linux-next: build failure after merge of the final tree (drm tree related)

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Hi all,

After merging the final tree, today's linux-next build (powerpc
allyesconfig) failed like this:

drivers/gpu/drm/radeon/ci_dpm.c: In function 'ci_request_link_speed_change_before_state_change':
drivers/gpu/drm/radeon/ci_dpm.c:4212:4: error: implicit declaration of function 'radeon_acpi_pcie_performance_request' [-Werror=implicit-function-declaration]
    if (radeon_acpi_pcie_performance_request(rdev, PCIE_PERF_REQ_PECI_GEN3, false) == 0)
    ^

Caused by commit cc8dbbb4f62a ("drm/radeon: add dpm support for CI dGPUs
(v2)").  These calls need protecting with CONFIG_ACPI (like is done in
cypress_dpm.c, I guess).

I tried reverting commit 9c725e5bcdae ("Merge branch 'drm-next-3.12' of
git://people.freedesktop.org/~agd5f/linux into drm-next") but that failed
because that branch is based on v3.11-rc7 (!) which is later than the
base of the drm tree (v3.11-rc3).  :-(

I added this fix up patch for today (it may be wrong, butfixes the build
failure).

From: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Date: Mon, 2 Sep 2013 18:57:41 +1000
Subject: [PATCH] drm/radeon: protect ACPI calls with CONFIG_ACPI

Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/radeon/ci_dpm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/radeon/ci_dpm.c b/drivers/gpu/drm/radeon/ci_dpm.c
index 916630f..3cce533 100644
--- a/drivers/gpu/drm/radeon/ci_dpm.c
+++ b/drivers/gpu/drm/radeon/ci_dpm.c
@@ -4208,6 +4208,7 @@ static void ci_request_link_speed_change_before_state_change(struct radeon_devic
 	pi->pspp_notify_required = false;
 	if (target_link_speed > current_link_speed) {
 		switch (target_link_speed) {
+#ifdef CONFIG_ACPI
 		case RADEON_PCIE_GEN3:
 			if (radeon_acpi_pcie_performance_request(rdev, PCIE_PERF_REQ_PECI_GEN3, false) == 0)
 				break;
@@ -4217,6 +4218,7 @@ static void ci_request_link_speed_change_before_state_change(struct radeon_devic
 		case RADEON_PCIE_GEN2:
 			if (radeon_acpi_pcie_performance_request(rdev, PCIE_PERF_REQ_PECI_GEN2, false) == 0)
 				break;
+#endif
 		default:
 			pi->force_pcie_gen = ci_get_current_pcie_speed(rdev);
 			break;
@@ -4248,7 +4250,9 @@ static void ci_notify_link_speed_change_after_state_change(struct radeon_device
 		    (ci_get_current_pcie_speed(rdev) > 0))
 			return;
 
+#ifdef CONFIG_ACPI
 		radeon_acpi_pcie_performance_request(rdev, request, false);
+#endif
 	}
 }
 
-- 
1.8.4.rc3

-- 
Cheers,
Stephen Rothwell                    sfr@xxxxxxxxxxxxxxxx

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