[patch 08/12] ia64: tools: remove duplicate definition of ia64_mf() on ia64

Andrew Morton
2021-04-16T22:46:17Z

From: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Subject: ia64: tools: remove duplicate definition of ia64_mf() on ia64

The ia64_mf() macro defined in tools/arch/ia64/include/asm/barrier.h is
already defined in <asm/gcc_intrin.h> on ia64 which causes libbpf failing
to build:

CC /usr/src/linux/tools/bpf/bpftool//libbpf/staticobjs/libbpf.o
In file included from /usr/src/linux/tools/include/asm/barrier.h:24,
from /usr/src/linux/tools/include/linux/ring_buffer.h:4,
from libbpf.c:37:
/usr/src/linux/tools/include/asm/../../arch/ia64/include/asm/barrier.h:43: error: "ia64_mf" redefined [-Werror]
43 | #define ia64_mf() asm volatile ("mf" ::: "memory")
|
In file included from /usr/include/ia64-linux-gnu/asm/intrinsics.h:20,
from /usr/include/ia64-linux-gnu/asm/swab.h:11,
from /usr/include/linux/swab.h:8,
from /usr/include/linux/byteorder/little_endian.h:13,
from /usr/include/ia64-linux-gnu/asm/byteorder.h:5,
from /usr/src/linux/tools/include/uapi/linux/perf_event.h:20,
from libbpf.c:36:
/usr/include/ia64-linux-gnu/asm/gcc_intrin.h:382: note: this is the location of the previous definition
382 | #define ia64_mf() __asm__ volatile ("mf" ::: "memory")
|
cc1: all warnings being treated as errors

Thus, remove the definition from tools/arch/ia64/include/asm/barrier.h.

Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

tools/arch/ia64/include/asm/barrier.h | 3 ---
1 file changed, 3 deletions(-)

--- a/tools/arch/ia64/include/asm/barrier.h~ia64-tools-remove-duplicate-definition-of-ia64_mf-on-ia64
+++ a/tools/arch/ia64/include/asm/barrier.h
@@ -39,9 +39,6 @@
* sequential memory pages only.
*/

-/* XXX From arch/ia64/include/uapi/asm/gcc_intrin.h */
-#define ia64_mf() asm volatile ("mf" ::: "memory")
-
#define mb() ia64_mf()
#define rmb() mb()
#define wmb() mb()
_