Subject: [PATCH] powerpc/cputable: fix oprofile_cpu_type on power8

From: Nishanth Aravamudan <[email-masked]>
Date: Tue, 28 May 2013 13:39:50 -0700

Maynard informed me that neither the oprofile kernel module nor oprofile
userspace has been updated to support that "legacy" oprofile module
interface for power8, which is indicated by "ppc64/power8." This results
in no samples. The solution is to default to the "timer" type, instead.
The raw entry also should be updated, as "ppc64/ibm-compat-v1" indicates
to oprofile userspace to use "compatibility events" which are obsolete
in ISA 2.07.

Signed-off-by: Nishanth Aravamudan <[email-masked]>

---
Ben, if this seems reasonable to you, it would be great to get this into
3.10.

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index c60bbec..b8808bc 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -453,7 +453,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.oprofile_type		= PPC_OPROFILE_POWER4,
-		.oprofile_cpu_type	= "ppc64/ibm-compat-v1",
+		.oprofile_cpu_type	= 0,
 		.cpu_setup		= __setup_cpu_power8,
 		.cpu_restore		= __restore_cpu_power8,
 		.platform		= "power8",
@@ -506,7 +506,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.dcache_bsize		= 128,
 		.num_pmcs		= 6,
 		.pmc_type		= PPC_PMC_IBM,
-		.oprofile_cpu_type	= "ppc64/power8",
+		.oprofile_cpu_type	= 0,
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.cpu_setup		= __setup_cpu_power8,
 		.cpu_restore		= __restore_cpu_power8,