[PATCH] oprofile update

This makes the following changes :
 o headers cleanup
 o remove deprecated kernel_only
 o mention minimum oprofile version
 o correct initialise stats
 o remove racy debug check (wli saw this oops)
 o remove pointless simple_open
 o add dump functionality
 o remove pessimising FASTCALL

It fixes a critical race.

Documentation/Changes

@@ -61,6 +61,7 @@ o  pcmcia-cs              3.1.21                  # cardmgr -V
 o  PPP                    2.4.0                   # pppd --version
 o  isdn4k-utils           3.1pre1                 # isdnctrl 2>&1|grep version
 o  procps                 2.0.9                   # ps --version
+o  oprofile               0.5                     # oprofiled --version
 
 Kernel compilation
 ==================
@@ -368,6 +369,10 @@ Ip-route2
 ---------
 o  <ftp://ftp.inr.ac.ru/ip-routing/iproute2-2.2.4-now-ss991023.tar.gz>
 
+OProfile
+--------
+o  <http://oprofile.sf.net/download.php3>
+ 
 Suggestions and corrections
 ===========================
 

arch/i386/oprofile/init.c

@@ -7,7 +7,6 @@
  * @author John Levon <levon@movementarian.org>
  */
 
-#include <linux/kernel.h>
 #include <linux/oprofile.h>
 #include <linux/init.h>
  

arch/i386/oprofile/nmi_int.c

@@ -7,19 +7,13 @@
  * @author John Levon <levon@movementarian.org>
  */
 
-#include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/notifier.h>
 #include <linux/smp.h>
 #include <linux/oprofile.h>
-#include <linux/pm.h>
-#include <linux/thread_info.h>
 #include <asm/nmi.h>
-#include <asm/ptrace.h>
 #include <asm/msr.h>
 #include <asm/apic.h>
-#include <asm/bitops.h>
-#include <asm/processor.h>
  
 #include "op_counter.h"
 #include "op_x86_model.h"
@@ -27,7 +21,6 @@
 static struct op_x86_model_spec const * model;
 static struct op_msrs cpu_msrs[NR_CPUS];
 static unsigned long saved_lvtpc[NR_CPUS];
-static unsigned long kernel_only;
  
 static int nmi_start(void);
 static void nmi_stop(void);
@@ -53,10 +46,9 @@ static int oprofile_pm_callback(struct pm_dev * dev,
 }
  
  
-// FIXME: kernel_only
 static int nmi_callback(struct pt_regs * regs, int cpu)
 {
-	return (model->check_ctrs(cpu, &cpu_msrs[cpu], regs));
+	return model->check_ctrs(cpu, &cpu_msrs[cpu], regs);
 }
  
  
@@ -210,7 +202,6 @@ static int nmi_create_files(struct super_block * sb, struct dentry * root)
 		oprofilefs_create_ulong(sb, dir, "user", &counter_config[i].user); 
 	}
 
-	oprofilefs_create_ulong(sb, root, "kernel_only", &kernel_only);
 	return 0;
 }
  

drivers/oprofile/buffer_sync.c

@@ -19,17 +19,17 @@
  * objects.
  */
 
-#include <linux/fs.h>
 #include <linux/mm.h>
-#include <linux/timer.h>
-#include <linux/dcookies.h>
+#include <linux/workqueue.h>
 #include <linux/notifier.h>
+#include <linux/dcookies.h>
 #include <linux/profile.h>
-#include <linux/workqueue.h>
+#include <linux/fs.h>
  
+#include "oprofile_stats.h"
 #include "event_buffer.h"
 #include "cpu_buffer.h"
-#include "oprofile_stats.h"
+#include "buffer_sync.h"
  
 #define DEFAULT_EXPIRE (HZ / 4)
  

drivers/oprofile/cpu_buffer.c

@@ -19,13 +19,10 @@
 
 #include <linux/sched.h>
 #include <linux/vmalloc.h>
-#include <linux/smp.h>
 #include <linux/errno.h>
-#include <linux/cache.h>
  
 #include "cpu_buffer.h"
 #include "oprof.h"
-#include "oprofile_stats.h"
 
 struct oprofile_cpu_buffer cpu_buffer[NR_CPUS] __cacheline_aligned;
 
@@ -68,6 +65,7 @@ int alloc_cpu_buffers(void)
 		b->sample_received = 0;
 		b->sample_lost_locked = 0;
 		b->sample_lost_overflow = 0;
+		b->sample_lost_task_exit = 0;
 	}
 	return 0;
 fail:
@@ -92,9 +90,6 @@ void oprofile_add_sample(unsigned long eip, unsigned long event, int cpu)
 	struct oprofile_cpu_buffer * cpu_buf = &cpu_buffer[cpu];
 	struct task_struct * task;
 
-	/* temporary ? */
-	BUG_ON(!oprofile_started);
- 
 	cpu_buf->sample_received++;
  
 	if (!spin_trylock(&cpu_buf->int_lock)) {

drivers/oprofile/event_buffer.c

@@ -12,19 +12,15 @@
  * escape value ESCAPE_CODE followed by an identifying code.
  */
 
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
 #include <linux/vmalloc.h>
-#include <linux/smp.h>
-#include <linux/dcookies.h>
 #include <linux/oprofile.h>
+#include <linux/sched.h>
+#include <linux/dcookies.h>
+#include <linux/fs.h>
 #include <asm/uaccess.h>
-#include <asm/atomic.h>
  
-#include "event_buffer.h"
-#include "cpu_buffer.h"
 #include "oprof.h"
+#include "event_buffer.h"
 #include "oprofile_stats.h"
 
 DECLARE_MUTEX(buffer_sem);

drivers/oprofile/event_buffer.h

@@ -11,7 +11,7 @@
 #define EVENT_BUFFER_H
 
 #include <linux/types.h> 
-#include <linux/sem.h>
+#include <asm/semaphore.h>
  
 int alloc_event_buffer(void);
 

drivers/oprofile/oprof.c

@@ -10,12 +10,8 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/notifier.h>
-#include <linux/profile.h>
 #include <linux/oprofile.h>
+#include <asm/semaphore.h>
 
 #include "oprof.h"
 #include "event_buffer.h"
@@ -82,11 +78,12 @@ int oprofile_start(void)
 	if (oprofile_started)
 		goto out;
  
+	oprofile_reset_stats();
+
 	if ((err = oprofile_ops->start()))
 		goto out;
 
 	oprofile_started = 1;
-	oprofile_reset_stats();
 out:
 	up(&start_sem); 
 	return err;
@@ -148,6 +145,10 @@ static void __exit oprofile_exit(void)
 	oprofilefs_unregister();
 }
 
-MODULE_LICENSE("GPL");
+ 
 module_init(oprofile_init);
 module_exit(oprofile_exit);
+ 
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("John Levon <levon@movementarian.org>");
+MODULE_DESCRIPTION("OProfile system profiler");

drivers/oprofile/oprof.h

@@ -10,9 +10,6 @@
 #ifndef OPROF_H
 #define OPROF_H
 
-#include <linux/spinlock.h>
-#include <linux/oprofile.h>
- 
 int oprofile_setup(void);
 void oprofile_shutdown(void); 
 
@@ -22,6 +19,8 @@ void oprofilefs_unregister(void);
 int oprofile_start(void);
 void oprofile_stop(void);
 
+struct oprofile_operations;
+ 
 extern unsigned long fs_buffer_size;
 extern unsigned long fs_cpu_buffer_size;
 extern unsigned long fs_buffer_watershed;
@@ -29,6 +28,9 @@ extern enum oprofile_cpu oprofile_cpu_type;
 extern struct oprofile_operations * oprofile_ops;
 extern unsigned long oprofile_started;
  
+struct super_block;
+struct dentry;
+
 void oprofile_create_files(struct super_block * sb, struct dentry * root);
  
 #endif /* OPROF_H */

drivers/oprofile/oprofile_files.c

@@ -7,26 +7,18 @@
  * @author John Levon <levon@movementarian.org>
  */
 
-#include <linux/oprofile.h>
 #include <linux/fs.h>
-#include <linux/slab.h>
-#include <asm/uaccess.h>
+#include <linux/oprofile.h>
 
-#include "oprof.h"
 #include "event_buffer.h"
 #include "oprofile_stats.h"
+#include "oprof.h"
  
 unsigned long fs_buffer_size = 131072;
 unsigned long fs_cpu_buffer_size = 8192;
 unsigned long fs_buffer_watershed = 32768; /* FIXME: tune */
 
  
-static int simple_open(struct inode * inode, struct file * filp)
-{
-	return 0;
-}
-
-
 static ssize_t cpu_type_read(struct file * file, char * buf, size_t count, loff_t * offset)
 {
 	unsigned long cpu_type = oprofile_cpu_type;
@@ -36,7 +28,6 @@ static ssize_t cpu_type_read(struct file * file, char * buf, size_t count, loff_
  
  
 static struct file_operations cpu_type_fops = {
-	.open		= simple_open,
 	.read		= cpu_type_read,
 };
  
@@ -71,15 +62,26 @@ static ssize_t enable_write(struct file *file, char const * buf, size_t count, l
 
  
 static struct file_operations enable_fops = {
-	.open		= simple_open,
 	.read		= enable_read,
 	.write		= enable_write,
 };
 
 
+static ssize_t dump_write(struct file *file, char const * buf, size_t count, loff_t * offset)
+{
+	wake_up_buffer_waiter();
+	return count;
+}
+
+
+static struct file_operations dump_fops = {
+	.write		= dump_write,
+};
+ 
 void oprofile_create_files(struct super_block * sb, struct dentry * root)
 {
 	oprofilefs_create_file(sb, root, "enable", &enable_fops);
+	oprofilefs_create_file(sb, root, "dump", &dump_fops);
 	oprofilefs_create_file(sb, root, "buffer", &event_buffer_fops);
 	oprofilefs_create_ulong(sb, root, "buffer_size", &fs_buffer_size);
 	oprofilefs_create_ulong(sb, root, "buffer_watershed", &fs_buffer_watershed);

drivers/oprofile/oprofilefs.c

@@ -12,12 +12,9 @@
 
 #include <linux/init.h>
 #include <linux/module.h>
-#include <linux/pagemap.h>
-#include <linux/fs.h>
-#include <linux/dcache.h>
-#include <linux/file.h>
-#include <linux/namei.h>
 #include <linux/oprofile.h>
+#include <linux/fs.h>
+#include <linux/pagemap.h>
 #include <asm/uaccess.h>
 
 #include "oprof.h"

include/linux/oprofile.h

@@ -55,7 +55,7 @@ int oprofile_arch_init(struct oprofile_operations ** ops, enum oprofile_cpu * cp
  * Add a sample. This may be called from any context. Pass
  * smp_processor_id() as cpu.
  */
-extern void FASTCALL(oprofile_add_sample(unsigned long eip, unsigned long event, int cpu));
+extern void oprofile_add_sample(unsigned long eip, unsigned long event, int cpu);
 
 /**
  * Create a file of the given name as a child of the given root, with