diff) | |
| download | linux-636e78b1cdb40b77a79b143dbd9d94847b360efa.tar.bz2 | |
samples/bpf: fix build with new clang
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>
| -rw-r--r-- | samples/bpf/asm_goto_workaround.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/samples/bpf/asm_goto_workaround.h b/samples/bpf/asm_goto_workaround.h index 5cd7c1d1a5d5..7409722727ca 100644 --- a/samples/bpf/asm_goto_workaround.h +++ b/samples/bpf/asm_goto_workaround.h @@ -13,4 +13,5 @@ #define asm_volatile_goto(x...) asm volatile("invalid use of asm_volatile_goto") #endif +#define volatile(x...) volatile("") #endif |