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From:   Arnd Bergmann <arnd@arndb.de>
To:     Gustavo Padovan <gustavo@padovan.org>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Sean Paul <seanpaul@chromium.org>,
        David Airlie <airlied@linux.ie>
Cc:     Arnd Bergmann <arnd@arndb.de>,
        Alex Deucher <alexander.deucher@amd.com>,
        Monk Liu <monk.liu@amd.com>,
        =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>,
        =?UTF-8?q?Michel=20D=C3=A4nzer?= <michel.daenzer@amd.com>,
        Chunming Zhou <david1.zhou@amd.com>,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH] drm: fix drm_get_max_iomem type mismatch
Date:   Thu, 22 Feb 2018 12:47:51 +0100
Message-Id: <20180222114804.1394300-1-arnd@arndb.de>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

When comparing two variables with min()/max(), they should be the same type:

drivers/gpu/drm/drm_memory.c: In function 'drm_get_max_iomem':
include/linux/kernel.h:821:16: error: comparison of distinct pointer types lacks a cast [-Werror]
  (void) (&max1 == &max2);

This makes the local variable in drm_get_max_iomem make the type
from resource->end.

Fixes: 82626363a217 ("drm: add func to get max iomem address v2")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/gpu/drm/drm_memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_memory.c b/drivers/gpu/drm/drm_memory.c
index 7ca500b8c399..3c54044214db 100644
--- a/drivers/gpu/drm/drm_memory.c
+++ b/drivers/gpu/drm/drm_memory.c
@@ -153,7 +153,7 @@ EXPORT_SYMBOL(drm_legacy_ioremapfree);
 u64 drm_get_max_iomem(void)
 {
 	struct resource *tmp;
-	u64 max_iomem = 0;
+	resource_size_t max_iomem = 0;
 
 	for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) {
 		max_iomem = max(max_iomem,  tmp->end);
-- 
2.9.0