[PATCH] powerpc: Fix compile issue with force DAWR

[Michael Neuling <mikey@neuling.org>]

If you compile with KVM but without CONFIG_HAVE_HW_BREAKPOINT you fail
at linking with:
  arch/powerpc/kvm/book3s_hv_rmhandlers.o:(.text+0x708): undefined reference to `dawr_force_enable'

This was caused by this recent patch:
   commit c1fe190c06723322f2dfac31d3b982c581e434ef
   Author: Michael Neuling <mikey@neuling.org>
   powerpc: Add force enable of DAWR on P9 option

This builds dawr_force_enable in always via a new file.

Signed-off-by: Michael Neuling <mikey@neuling.org>
---
 arch/powerpc/kernel/Makefile        |  2 +-
 arch/powerpc/kernel/dawr.c          | 11 +++++++++++
 arch/powerpc/kernel/hw_breakpoint.c |  3 ---
 3 files changed, 12 insertions(+), 4 deletions(-)
 create mode 100644 arch/powerpc/kernel/dawr.c

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 0ea6c4aa3a..48a20ef5be 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -49,7 +49,7 @@ obj-y				:= cputable.o ptrace.o syscalls.o \
 				   signal.o sysfs.o cacheinfo.o time.o \
 				   prom.o traps.o setup-common.o \
 				   udbg.o misc.o io.o misc_$(BITS).o \
-				   of_platform.o prom_parse.o
+				   of_platform.o prom_parse.o dawr.o
 obj-$(CONFIG_PPC64)		+= setup_64.o sys_ppc32.o \
 				   signal_64.o ptrace32.o \
 				   paca.o nvram_64.o firmware.o
diff --git a/arch/powerpc/kernel/dawr.c b/arch/powerpc/kernel/dawr.c
new file mode 100644
index 0000000000..ca343efd23
--- /dev/null
+++ b/arch/powerpc/kernel/dawr.c
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// DAWR global variables
+//
+// Copyright 2019, Michael Neuling, IBM Corporation.
+
+#include <linux/types.h>
+#include <linux/export.h>
+
+bool dawr_force_enable;
+EXPORT_SYMBOL_GPL(dawr_force_enable);
diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c
index da307dd93e..78a17454f4 100644
--- a/arch/powerpc/kernel/hw_breakpoint.c
+++ b/arch/powerpc/kernel/hw_breakpoint.c
@@ -381,9 +381,6 @@ void hw_breakpoint_pmu_read(struct perf_event *bp)
 	/* TODO */
 }
 
-bool dawr_force_enable;
-EXPORT_SYMBOL_GPL(dawr_force_enable);
-
 static ssize_t dawr_write_file_bool(struct file *file,
 				    const char __user *user_buf,
 				    size_t count, loff_t *ppos)
-- 
2.21.0