lkml.org 
[lkml]   [2019]   [Oct]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] samples/bpf: Fix broken samples.
Date
From: KP Singh <kpsingh@google.com>

Rename asm_goto_workaround.h to asm_workaround.h and add a
workaround for the newly added "asm_inline" in:

commit eb111869301e ("compiler-types.h: add asm_inline definition")

Add missing include for <linux/perf_event.h> which was removed from
perf-sys.h in:

commit 91854f9a077e ("perf tools: Move everything related to
sys_perf_event_open() to perf-sys.h")

Co-developed-by: Florent Revest <revest@google.com>
Signed-off-by: Florent Revest <revest@google.com>
Signed-off-by: KP Singh <kpsingh@google.com>
---
samples/bpf/Makefile | 2 +-
.../{asm_goto_workaround.h => asm_workaround.h} | 17 ++++++++++++++---
samples/bpf/task_fd_query_user.c | 1 +
3 files changed, 16 insertions(+), 4 deletions(-)
rename samples/bpf/{asm_goto_workaround.h => asm_workaround.h} (46%)

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 42b571cde177..ab2b4d7ecb4b 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -289,7 +289,7 @@ $(obj)/%.o: $(src)/%.c
-Wno-gnu-variable-sized-type-not-at-end \
-Wno-address-of-packed-member -Wno-tautological-compare \
-Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
- -I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
+ -I$(srctree)/samples/bpf/ -include asm_workaround.h \
-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
ifeq ($(DWARF2BTF),y)
$(BTF_PAHOLE) -J $@
diff --git a/samples/bpf/asm_goto_workaround.h b/samples/bpf/asm_workaround.h
similarity index 46%
rename from samples/bpf/asm_goto_workaround.h
rename to samples/bpf/asm_workaround.h
index 7409722727ca..7c99ea6ae98c 100644
--- a/samples/bpf/asm_goto_workaround.h
+++ b/samples/bpf/asm_workaround.h
@@ -1,9 +1,10 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2019 Facebook */
-#ifndef __ASM_GOTO_WORKAROUND_H
-#define __ASM_GOTO_WORKAROUND_H
+#ifndef __ASM_WORKAROUND_H
+#define __ASM_WORKAROUND_H

-/* this will bring in asm_volatile_goto macro definition
+/*
+ * This will bring in asm_volatile_goto and asm_inline macro definitions
* if enabled by compiler and config options.
*/
#include <linux/types.h>
@@ -13,5 +14,15 @@
#define asm_volatile_goto(x...) asm volatile("invalid use of asm_volatile_goto")
#endif

+/*
+ * asm_inline is defined as asm __inline in "include/linux/compiler_types.h"
+ * if supported by the kernel's CC (i.e CONFIG_CC_HAS_ASM_INLINE) which is not
+ * supported by CLANG.
+ */
+#ifdef asm_inline
+#undef asm_inline
+#define asm_inline asm
+#endif
+
#define volatile(x...) volatile("")
#endif
diff --git a/samples/bpf/task_fd_query_user.c b/samples/bpf/task_fd_query_user.c
index e39938058223..4c31b305e6ef 100644
--- a/samples/bpf/task_fd_query_user.c
+++ b/samples/bpf/task_fd_query_user.c
@@ -13,6 +13,7 @@
#include <sys/resource.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <linux/perf_event.h>

#include "libbpf.h"
#include "bpf_load.h"
--
2.20.1
\
 
 \ /
  Last update: 2019-10-02 19:47    [W:0.028 / U:67.360 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site