[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_fsl_booke.c b/arch/powerpc/oprofile/op_model_fsl_booke.c
index 2267eb8c661b..183a28bb1812 100644
--- a/arch/powerpc/oprofile/op_model_fsl_booke.c
+++ b/arch/powerpc/oprofile/op_model_fsl_booke.c
@@ -244,7 +244,7 @@ static void dump_pmcs(void)
                         mfpmr(PMRN_PMLCA3), mfpmr(PMRN_PMLCB3));
 }
 
-static void fsl_booke_cpu_setup(struct op_counter_config *ctr)
+static int fsl_booke_cpu_setup(struct op_counter_config *ctr)
 {
         int i;
 
@@ -258,9 +258,11 @@ static void fsl_booke_cpu_setup(struct op_counter_config *ctr)
 
                 set_pmc_user_kernel(i, ctr[i].user, ctr[i].kernel);
         }
+
+        return 0;
 }
 
-static void fsl_booke_reg_setup(struct op_counter_config *ctr,
+static int fsl_booke_reg_setup(struct op_counter_config *ctr,
                              struct op_system_config *sys,
                              int num_ctrs)
 {
@@ -276,9 +278,10 @@ static void fsl_booke_reg_setup(struct op_counter_config *ctr,
         for (i = 0; i < num_counters; ++i)
                 reset_value[i] = 0x80000000UL - ctr[i].count;
 
+        return 0;
 }
 
-static void fsl_booke_start(struct op_counter_config *ctr)
+static int fsl_booke_start(struct op_counter_config *ctr)
 {
         int i;
 
@@ -308,6 +311,8 @@ static void fsl_booke_start(struct op_counter_config *ctr)
 
         pr_debug("start on cpu %d, pmgc0 %x\n", smp_processor_id(),
                         mfpmr(PMRN_PMGC0));
+
+        return 0;
 }
 
 static void fsl_booke_stop(void)