oprofile: change cpu_buffer from array to per_cpu variable

Change cpu_buffer from array to per_cpu variable in oprofile functions.

[akpm@linux-foundation.org: coding-style fixes]
Cc: Philippe Elie <phil.el@wanadoo.fr>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 8 deletions

diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
index c93d3d2640ab..efcbf4b4579f 100644
--- a/drivers/oprofile/cpu_buffer.c
+++ b/drivers/oprofile/cpu_buffer.c
@@ -27,7 +27,7 @@
 #include "buffer_sync.h"
 #include "oprof.h"
 
-struct oprofile_cpu_buffer cpu_buffer[NR_CPUS] __cacheline_aligned;
+DEFINE_PER_CPU_SHARED_ALIGNED(struct oprofile_cpu_buffer, cpu_buffer);
 
 static void wq_sync_buffer(struct work_struct *work);
 
@@ -39,7 +39,7 @@ void free_cpu_buffers(void)
         int i;
  
         for_each_online_cpu(i)
-                vfree(cpu_buffer[i].buffer);
+                vfree(per_cpu(cpu_buffer, i).buffer);
 }
 
 int alloc_cpu_buffers(void)
@@ -49,7 +49,7 @@ int alloc_cpu_buffers(void)
         unsigned long buffer_size = fs_cpu_buffer_size;
  
         for_each_online_cpu(i) {
-                struct oprofile_cpu_buffer * b = &cpu_buffer[i];
+                struct oprofile_cpu_buffer *b = &per_cpu(cpu_buffer, i);
  
                 b->buffer = vmalloc_node(sizeof(struct op_sample) * buffer_size,
                         cpu_to_node(i));
@@ -83,7 +83,7 @@ void start_cpu_work(void)
         work_enabled = 1;
 
         for_each_online_cpu(i) {
-                struct oprofile_cpu_buffer * b = &cpu_buffer[i];
+                struct oprofile_cpu_buffer *b = &per_cpu(cpu_buffer, i);
 
                 /*
                  * Spread the work by 1 jiffy per cpu so they dont all
@@ -100,7 +100,7 @@ void end_cpu_work(void)
         work_enabled = 0;
 
         for_each_online_cpu(i) {
-                struct oprofile_cpu_buffer * b = &cpu_buffer[i];
+                struct oprofile_cpu_buffer *b = &per_cpu(cpu_buffer, i);
 
                 cancel_delayed_work(&b->work);
         }
@@ -227,7 +227,7 @@ static void oprofile_end_trace(struct oprofile_cpu_buffer * cpu_buf)
 void oprofile_add_ext_sample(unsigned long pc, struct pt_regs * const regs,
                                 unsigned long event, int is_kernel)
 {
-        struct oprofile_cpu_buffer * cpu_buf = &cpu_buffer[smp_processor_id()];
+        struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(cpu_buffer);
 
         if (!backtrace_depth) {
                 log_sample(cpu_buf, pc, is_kernel, event);
@@ -254,13 +254,13 @@ void oprofile_add_sample(struct pt_regs * const regs, unsigned long event)
 
 void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event)
 {
-        struct oprofile_cpu_buffer * cpu_buf = &cpu_buffer[smp_processor_id()];
+        struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(cpu_buffer);
         log_sample(cpu_buf, pc, is_kernel, event);
 }
 
 void oprofile_add_trace(unsigned long pc)
 {
-        struct oprofile_cpu_buffer * cpu_buf = &cpu_buffer[smp_processor_id()];
+        struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(cpu_buffer);
 
         if (!cpu_buf->tracing)
                 return;