[PATCH] ppc32: fix build with oprofile

[Benjamin Herrenschmidt]

Current -git tree doesn't build when enabling oprofile on a non-bookE
CPU (like on a PowerMac for example). While there is no performance
counter support for these CPUs implemented yet, it's still nice to be
able to use the timer based sampling, and that got broken.

Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>

Index: linux-work/arch/ppc/kernel/Makefile
===================================================================
--- linux-work.orig/arch/ppc/kernel/Makefile	2005-09-22 15:44:03.000000000 +1000
+++ linux-work/arch/ppc/kernel/Makefile	2005-09-22 15:51:17.000000000 +1000
@@ -15,9 +15,8 @@
 obj-y				:= entry.o traps.o irq.o idle.o time.o misc.o \
 					process.o signal.o ptrace.o align.o \
 					semaphore.o syscalls.o setup.o \
-					cputable.o ppc_htab.o
+					cputable.o ppc_htab.o perfmon.o
 obj-$(CONFIG_6xx)		+= l2cr.o cpu_setup_6xx.o
-obj-$(CONFIG_E500)		+= perfmon.o
 obj-$(CONFIG_SOFTWARE_SUSPEND)	+= swsusp.o
 obj-$(CONFIG_POWER4)		+= cpu_setup_power4.o
 obj-$(CONFIG_MODULES)		+= module.o ppc_ksyms.o
Index: linux-work/arch/ppc/kernel/perfmon.c
===================================================================
--- linux-work.orig/arch/ppc/kernel/perfmon.c	2005-09-22 14:06:18.000000000 +1000
+++ linux-work/arch/ppc/kernel/perfmon.c	2005-09-22 15:51:49.000000000 +1000
@@ -45,7 +45,7 @@
 	mtpmr(PMRN_PMGC0, pmgc0);
 }
 
-#else
+#elif CONFIG_6xx
 /* Ensure exceptions are disabled */
 
 static void dummy_perf(struct pt_regs *regs)
@@ -55,6 +55,10 @@
 	mmcr0 &= ~MMCR0_PMXE;
 	mtspr(SPRN_MMCR0, mmcr0);
 }
+#else
+static void dummy_perf(struct pt_regs *regs)
+{
+}
 #endif
 
 void (*perf_irq)(struct pt_regs *) = dummy_perf;