OProfile: Rework oprofile_add_ibs_sample() function

Code looks much more cleaner now.

Signed-off-by: Robert Richter <robert.richter@amd.com>

diff --git a/arch/x86/oprofile/op_model_amd.c b/arch/x86/oprofile/op_model_amd.c
index d9faf60..54632e0 100644 (file)
--- a/arch/x86/oprofile/op_model_amd.c
+++ b/arch/x86/oprofile/op_model_amd.c
@@ -67,8 +67,9 @@ static unsigned long reset_value[NUM_COUNTERS];
 
 /* The function interface needs to be fixed, something like add
    data. Should then be added to linux/oprofile.h. */
-extern void oprofile_add_ibs_sample(struct pt_regs *const regs,
-                                   unsigned int * const ibs_sample, u8 code);
+extern void
+oprofile_add_ibs_sample(struct pt_regs *const regs,
+                       unsigned int * const ibs_sample, int ibs_code);
 
 struct ibs_fetch_sample {
        /* MSRC001_1031 IBS Fetch Linear Address Register */

diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
index e1bd5a9..d6c6827 100644 (file)
--- a/drivers/oprofile/cpu_buffer.c
+++ b/drivers/oprofile/cpu_buffer.c
@@ -257,21 +257,23 @@ void oprofile_add_sample(struct pt_regs * const regs, unsigned long event)
 
 #ifdef CONFIG_OPROFILE_IBS
 
-#define MAX_IBS_SAMPLE_SIZE    14
-static int log_ibs_sample(struct oprofile_cpu_buffer *cpu_buf,
-       unsigned long pc, int is_kernel, unsigned  int *ibs, int ibs_code)
+#define MAX_IBS_SAMPLE_SIZE 14
+
+void oprofile_add_ibs_sample(struct pt_regs *const regs,
+                            unsigned int * const ibs_sample, int ibs_code)
 {
+       int is_kernel = !user_mode(regs);
+       struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(cpu_buffer);
        struct task_struct *task;
 
        cpu_buf->sample_received++;
 
        if (nr_available_slots(cpu_buf) < MAX_IBS_SAMPLE_SIZE) {
+               /* we can't backtrace since we lost the source of this event */
                cpu_buf->sample_lost_overflow++;
-               return 0;
+               return;
        }
 
-       is_kernel = !!is_kernel;
-
        /* notice a switch from user->kernel or vice versa */
        if (cpu_buf->last_is_kernel != is_kernel) {
                cpu_buf->last_is_kernel = is_kernel;
@@ -281,7 +283,6 @@ static int log_ibs_sample(struct oprofile_cpu_buffer *cpu_buf,
        /* notice a task switch */
        if (!is_kernel) {
                task = current;
-
                if (cpu_buf->last_task != task) {
                        cpu_buf->last_task = task;
                        add_code(cpu_buf, (unsigned long)task);
@@ -289,36 +290,17 @@ static int log_ibs_sample(struct oprofile_cpu_buffer *cpu_buf,
        }
 
        add_code(cpu_buf, ibs_code);
-       add_sample(cpu_buf, ibs[0], ibs[1]);
-       add_sample(cpu_buf, ibs[2], ibs[3]);
-       add_sample(cpu_buf, ibs[4], ibs[5]);
+       add_sample(cpu_buf, ibs_sample[0], ibs_sample[1]);
+       add_sample(cpu_buf, ibs_sample[2], ibs_sample[3]);
+       add_sample(cpu_buf, ibs_sample[4], ibs_sample[5]);
 
        if (ibs_code == IBS_OP_BEGIN) {
-       add_sample(cpu_buf, ibs[6], ibs[7]);
-       add_sample(cpu_buf, ibs[8], ibs[9]);
-       add_sample(cpu_buf, ibs[10], ibs[11]);
-       }
-
-       return 1;
-}
-
-void oprofile_add_ibs_sample(struct pt_regs *const regs,
-                               unsigned int * const ibs_sample, u8 code)
-{
-       int is_kernel = !user_mode(regs);
-       unsigned long pc = profile_pc(regs);
-
-       struct oprofile_cpu_buffer *cpu_buf =
-                        &per_cpu(cpu_buffer, smp_processor_id());
-
-       if (!backtrace_depth) {
-               log_ibs_sample(cpu_buf, pc, is_kernel, ibs_sample, code);
-               return;
+               add_sample(cpu_buf, ibs_sample[6], ibs_sample[7]);
+               add_sample(cpu_buf, ibs_sample[8], ibs_sample[9]);
+               add_sample(cpu_buf, ibs_sample[10], ibs_sample[11]);
        }
 
-       /* if log_sample() fails we can't backtrace since we lost the source
-       * of this event */
-       if (log_ibs_sample(cpu_buf, pc, is_kernel, ibs_sample, code))
+       if (backtrace_depth)
                oprofile_ops.backtrace(regs, backtrace_depth);
 }