[CELL] oprofile: add support to OProfile for profiling CELL BE SPUs

From: Maynard Johnson <mpjohn@us.ibm.com>

This patch updates the existing arch/powerpc/oprofile/op_model_cell.c
to add in the SPU profiling capabilities.  In addition, a 'cell' subdirectory
was added to arch/powerpc/oprofile to hold Cell-specific SPU profiling code.
Exports spu_set_profile_private_kref and spu_get_profile_private_kref which
are used by OProfile to store private profile information in spufs data
structures.

Also incorporated several fixes from other patches (rrn).  Check pointer
returned from kzalloc.  Eliminated unnecessary cast.  Better error
handling and cleanup in the related area.  64-bit unsigned long parameter
was being demoted to 32-bit unsigned int and eventually promoted back to
unsigned long.

Signed-off-by: Carl Love <carll@us.ibm.com>
Signed-off-by: Maynard Johnson <mpjohn@us.ibm.com>
Signed-off-by: Bob Nelson <rrnelson@us.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>

1 files changed, 8 insertions, 3 deletions

diff --git a/arch/powerpc/oprofile/op_model_power4.c b/arch/powerpc/oprofile/op_model_power4.c
index a7c206b665af..cddc250a6a5c 100644
--- a/arch/powerpc/oprofile/op_model_power4.c
+++ b/arch/powerpc/oprofile/op_model_power4.c
@@ -32,7 +32,7 @@ static u32 mmcr0_val;
 static u64 mmcr1_val;
 static u64 mmcra_val;
 
-static void power4_reg_setup(struct op_counter_config *ctr,
+static int power4_reg_setup(struct op_counter_config *ctr,
                              struct op_system_config *sys,
                              int num_ctrs)
 {
@@ -60,6 +60,8 @@ static void power4_reg_setup(struct op_counter_config *ctr,
                 mmcr0_val &= ~MMCR0_PROBLEM_DISABLE;
         else
                 mmcr0_val |= MMCR0_PROBLEM_DISABLE;
+
+        return 0;
 }
 
 extern void ppc64_enable_pmcs(void);
@@ -84,7 +86,7 @@ static inline int mmcra_must_set_sample(void)
         return 0;
 }
 
-static void power4_cpu_setup(struct op_counter_config *ctr)
+static int power4_cpu_setup(struct op_counter_config *ctr)
 {
         unsigned int mmcr0 = mmcr0_val;
         unsigned long mmcra = mmcra_val;
@@ -111,9 +113,11 @@ static void power4_cpu_setup(struct op_counter_config *ctr)
             mfspr(SPRN_MMCR1));
         dbg("setup on cpu %d, mmcra %lx\n", smp_processor_id(),
             mfspr(SPRN_MMCRA));
+
+        return 0;
 }
 
-static void power4_start(struct op_counter_config *ctr)
+static int power4_start(struct op_counter_config *ctr)
 {
         int i;
         unsigned int mmcr0;
@@ -148,6 +152,7 @@ static void power4_start(struct op_counter_config *ctr)
         oprofile_running = 1;
 
         dbg("start on cpu %d, mmcr0 %x\n", smp_processor_id(), mmcr0);
+        return 0;
 }
 
 static void power4_stop(void)