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Date: Thu, 9 Apr 2009 04:36:38 GMT
From: Frederic Weisbecker <fweisbec@...il.com>
To: linux-tip-commits@...r.kernel.org
Cc: mathieu.desnoyers@...ymtl.ca, mingo@...hat.com,
a.p.zijlstra@...llo.nl, tony.luck@...el.com, fweisbec@...il.com,
rostedt@...dmis.org, md@...gle.com, tglx@...utronix.de,
jbaron@...hat.com, laijs@...fujitsu.com, hpa@...or.com,
fche@...hat.com, jiayingz@...gle.com, linux-kernel@...r.kernel.org,
mrubin@...gle.com, kosaki.motohiro@...fujitsu.com, mingo@...e.hu,
mbligh@...gle.com
Subject: [tip:tracing/urgent] tracing/syscalls: use a dedicated file header
Commit-ID: 47788c58e66c050982241d9a05eb690daceb05a9
Gitweb: http://git.kernel.org/tip/47788c58e66c050982241d9a05eb690daceb05a9
Author: Frederic Weisbecker <fweisbec@...il.com>
AuthorDate: Wed, 8 Apr 2009 20:40:59 +0200
Committer: Ingo Molnar <mingo@...e.hu>
CommitDate: Thu, 9 Apr 2009 05:43:32 +0200
tracing/syscalls: use a dedicated file header
Impact: fix build warnings and possibe compat misbehavior on IA64
Building a kernel on ia64 might trigger these ugly build warnings:
CC arch/ia64/ia32/sys_ia32.o
In file included from arch/ia64/ia32/sys_ia32.c:55:
arch/ia64/ia32/ia32priv.h:290:1: warning: "elf_check_arch" redefined
In file included from include/linux/elf.h:7,
from include/linux/module.h:14,
from include/linux/ftrace.h:8,
from include/linux/syscalls.h:68,
from arch/ia64/ia32/sys_ia32.c:18:
arch/ia64/include/asm/elf.h:19:1: warning: this is the location of the previous definition
[...]
sys_ia32.c includes linux/syscalls.h which in turn includes linux/ftrace.h
to import the syscalls tracing prototypes.
But including ftrace.h can pull too much things for a low level file,
especially on ia64 where the ia32 private headers conflict with higher
level headers.
Now we isolate the syscall tracing headers in their own lightweight file.
Reported-by: Tony Luck <tony.luck@...el.com>
Tested-by: Tony Luck <tony.luck@...el.com>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Acked-by: Tony Luck <tony.luck@...el.com>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Jason Baron <jbaron@...hat.com>
Cc: "Frank Ch. Eigler" <fche@...hat.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc: Lai Jiangshan <laijs@...fujitsu.com>
Cc: Jiaying Zhang <jiayingz@...gle.com>
Cc: Michael Rubin <mrubin@...gle.com>
Cc: Martin Bligh <mbligh@...gle.com>
Cc: Michael Davidson <md@...gle.com>
LKML-Reference: <20090408184058.GB6017@...here>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
arch/x86/kernel/ftrace.c | 2 ++
arch/x86/kernel/ptrace.c | 3 ++-
include/linux/ftrace.h | 29 -----------------------------
include/linux/syscalls.h | 2 +-
include/trace/syscall.h | 35 +++++++++++++++++++++++++++++++++++
kernel/trace/trace_syscalls.c | 2 +-
6 files changed, 41 insertions(+), 32 deletions(-)
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 70a10ca..18dfa30 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -18,6 +18,8 @@
#include <linux/init.h>
#include <linux/list.h>
+#include <trace/syscall.h>
+
#include <asm/cacheflush.h>
#include <asm/ftrace.h>
#include <asm/nops.h>
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index fe9345c..23b7c8f 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -21,7 +21,6 @@
#include <linux/audit.h>
#include <linux/seccomp.h>
#include <linux/signal.h>
-#include <linux/ftrace.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
@@ -35,6 +34,8 @@
#include <asm/proto.h>
#include <asm/ds.h>
+#include <trace/syscall.h>
+
#include "tls.h"
enum x86_regset {
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index ff112a8..8a0c2f2 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -511,33 +511,4 @@ static inline void trace_hw_branch_oops(void) {}
#endif /* CONFIG_HW_BRANCH_TRACER */
-/*
- * A syscall entry in the ftrace syscalls array.
- *
- * @name: name of the syscall
- * @nb_args: number of parameters it takes
- * @types: list of types as strings
- * @args: list of args as strings (args[i] matches types[i])
- */
-struct syscall_metadata {
- const char *name;
- int nb_args;
- const char **types;
- const char **args;
-};
-
-#ifdef CONFIG_FTRACE_SYSCALLS
-extern void arch_init_ftrace_syscalls(void);
-extern struct syscall_metadata *syscall_nr_to_meta(int nr);
-extern void start_ftrace_syscalls(void);
-extern void stop_ftrace_syscalls(void);
-extern void ftrace_syscall_enter(struct pt_regs *regs);
-extern void ftrace_syscall_exit(struct pt_regs *regs);
-#else
-static inline void start_ftrace_syscalls(void) { }
-static inline void stop_ftrace_syscalls(void) { }
-static inline void ftrace_syscall_enter(struct pt_regs *regs) { }
-static inline void ftrace_syscall_exit(struct pt_regs *regs) { }
-#endif
-
#endif /* _LINUX_FTRACE_H */
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 6470f74..dabe4ad 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -65,7 +65,7 @@ struct old_linux_dirent;
#include <asm/signal.h>
#include <linux/quota.h>
#include <linux/key.h>
-#include <linux/ftrace.h>
+#include <trace/syscall.h>
#define __SC_DECL1(t1, a1) t1 a1
#define __SC_DECL2(t2, a2, ...) t2 a2, __SC_DECL1(__VA_ARGS__)
diff --git a/include/trace/syscall.h b/include/trace/syscall.h
new file mode 100644
index 0000000..8cfe515
--- /dev/null
+++ b/include/trace/syscall.h
@@ -0,0 +1,35 @@
+#ifndef _TRACE_SYSCALL_H
+#define _TRACE_SYSCALL_H
+
+#include <asm/ptrace.h>
+
+/*
+ * A syscall entry in the ftrace syscalls array.
+ *
+ * @name: name of the syscall
+ * @nb_args: number of parameters it takes
+ * @types: list of types as strings
+ * @args: list of args as strings (args[i] matches types[i])
+ */
+struct syscall_metadata {
+ const char *name;
+ int nb_args;
+ const char **types;
+ const char **args;
+};
+
+#ifdef CONFIG_FTRACE_SYSCALLS
+extern void arch_init_ftrace_syscalls(void);
+extern struct syscall_metadata *syscall_nr_to_meta(int nr);
+extern void start_ftrace_syscalls(void);
+extern void stop_ftrace_syscalls(void);
+extern void ftrace_syscall_enter(struct pt_regs *regs);
+extern void ftrace_syscall_exit(struct pt_regs *regs);
+#else
+static inline void start_ftrace_syscalls(void) { }
+static inline void stop_ftrace_syscalls(void) { }
+static inline void ftrace_syscall_enter(struct pt_regs *regs) { }
+static inline void ftrace_syscall_exit(struct pt_regs *regs) { }
+#endif
+
+#endif /* _TRACE_SYSCALL_H */
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index a2a3af2..5e57964 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -1,5 +1,5 @@
+#include <trace/syscall.h>
#include <linux/kernel.h>
-#include <linux/ftrace.h>
#include <asm/syscall.h>
#include "trace_output.h"
--
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