[PATCH 1/1] kernel: Used macros from compiler.h instead of __attribute__((...))
From: Gideon Israel Dsouza
Date: Sun Feb 09 2014 - 02:24:46 EST
To increase compiler portability there is <linux/compiler.h> which
provides convenience macros for various gcc constructs. Eg: __weak
for __attribute__((weak)). I've replaced all instances of gcc
attributes with the right macro in the kernel subsystem.
Signed-off-by: Gideon Israel Dsouza <gidisrael@xxxxxxxxx>
---
kernel/fork.c | 3 ++-
kernel/kallsyms.c | 11 ++++++-----
kernel/kexec.c | 5 +++--
kernel/ksysfs.c | 5 +++--
kernel/power/power.h | 3 ++-
kernel/power/snapshot.c | 3 ++-
kernel/power/suspend.c | 5 +++--
kernel/power/swap.c | 2 +-
kernel/sched/clock.c | 3 ++-
kernel/sched/core.c | 3 ++-
kernel/signal.c | 4 +++-
kernel/time/timekeeping.c | 5 +++--
kernel/trace/trace.h | 3 ++-
13 files changed, 34 insertions(+), 21 deletions(-)
diff --git a/kernel/fork.c b/kernel/fork.c
index a17621c..ef29ed7 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -71,6 +71,7 @@
#include <linux/signalfd.h>
#include <linux/uprobes.h>
#include <linux/aio.h>
+#include <linux/compiler.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
@@ -283,7 +284,7 @@ void __init fork_init(unsigned long mempages)
init_task.signal->rlim[RLIMIT_NPROC];
}
-int __attribute__((weak)) arch_dup_task_struct(struct task_struct *dst,
+int __weak arch_dup_task_struct(struct task_struct *dst,
struct task_struct *src)
{
*dst = *src;
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index 3127ad5..cb0cf37 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -23,6 +23,7 @@
#include <linux/mm.h>
#include <linux/ctype.h>
#include <linux/slab.h>
+#include <linux/compiler.h>
#include <asm/sections.h>
@@ -36,8 +37,8 @@
* These will be re-linked against their real values
* during the second link stage.
*/
-extern const unsigned long kallsyms_addresses[] __attribute__((weak));
-extern const u8 kallsyms_names[] __attribute__((weak));
+extern const unsigned long kallsyms_addresses[] __weak;
+extern const u8 kallsyms_names[] __weak;
/*
* Tell the compiler that the count isn't in the small data section if the arch
@@ -46,10 +47,10 @@ extern const u8 kallsyms_names[] __attribute__((weak));
extern const unsigned long kallsyms_num_syms
__attribute__((weak, section(".rodata")));
-extern const u8 kallsyms_token_table[] __attribute__((weak));
-extern const u16 kallsyms_token_index[] __attribute__((weak));
+extern const u8 kallsyms_token_table[] __weak;
+extern const u16 kallsyms_token_index[] __weak;
-extern const unsigned long kallsyms_markers[] __attribute__((weak));
+extern const unsigned long kallsyms_markers[] __weak;
static inline int is_kernel_inittext(unsigned long addr)
{
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 60bafbe..57c3725 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -32,6 +32,7 @@
#include <linux/vmalloc.h>
#include <linux/swap.h>
#include <linux/syscore_ops.h>
+#include <linux/compiler.h>
#include <asm/page.h>
#include <asm/uaccess.h>
@@ -1551,10 +1552,10 @@ void vmcoreinfo_append_str(const char *fmt, ...)
* provide an empty default implementation here -- architecture
* code may override this
*/
-void __attribute__ ((weak)) arch_crash_save_vmcoreinfo(void)
+void __weak arch_crash_save_vmcoreinfo(void)
{}
-unsigned long __attribute__ ((weak)) paddr_vmcoreinfo_note(void)
+unsigned long __weak paddr_vmcoreinfo_note(void)
{
return __pa((unsigned long)(char *)&vmcoreinfo_note);
}
diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
index d945a94..01f3486 100644
--- a/kernel/ksysfs.c
+++ b/kernel/ksysfs.c
@@ -18,6 +18,7 @@
#include <linux/stat.h>
#include <linux/sched.h>
#include <linux/capability.h>
+#include <linux/compiler.h>
#define KERNEL_ATTR_RO(_name) \
static struct kobj_attribute _name##_attr = __ATTR_RO(_name)
@@ -160,8 +161,8 @@ KERNEL_ATTR_RW(rcu_expedited);
/*
* Make /sys/kernel/notes give the raw contents of our kernel .notes section.
*/
-extern const void __start_notes __attribute__((weak));
-extern const void __stop_notes __attribute__((weak));
+extern const void __start_notes __weak;
+extern const void __stop_notes __weak;
#define notes_size (&__stop_notes - &__start_notes)
static ssize_t notes_read(struct file *filp, struct kobject *kobj,
diff --git a/kernel/power/power.h b/kernel/power/power.h
index 7d4b7ff..5e158da 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -2,6 +2,7 @@
#include <linux/suspend_ioctls.h>
#include <linux/utsname.h>
#include <linux/freezer.h>
+#include <linux/compiler.h>
struct swsusp_info {
struct new_utsname uts;
@@ -11,7 +12,7 @@ struct swsusp_info {
unsigned long image_pages;
unsigned long pages;
unsigned long size;
-} __attribute__((aligned(PAGE_SIZE)));
+} __aligned(PAGE_SIZE);
#ifdef CONFIG_HIBERNATION
/* kernel/power/snapshot.c */
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index d9f61a1..b91b66a 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -27,6 +27,7 @@
#include <linux/highmem.h>
#include <linux/list.h>
#include <linux/slab.h>
+#include <linux/compiler.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
@@ -155,7 +156,7 @@ static inline void free_image_page(void *addr, int clear_nosave_free)
struct linked_page {
struct linked_page *next;
char data[LINKED_PAGE_DATA_SIZE];
-} __attribute__((packed));
+} __packed;
static inline void
free_list_of_pages(struct linked_page *list, int clear_page_nosave)
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 62ee437..d961190 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -26,6 +26,7 @@
#include <linux/syscore_ops.h>
#include <linux/ftrace.h>
#include <trace/events/power.h>
+#include <linux/compiler.h>
#include "power.h"
@@ -156,13 +157,13 @@ static int suspend_prepare(suspend_state_t state)
}
/* default implementation */
-void __attribute__ ((weak)) arch_suspend_disable_irqs(void)
+void __weak arch_suspend_disable_irqs(void)
{
local_irq_disable();
}
/* default implementation */
-void __attribute__ ((weak)) arch_suspend_enable_irqs(void)
+void __weak arch_suspend_enable_irqs(void)
{
local_irq_enable();
}
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index 7c33ed2..8c9a481 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -101,7 +101,7 @@ struct swsusp_header {
unsigned int flags; /* Flags to pass to the "boot" kernel */
char orig_sig[10];
char sig[10];
-} __attribute__((packed));
+} __packed;
static struct swsusp_header *swsusp_header;
diff --git a/kernel/sched/clock.c b/kernel/sched/clock.c
index 43c2bcc..d75cbd22 100644
--- a/kernel/sched/clock.c
+++ b/kernel/sched/clock.c
@@ -60,13 +60,14 @@
#include <linux/sched.h>
#include <linux/static_key.h>
#include <linux/workqueue.h>
+#include <linux/compiler.h>
/*
* Scheduler clock - returns current time in nanosec units.
* This is default implementation.
* Architectures and sub-architectures can override this.
*/
-unsigned long long __attribute__((weak)) sched_clock(void)
+unsigned long long __weak sched_clock(void)
{
return (unsigned long long)(jiffies - INITIAL_JIFFIES)
* (NSEC_PER_SEC / HZ);
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index b46131e..1af0218 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -73,6 +73,7 @@
#include <linux/init_task.h>
#include <linux/binfmts.h>
#include <linux/context_tracking.h>
+#include <linux/compiler.h>
#include <asm/switch_to.h>
#include <asm/tlb.h>
@@ -6451,7 +6452,7 @@ static cpumask_var_t fallback_doms;
* cpu core maps. It is supposed to return 1 if the topology changed
* or 0 if it stayed the same.
*/
-int __attribute__((weak)) arch_update_cpu_topology(void)
+int __weak arch_update_cpu_topology(void)
{
return 0;
}
diff --git a/kernel/signal.c b/kernel/signal.c
index 52f881d..ed3e35b 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -33,6 +33,8 @@
#include <linux/uprobes.h>
#include <linux/compat.h>
#include <linux/cn_proc.h>
+#include <linux/compiler.h>
+
#define CREATE_TRACE_POINTS
#include <trace/events/signal.h>
@@ -3618,7 +3620,7 @@ SYSCALL_DEFINE3(sigsuspend, int, unused1, int, unused2, old_sigset_t, mask)
}
#endif
-__attribute__((weak)) const char *arch_vma_name(struct vm_area_struct *vma)
+__weak const char *arch_vma_name(struct vm_area_struct *vma)
{
return NULL;
}
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 0aa4ce8..8c367e1 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -22,6 +22,7 @@
#include <linux/tick.h>
#include <linux/stop_machine.h>
#include <linux/pvclock_gtod.h>
+#include <linux/compiler.h>
#include "tick-internal.h"
#include "ntp_internal.h"
@@ -760,7 +761,7 @@ u64 timekeeping_max_deferment(void)
*
* XXX - Do be sure to remove it once all arches implement it.
*/
-void __attribute__((weak)) read_persistent_clock(struct timespec *ts)
+void __weak read_persistent_clock(struct timespec *ts)
{
ts->tv_sec = 0;
ts->tv_nsec = 0;
@@ -775,7 +776,7 @@ void __attribute__((weak)) read_persistent_clock(struct timespec *ts)
*
* XXX - Do be sure to remove it once all arches implement it.
*/
-void __attribute__((weak)) read_boot_clock(struct timespec *ts)
+void __weak read_boot_clock(struct timespec *ts)
{
ts->tv_sec = 0;
ts->tv_nsec = 0;
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 02b592f..326501f 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -13,6 +13,7 @@
#include <linux/hw_breakpoint.h>
#include <linux/trace_seq.h>
#include <linux/ftrace_event.h>
+#include <linux/compiler.h>
#ifdef CONFIG_FTRACE_SYSCALLS
#include <asm/unistd.h> /* For NR_SYSCALLS */
@@ -1249,7 +1250,7 @@ int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled);
#undef FTRACE_ENTRY
#define FTRACE_ENTRY(call, struct_name, id, tstruct, print, filter) \
extern struct ftrace_event_call \
- __attribute__((__aligned__(4))) event_##call;
+ __aligned(4) event_##call;
#undef FTRACE_ENTRY_DUP
#define FTRACE_ENTRY_DUP(call, struct_name, id, tstruct, print, filter) \
FTRACE_ENTRY(call, struct_name, id, PARAMS(tstruct), PARAMS(print), \
--
1.8.4.2
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