[PATCH 3.12 23/64] drm/radeon: cypress_dpm: Fix unused variable warning when CONFIG_ACPI=n

From: Alex Deucher <alexander.deucher@amd.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 936b32643cb03dcb34ef5dab81970229b1cc2a33 upstream.

With CONFIG_ACPI=n the following build warning is seen:

drivers/gpu/drm/radeon/cypress_dpm.c:302:31: warning: unused variable 'eg_pi' [-Wunused-variable]

Protect eg_pi with CONFIG_ACPI.

Based on patch from: Fabio Estevam [off-list ref]
but doesn't mix allocation and code.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Jiri Slaby <redacted>
---
 drivers/gpu/drm/radeon/cypress_dpm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/radeon/cypress_dpm.c b/drivers/gpu/drm/radeon/cypress_dpm.c
index 7143783fb237..b5a00771f27a 100644
--- a/drivers/gpu/drm/radeon/cypress_dpm.c
+++ b/drivers/gpu/drm/radeon/cypress_dpm.c

@@ -299,7 +299,9 @@ void cypress_program_response_times(struct radeon_device *rdev)
 static int cypress_pcie_performance_request(struct radeon_device *rdev,
 					    u8 perf_req, bool advertise)
 {
+#if defined(CONFIG_ACPI)
 	struct evergreen_power_info *eg_pi = evergreen_get_pi(rdev);
+#endif
 	u32 tmp;
 
 	udelay(10);

-- 
2.7.1