[git-pull -tip] x86: cleanup non-code changing

From: Jaswinder Singh Rajput
Date: Tue Mar 17 2009 - 07:47:47 EST

The following changes since commit 1f31834fbbb8de367914f044d3268c6afbfdd783:
Ingo Molnar (1):
Merge branch 'x86/mce2'

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/jaswinder/linux-2.6-tip.git master

Jaswinder Singh Rajput (8):
x86: i8237.c cleanup
x86: topology.c cleanup
x86: kdebugfs.c cleanup
x86: i8253 cleanup
x86: pci-nommu.c cleanup
x86: io_delay.c cleanup
x86: rtc.c cleanup
x86: tls.c cleanup

arch/x86/kernel/i8237.c | 5 ++-
arch/x86/kernel/i8253.c | 68 ++++++++++++++++++--------------------
arch/x86/kernel/io_delay.c | 6 ++--
arch/x86/kernel/kdebugfs.c | 76 ++++++++++++++++++++----------------------
arch/x86/kernel/pci-nommu.c | 29 +++++++++++------
arch/x86/kernel/rtc.c | 24 +++++++------
arch/x86/kernel/tls.c | 20 ++++++++---
arch/x86/kernel/topology.c | 14 ++++---
8 files changed, 129 insertions(+), 113 deletions(-)

Complete diff:
diff --git a/arch/x86/kernel/i8237.c b/arch/x86/kernel/i8237.c
index b42ca69..044ca09 100644
--- a/arch/x86/kernel/i8237.c
+++ b/arch/x86/kernel/i8237.c
@@ -9,9 +9,8 @@
* your option) any later version.
*/

-#include <linux/init.h>
#include <linux/sysdev.h>
-
+#include <linux/init.h>
#include <asm/dma.h>

/*
@@ -64,8 +63,10 @@ static struct sys_device device_i8237A = {
static int __init i8237A_init_sysfs(void)
{
int error = sysdev_class_register(&i8237_sysdev_class);
+
if (!error)
error = sysdev_register(&device_i8237A);
+
return error;
}
device_initcall(i8237A_init_sysfs);
diff --git a/arch/x86/kernel/i8253.c b/arch/x86/kernel/i8253.c
index 10f92fb..3475440 100644
--- a/arch/x86/kernel/i8253.c
+++ b/arch/x86/kernel/i8253.c
@@ -3,17 +3,17 @@
*
*/
#include <linux/clockchips.h>
-#include <linux/init.h>
#include <linux/interrupt.h>
+#include <linux/spinlock.h>
#include <linux/jiffies.h>
#include <linux/module.h>
-#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/io.h>

-#include <asm/smp.h>
-#include <asm/delay.h>
#include <asm/i8253.h>
-#include <asm/io.h>
#include <asm/hpet.h>
+#include <asm/smp.h>

DEFINE_SPINLOCK(i8253_lock);
EXPORT_SYMBOL(i8253_lock);
@@ -40,7 +40,7 @@ static void init_pit_timer(enum clock_event_mode mode,
{
spin_lock(&i8253_lock);

- switch(mode) {
+ switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
/* binary, mode 2, LSB/MSB, ch 0 */
outb_pit(0x34, PIT_MODE);
@@ -95,7 +95,7 @@ static int pit_next_event(unsigned long delta, struct clock_event_device *evt)
* registered. This mechanism replaces the previous #ifdef LOCAL_APIC -
* !using_apic_timer decisions in do_timer_interrupt_hook()
*/
-static struct clock_event_device pit_clockevent = {
+static struct clock_event_device pit_ce = {
.name = "pit",
.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
.set_mode = init_pit_timer,
@@ -114,15 +114,13 @@ void __init setup_pit_timer(void)
* Start pit with the boot cpu mask and make it global after the
* IO_APIC has been initialized.
*/
- pit_clockevent.cpumask = cpumask_of(smp_processor_id());
- pit_clockevent.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC,
- pit_clockevent.shift);
- pit_clockevent.max_delta_ns =
- clockevent_delta2ns(0x7FFF, &pit_clockevent);
- pit_clockevent.min_delta_ns =
- clockevent_delta2ns(0xF, &pit_clockevent);
- clockevents_register_device(&pit_clockevent);
- global_clock_event = &pit_clockevent;
+ pit_ce.cpumask = cpumask_of(smp_processor_id());
+ pit_ce.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC, pit_ce.shift);
+ pit_ce.max_delta_ns = clockevent_delta2ns(0x7FFF, &pit_ce);
+ pit_ce.min_delta_ns = clockevent_delta2ns(0xF, &pit_ce);
+
+ clockevents_register_device(&pit_ce);
+ global_clock_event = &pit_ce;
}

#ifndef CONFIG_X86_64
@@ -133,11 +131,11 @@ void __init setup_pit_timer(void)
*/
static cycle_t pit_read(void)
{
+ static int old_count;
+ static u32 old_jifs;
unsigned long flags;
int count;
u32 jifs;
- static int old_count;
- static u32 old_jifs;

spin_lock_irqsave(&i8253_lock, flags);
/*
@@ -179,9 +177,9 @@ static cycle_t pit_read(void)
* Previous attempts to handle these cases intelligently were
* buggy, so we just do the simple thing now.
*/
- if (count > old_count && jifs == old_jifs) {
+ if (count > old_count && jifs == old_jifs)
count = old_count;
- }
+
old_count = count;
old_jifs = jifs;

@@ -192,13 +190,13 @@ static cycle_t pit_read(void)
return (cycle_t)(jifs * LATCH) + count;
}

-static struct clocksource clocksource_pit = {
- .name = "pit",
- .rating = 110,
- .read = pit_read,
- .mask = CLOCKSOURCE_MASK(32),
- .mult = 0,
- .shift = 20,
+static struct clocksource pit_cs = {
+ .name = "pit",
+ .rating = 110,
+ .read = pit_read,
+ .mask = CLOCKSOURCE_MASK(32),
+ .mult = 0,
+ .shift = 20,
};

static void pit_disable_clocksource(void)
@@ -206,9 +204,9 @@ static void pit_disable_clocksource(void)
/*
* Use mult to check whether it is registered or not
*/
- if (clocksource_pit.mult) {
- clocksource_unregister(&clocksource_pit);
- clocksource_pit.mult = 0;
+ if (pit_cs.mult) {
+ clocksource_unregister(&pit_cs);
+ pit_cs.mult = 0;
}
}

@@ -222,13 +220,13 @@ static int __init init_pit_clocksource(void)
* - when local APIC timer is active (PIT is switched off)
*/
if (num_possible_cpus() > 1 || is_hpet_enabled() ||
- pit_clockevent.mode != CLOCK_EVT_MODE_PERIODIC)
+ pit_ce.mode != CLOCK_EVT_MODE_PERIODIC)
return 0;

- clocksource_pit.mult = clocksource_hz2mult(CLOCK_TICK_RATE,
- clocksource_pit.shift);
- return clocksource_register(&clocksource_pit);
+ pit_cs.mult = clocksource_hz2mult(CLOCK_TICK_RATE, pit_cs.shift);
+
+ return clocksource_register(&pit_cs);
}
arch_initcall(init_pit_clocksource);

-#endif
+#endif /* !CONFIG_X86_64 */
diff --git a/arch/x86/kernel/io_delay.c b/arch/x86/kernel/io_delay.c
index 720d260..f222215 100644
--- a/arch/x86/kernel/io_delay.c
+++ b/arch/x86/kernel/io_delay.c
@@ -7,10 +7,10 @@
*/
#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/delay.h>
+#include <linux/init.h>
#include <linux/dmi.h>
-#include <asm/io.h>
+#include <linux/io.h>

int io_delay_type __read_mostly = CONFIG_DEFAULT_IO_DELAY_TYPE;

@@ -126,7 +126,7 @@ static int __init io_delay_param(char *s)
return -EINVAL;

io_delay_override = 1;
+
return 0;
}
-
early_param("io_delay", io_delay_param);
diff --git a/arch/x86/kernel/kdebugfs.c b/arch/x86/kernel/kdebugfs.c
index ff7d3b0..0e05c30 100644
--- a/arch/x86/kernel/kdebugfs.c
+++ b/arch/x86/kernel/kdebugfs.c
@@ -8,11 +8,11 @@
*/
#include <linux/debugfs.h>
#include <linux/uaccess.h>
-#include <linux/stat.h>
+#include <linux/module.h>
#include <linux/init.h>
+#include <linux/stat.h>
#include <linux/io.h>
#include <linux/mm.h>
-#include <linux/module.h>

#include <asm/setup.h>

@@ -26,9 +26,8 @@ struct setup_data_node {
u32 len;
};

-static ssize_t
-setup_data_read(struct file *file, char __user *user_buf, size_t count,
- loff_t *ppos)
+static ssize_t setup_data_read(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
{
struct setup_data_node *node = file->private_data;
unsigned long remain;
@@ -39,20 +38,21 @@ setup_data_read(struct file *file, char __user *user_buf, size_t count,

if (pos < 0)
return -EINVAL;
+
if (pos >= node->len)
return 0;

if (count > node->len - pos)
count = node->len - pos;
+
pa = node->paddr + sizeof(struct setup_data) + pos;
pg = pfn_to_page((pa + count - 1) >> PAGE_SHIFT);
if (PageHighMem(pg)) {
p = ioremap_cache(pa, count);
if (!p)
return -ENXIO;
- } else {
+ } else
p = __va(pa);
- }

remain = copy_to_user(user_buf, p, count);

@@ -70,12 +70,13 @@ setup_data_read(struct file *file, char __user *user_buf, size_t count,
static int setup_data_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
+
return 0;
}

static const struct file_operations fops_setup_data = {
- .read = setup_data_read,
- .open = setup_data_open,
+ .read = setup_data_read,
+ .open = setup_data_open,
};

static int __init
@@ -84,24 +85,20 @@ create_setup_data_node(struct dentry *parent, int no,
{
struct dentry *d, *type, *data;
char buf[16];
- int error;

sprintf(buf, "%d", no);
d = debugfs_create_dir(buf, parent);
- if (!d) {
- error = -ENOMEM;
+ if (!d)
goto err_return;
- }
+
type = debugfs_create_x32("type", S_IRUGO, d, &node->type);
- if (!type) {
- error = -ENOMEM;
+ if (!type)
goto err_dir;
- }
+
data = debugfs_create_file("data", S_IRUGO, d, node, &fops_setup_data);
- if (!data) {
- error = -ENOMEM;
+ if (!data)
goto err_type;
- }
+
return 0;

err_type:
@@ -109,32 +106,29 @@ err_type:
err_dir:
debugfs_remove(d);
err_return:
- return error;
+ return -ENOMEM;
}

static int __init create_setup_data_nodes(struct dentry *parent)
{
struct setup_data_node *node;
struct setup_data *data;
- int error, no = 0;
+ int error = 0, no = 0;
struct dentry *d;
struct page *pg;
u64 pa_data;

d = debugfs_create_dir("setup_data", parent);
- if (!d) {
- error = -ENOMEM;
+ if (!d)
goto err_return;
- }

pa_data = boot_params.hdr.setup_data;

while (pa_data) {
node = kmalloc(sizeof(*node), GFP_KERNEL);
- if (!node) {
- error = -ENOMEM;
+ if (!node)
goto err_dir;
- }
+
pg = pfn_to_page((pa_data+sizeof(*data)-1) >> PAGE_SHIFT);
if (PageHighMem(pg)) {
data = ioremap_cache(pa_data, sizeof(*data));
@@ -143,9 +137,8 @@ static int __init create_setup_data_nodes(struct dentry *parent)
error = -ENXIO;
goto err_dir;
}
- } else {
+ } else
data = __va(pa_data);
- }

node->paddr = pa_data;
node->type = data->type;
@@ -159,11 +152,14 @@ static int __init create_setup_data_nodes(struct dentry *parent)
goto err_dir;
no++;
}
+
return 0;

err_dir:
debugfs_remove(d);
err_return:
+ if (!error)
+ error = -ENOMEM;
return error;
}

@@ -175,28 +171,26 @@ static struct debugfs_blob_wrapper boot_params_blob = {
static int __init boot_params_kdebugfs_init(void)
{
struct dentry *dbp, *version, *data;
- int error;
+ int error = 0;

dbp = debugfs_create_dir("boot_params", NULL);
- if (!dbp) {
- error = -ENOMEM;
+ if (!dbp)
goto err_return;
- }
+
version = debugfs_create_x16("version", S_IRUGO, dbp,
&boot_params.hdr.version);
- if (!version) {
- error = -ENOMEM;
+ if (!version)
goto err_dir;
- }
+
data = debugfs_create_blob("data", S_IRUGO, dbp,
&boot_params_blob);
- if (!data) {
- error = -ENOMEM;
+ if (!data)
goto err_version;
- }
+
error = create_setup_data_nodes(dbp);
if (error)
goto err_data;
+
return 0;

err_data:
@@ -206,9 +200,11 @@ err_version:
err_dir:
debugfs_remove(dbp);
err_return:
+ if (!error)
+ error = -ENOMEM;
return error;
}
-#endif
+#endif /* CONFIG_DEBUG_BOOT_PARAMS */

static int __init arch_kdebugfs_init(void)
{
diff --git a/arch/x86/kernel/pci-nommu.c b/arch/x86/kernel/pci-nommu.c
index fe50214..b240d1b 100644
--- a/arch/x86/kernel/pci-nommu.c
+++ b/arch/x86/kernel/pci-nommu.c
@@ -1,14 +1,14 @@
/* Fallback functions when the main IOMMU code is not compiled in. This
code is roughly equivalent to i386. */
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/pci.h>
-#include <linux/string.h>
#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/mm.h>

-#include <asm/iommu.h>
#include <asm/processor.h>
+#include <asm/iommu.h>
#include <asm/dma.h>

static int
@@ -20,8 +20,10 @@ check_addr(char *name, struct device *hwdev, dma_addr_t bus, size_t size)
"nommu_%s: overflow %Lx+%zu of device mask %Lx\n",
name, (long long)bus, size,
(long long)*hwdev->dma_mask);
+
return 0;
}
+
return 1;
}

@@ -31,10 +33,14 @@ static dma_addr_t nommu_map_page(struct device *dev, struct page *page,
struct dma_attrs *attrs)
{
dma_addr_t bus = page_to_phys(page) + offset;
+
WARN_ON(size == 0);
+
if (!check_addr("map_single", dev, bus, size))
return bad_dma_address;
+
flush_write_buffers();
+
return bus;
}

@@ -65,11 +71,14 @@ static int nommu_map_sg(struct device *hwdev, struct scatterlist *sg,
for_each_sg(sg, s, nents, i) {
BUG_ON(!sg_page(s));
s->dma_address = sg_phys(s);
+
if (!check_addr("map_sg", hwdev, s->dma_address, s->length))
return 0;
+
s->dma_length = s->length;
}
flush_write_buffers();
+
return nents;
}

@@ -80,11 +89,11 @@ static void nommu_free_coherent(struct device *dev, size_t size, void *vaddr,
}

struct dma_map_ops nommu_dma_ops = {
- .alloc_coherent = dma_generic_alloc_coherent,
- .free_coherent = nommu_free_coherent,
- .map_sg = nommu_map_sg,
- .map_page = nommu_map_page,
- .is_phys = 1,
+ .alloc_coherent = dma_generic_alloc_coherent,
+ .free_coherent = nommu_free_coherent,
+ .map_sg = nommu_map_sg,
+ .map_page = nommu_map_page,
+ .is_phys = 1,
};

void __init no_iommu_init(void)
diff --git a/arch/x86/kernel/rtc.c b/arch/x86/kernel/rtc.c
index dd6f2b7..8f369d7 100644
--- a/arch/x86/kernel/rtc.c
+++ b/arch/x86/kernel/rtc.c
@@ -1,14 +1,14 @@
/*
* RTC related functions
*/
+#include <linux/platform_device.h>
+#include <linux/mc146818rtc.h>
#include <linux/acpi.h>
#include <linux/bcd.h>
-#include <linux/mc146818rtc.h>
-#include <linux/platform_device.h>
#include <linux/pnp.h>

-#include <asm/time.h>
#include <asm/vsyscall.h>
+#include <asm/time.h>

#ifdef CONFIG_X86_32
/*
@@ -16,9 +16,9 @@
* register we are working with. It is required for NMI access to the
* CMOS/RTC registers. See include/asm-i386/mc146818rtc.h for details.
*/
-volatile unsigned long cmos_lock = 0;
+volatile unsigned long cmos_lock;
EXPORT_SYMBOL(cmos_lock);
-#endif
+#endif /* CONFIG_X86_32 */

/* For two digit years assume time is always after that */
#define CMOS_YEARS_OFFS 2000
@@ -38,9 +38,9 @@ EXPORT_SYMBOL(rtc_lock);
*/
int mach_set_rtc_mmss(unsigned long nowtime)
{
- int retval = 0;
int real_seconds, real_minutes, cmos_minutes;
unsigned char save_control, save_freq_select;
+ int retval = 0;

/* tell the clock it's being set */
save_control = CMOS_READ(RTC_CONTROL);
@@ -72,8 +72,8 @@ int mach_set_rtc_mmss(unsigned long nowtime)
real_seconds = bin2bcd(real_seconds);
real_minutes = bin2bcd(real_minutes);
}
- CMOS_WRITE(real_seconds,RTC_SECONDS);
- CMOS_WRITE(real_minutes,RTC_MINUTES);
+ CMOS_WRITE(real_seconds, RTC_SECONDS);
+ CMOS_WRITE(real_minutes, RTC_MINUTES);
} else {
printk(KERN_WARNING
"set_rtc_mmss: can't update from %d to %d\n",
@@ -118,7 +118,7 @@ unsigned long mach_get_cmos_time(void)
if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
acpi_gbl_FADT.century)
century = CMOS_READ(acpi_gbl_FADT.century);
-#endif
+#endif /* CONFIG_ACPI */

status = CMOS_READ(RTC_CONTROL);
WARN_ON_ONCE(RTC_ALWAYS_BCD && (status & RTC_DM_BINARY));
@@ -151,6 +151,7 @@ unsigned char rtc_cmos_read(unsigned char addr)
outb(addr, RTC_PORT(0));
val = inb(RTC_PORT(1));
lock_cmos_suffix(addr);
+
return val;
}
EXPORT_SYMBOL(rtc_cmos_read);
@@ -166,8 +167,8 @@ EXPORT_SYMBOL(rtc_cmos_write);

static int set_rtc_mmss(unsigned long nowtime)
{
- int retval;
unsigned long flags;
+ int retval;

spin_lock_irqsave(&rtc_lock, flags);
retval = set_wallclock(nowtime);
@@ -237,11 +238,12 @@ static __init int add_rtc_cmos(void)
}
}
}
-#endif
+#endif /* CONFIG_PNP */

platform_device_register(&rtc_device);
dev_info(&rtc_device.dev,
"registered platform RTC device (no PNP device found)\n");
+
return 0;
}
device_initcall(add_rtc_cmos);
diff --git a/arch/x86/kernel/tls.c b/arch/x86/kernel/tls.c
index 6bb7b85..2990598 100644
--- a/arch/x86/kernel/tls.c
+++ b/arch/x86/kernel/tls.c
@@ -1,16 +1,16 @@
+#include <linux/uaccess.h>
#include <linux/kernel.h>
+#include <linux/regset.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/user.h>
-#include <linux/regset.h>

-#include <asm/uaccess.h>
-#include <asm/desc.h>
-#include <asm/system.h>
-#include <asm/ldt.h>
#include <asm/processor.h>
-#include <asm/proto.h>
#include <asm/syscalls.h>
+#include <asm/system.h>
+#include <asm/proto.h>
+#include <asm/desc.h>
+#include <asm/ldt.h>

#include "tls.h"

@@ -25,6 +25,7 @@ static int get_free_idx(void)
for (idx = 0; idx < GDT_ENTRY_TLS_ENTRIES; idx++)
if (desc_empty(&t->tls_array[idx]))
return idx + GDT_ENTRY_TLS_MIN;
+
return -ESRCH;
}

@@ -93,7 +94,9 @@ int do_set_thread_area(struct task_struct *p, int idx,
asmlinkage int sys_set_thread_area(struct user_desc __user *u_info)
{
int ret = do_set_thread_area(current, -1, u_info, 1);
+
asmlinkage_protect(1, ret, u_info);
+
return ret;
}

@@ -137,13 +140,16 @@ int do_get_thread_area(struct task_struct *p, int idx,

if (copy_to_user(u_info, &info, sizeof(info)))
return -EFAULT;
+
return 0;
}

asmlinkage int sys_get_thread_area(struct user_desc __user *u_info)
{
int ret = do_get_thread_area(current, -1, u_info);
+
asmlinkage_protect(1, ret, u_info);
+
return ret;
}

@@ -152,8 +158,10 @@ int regset_tls_active(struct task_struct *target,
{
struct thread_struct *t = &target->thread;
int n = GDT_ENTRY_TLS_ENTRIES;
+
while (n > 0 && desc_empty(&t->tls_array[n - 1]))
--n;
+
return n;
}

diff --git a/arch/x86/kernel/topology.c b/arch/x86/kernel/topology.c
index 0fcc95a..7e45159 100644
--- a/arch/x86/kernel/topology.c
+++ b/arch/x86/kernel/topology.c
@@ -25,10 +25,10 @@
*
* Send feedback to <colpatch@xxxxxxxxxx>
*/
-#include <linux/init.h>
-#include <linux/smp.h>
#include <linux/nodemask.h>
#include <linux/mmzone.h>
+#include <linux/init.h>
+#include <linux/smp.h>
#include <asm/cpu.h>

static DEFINE_PER_CPU(struct x86_cpu, cpu_devices);
@@ -47,6 +47,7 @@ int __ref arch_register_cpu(int num)
*/
if (num)
per_cpu(cpu_devices, num).cpu.hotpluggable = 1;
+
return register_cpu(&per_cpu(cpu_devices, num).cpu, num);
}
EXPORT_SYMBOL(arch_register_cpu);
@@ -56,12 +57,13 @@ void arch_unregister_cpu(int num)
unregister_cpu(&per_cpu(cpu_devices, num).cpu);
}
EXPORT_SYMBOL(arch_unregister_cpu);
-#else
+#else /* CONFIG_HOTPLUG_CPU */
+
static int __init arch_register_cpu(int num)
{
return register_cpu(&per_cpu(cpu_devices, num).cpu, num);
}
-#endif /*CONFIG_HOTPLUG_CPU*/
+#endif /* CONFIG_HOTPLUG_CPU */

static int __init topology_init(void)
{
@@ -70,11 +72,11 @@ static int __init topology_init(void)
#ifdef CONFIG_NUMA
for_each_online_node(i)
register_one_node(i);
-#endif /* CONFIG_NUMA */
+#endif

for_each_present_cpu(i)
arch_register_cpu(i);
+
return 0;
}
-
subsys_initcall(topology_init);


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