From: David Miller <davem@xxxxxxxxxxxxx>
Date: Mon, 17 Jan 2011 22:00:39 -0800 (PST)
> ftrace: Remove unnecessary alignment tag from ftrace_event_call.
>
> It's completely unnecessary and causes problems on platforms
> where this tag down-aligns the structure's alignment.
>
> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
...
Ok, unless we can explain why these alignments are needed at all, we
should kill all of them:
--------------------
tracing: Remove unnecessary __aligned__(4) tag from trace data.
It's completely unnecessary and causes problems on platforms
where this tag down-aligns the structure's alignment.
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 320d6c9..8620723 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -94,7 +94,6 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
#define __branch_check__(x, expect) ({ \
int ______r; \
static struct ftrace_branch_data \
- __attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_annotated_branch"))) \
______f = { \
.func = __func__, \
@@ -129,7 +128,6 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
({ \
int ______r; \
static struct ftrace_branch_data \
- __attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_branch"))) \
______f = { \
.func = __func__, \
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 18cd068..e23a188 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -125,10 +125,8 @@ extern struct trace_event_functions enter_syscall_print_funcs;
extern struct trace_event_functions exit_syscall_print_funcs;
#define SYSCALL_TRACE_ENTER_EVENT(sname) \
- static struct syscall_metadata \
- __attribute__((__aligned__(4))) __syscall_meta_##sname; \
+ static struct syscall_metadata __syscall_meta_##sname; \
static struct ftrace_event_call __used \
- __attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_events"))) \
event_enter_##sname = { \
.name = "sys_enter"#sname, \
@@ -139,10 +137,8 @@ extern struct trace_event_functions exit_syscall_print_funcs;
__TRACE_EVENT_FLAGS(enter_##sname, TRACE_EVENT_FL_CAP_ANY)
#define SYSCALL_TRACE_EXIT_EVENT(sname) \
- static struct syscall_metadata \
- __attribute__((__aligned__(4))) __syscall_meta_##sname; \
+ static struct syscall_metadata __syscall_meta_##sname; \
static struct ftrace_event_call __used \
- __attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_events"))) \
event_exit_##sname = { \
.name = "sys_exit"#sname, \
@@ -156,7 +152,6 @@ extern struct trace_event_functions exit_syscall_print_funcs;
SYSCALL_TRACE_ENTER_EVENT(sname); \
SYSCALL_TRACE_EXIT_EVENT(sname); \
static struct syscall_metadata __used \
- __attribute__((__aligned__(4))) \
__attribute__((section("__syscalls_metadata"))) \
__syscall_meta_##sname = { \
.name = "sys"#sname, \
@@ -172,7 +167,6 @@ extern struct trace_event_functions exit_syscall_print_funcs;
SYSCALL_TRACE_ENTER_EVENT(_##sname); \
SYSCALL_TRACE_EXIT_EVENT(_##sname); \
static struct syscall_metadata __used \
- __attribute__((__aligned__(4))) \
__attribute__((section("__syscalls_metadata"))) \
__syscall_meta__##sname = { \
.name = "sys_"#sname, \
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index e16610c..bd86d1b 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -68,8 +68,7 @@
#undef DEFINE_EVENT
#define DEFINE_EVENT(template, name, proto, args) \
- static struct ftrace_event_call __used \
- __attribute__((__aligned__(4))) event_##name
+ static struct ftrace_event_call __used event_##name
#undef DEFINE_EVENT_PRINT
#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
@@ -447,7 +446,6 @@ static inline notrace int ftrace_get_offsets_##call( \
* };
*
* static struct ftrace_event_call __used
- * __attribute__((__aligned__(4)))
* __attribute__((section("_ftrace_events"))) event_<call> = {
* .name = "<call>",
* .class = event_class_<template>,
@@ -580,7 +578,6 @@ static struct ftrace_event_class __used event_class_##call = { \
#define DEFINE_EVENT(template, call, proto, args) \
\
static struct ftrace_event_call __used \
-__attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_events"))) event_##call = { \
.name = #call, \
.class = &event_class_##template, \
@@ -594,7 +591,6 @@ __attribute__((section("_ftrace_events"))) event_##call = { \
static const char print_fmt_##call[] = print; \
\
static struct ftrace_event_call __used \
-__attribute__((__aligned__(4))) \
__attribute__((section("_ftrace_events"))) event_##call = { \
.name = #call, \
.class = &event_class_##template, \
--
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