[tip:perfcounters/core] perf_counter: Tidy up style details

tip-bot for Ingo Molnar
2009-06-01T17:58:52Z

Commit-ID: 22a4f650d686eeaac3629dae1c4294381485efdf
Gitweb: http://git.kernel.org/tip/22a4f650d686eeaac3629dae1c4294381485efdf
Author: Ingo Molnar <mingo@elte.hu>
AuthorDate: Mon, 1 Jun 2009 10:13:37 +0200
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Mon, 1 Jun 2009 19:55:32 +0200

perf_counter: Tidy up style details

- whitespace fixlets
- make local variable definitions more consistent

[ Impact: cleanup ]

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Kacur <jkacur@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

---
include/linux/perf_counter.h | 2 +-
kernel/perf_counter.c | 39 +++++++++++++++++++++------------------
2 files changed, 22 insertions(+), 19 deletions(-)

diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index 81ec79c..0e57d8c 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -562,7 +562,7 @@ struct perf_cpu_context {
*
* task, softirq, irq, nmi context
*/
- int recursion[4];
+ int recursion[4];
};

#ifdef CONFIG_PERF_COUNTERS
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index ff8b463..df319c4 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -16,8 +16,9 @@
#include <linux/file.h>
#include <linux/poll.h>
#include <linux/sysfs.h>
-#include <linux/ptrace.h>
+#include <linux/dcache.h>
#include <linux/percpu.h>
+#include <linux/ptrace.h>
#include <linux/vmstat.h>
#include <linux/hardirq.h>
#include <linux/rculist.h>
@@ -26,7 +27,6 @@
#include <linux/anon_inodes.h>
#include <linux/kernel_stat.h>
#include <linux/perf_counter.h>
-#include <linux/dcache.h>

#include <asm/irq_regs.h>

@@ -65,7 +65,9 @@ void __weak hw_perf_disable(void) { barrier(); }
void __weak hw_perf_enable(void) { barrier(); }

void __weak hw_perf_counter_setup(int cpu) { barrier(); }
-int __weak hw_perf_group_sched_in(struct perf_counter *group_leader,
+
+int __weak
+hw_perf_group_sched_in(struct perf_counter *group_leader,
struct perf_cpu_context *cpuctx,
struct perf_counter_context *ctx, int cpu)
{
@@ -127,8 +129,8 @@ static void put_ctx(struct perf_counter_context *ctx)
* This has to cope with with the fact that until it is locked,
* the context could get moved to another task.
*/
-static struct perf_counter_context *perf_lock_task_context(
- struct task_struct *task, unsigned long *flags)
+static struct perf_counter_context *
+perf_lock_task_context(struct task_struct *task, unsigned long *flags)
{
struct perf_counter_context *ctx;

@@ -1330,9 +1332,9 @@ __perf_counter_init_context(struct perf_counter_context *ctx,

static struct perf_counter_context *find_get_context(pid_t pid, int cpu)
{
- struct perf_cpu_context *cpuctx;
- struct perf_counter_context *ctx;
struct perf_counter_context *parent_ctx;
+ struct perf_counter_context *ctx;
+ struct perf_cpu_context *cpuctx;
struct task_struct *task;
unsigned long flags;
int err;
@@ -1664,8 +1666,8 @@ int perf_counter_task_disable(void)
*/
void perf_counter_update_userpage(struct perf_counter *counter)
{
- struct perf_mmap_data *data;
struct perf_counter_mmap_page *userpg;
+ struct perf_mmap_data *data;

rcu_read_lock();
data = rcu_dereference(counter->data);
@@ -1769,10 +1771,11 @@ fail:

static void __perf_mmap_data_free(struct rcu_head *rcu_head)
{
- struct perf_mmap_data *data = container_of(rcu_head,
- struct perf_mmap_data, rcu_head);
+ struct perf_mmap_data *data;
int i;

+ data = container_of(rcu_head, struct perf_mmap_data, rcu_head);
+
free_page((unsigned long)data->user_page);
for (i = 0; i < data->nr_pages; i++)
free_page((unsigned long)data->data_pages[i]);
@@ -1801,8 +1804,7 @@ static void perf_mmap_close(struct vm_area_struct *vma)
struct perf_counter *counter = vma->vm_file->private_data;

WARN_ON_ONCE(counter->ctx->parent_ctx);
- if (atomic_dec_and_mutex_lock(&counter->mmap_count,
- &counter->mmap_mutex)) {
+ if (atomic_dec_and_mutex_lock(&counter->mmap_count, &counter->mmap_mutex)) {
struct user_struct *user = current_user();

atomic_long_sub(counter->data->nr_pages + 1, &user->locked_vm);
@@ -1821,11 +1823,11 @@ static struct vm_operations_struct perf_mmap_vmops = {
static int perf_mmap(struct file *file, struct vm_area_struct *vma)
{
struct perf_counter *counter = file->private_data;
+ unsigned long user_locked, user_lock_limit;
struct user_struct *user = current_user();
+ unsigned long locked, lock_limit;
unsigned long vma_size;
unsigned long nr_pages;
- unsigned long user_locked, user_lock_limit;
- unsigned long locked, lock_limit;
long user_extra, extra;
int ret = 0;

@@ -1900,8 +1902,8 @@ unlock:

static int perf_fasync(int fd, struct file *filp, int on)
{
- struct perf_counter *counter = filp->private_data;
struct inode *inode = filp->f_path.dentry->d_inode;
+ struct perf_counter *counter = filp->private_data;
int retval;

mutex_lock(&inode->i_mutex);
@@ -2412,8 +2414,8 @@ static void perf_counter_output(struct perf_counter *counter,
*/

struct perf_comm_event {
- struct task_struct *task;
- char *comm;
+ struct task_struct *task;
+ char *comm;
int comm_size;

struct {
@@ -2932,6 +2934,7 @@ static void perf_swcounter_add(struct perf_counter *counter, u64 nr,
int nmi, struct pt_regs *regs, u64 addr)
{
int neg = atomic64_add_negative(nr, &counter->hw.count);
+
if (counter->hw.irq_period && !neg)
perf_swcounter_overflow(counter, nmi, regs, addr);
}
@@ -3526,7 +3529,7 @@ inherit_counter(struct perf_counter *parent_counter,
/*
* Make the child state follow the state of the parent counter,
* not its hw_event.disabled bit. We hold the parent's mutex,
- * so we won't race with perf_counter_{en,dis}able_family.
+ * so we won't race with perf_counter_{en, dis}able_family.
*/
if (parent_counter->state >= PERF_COUNTER_STATE_INACTIVE)
child_counter->state = PERF_COUNTER_STATE_INACTIVE;