Subject: linux-next: build failure after merge of the drm-misc tree

From: Stephen Rothwell <[email-masked]>
Date: Tue, 2 Apr 2019 10:50:06 +1100

Hi all,

After merging the drm-misc tree, today's linux-next build (x86_64
allmodconfig) failed like this:

In file included from include/linux/kernel.h:7,
                 from include/asm-generic/bug.h:18,
                 from arch/x86/include/asm/bug.h:83,
                 from include/linux/bug.h:5,
                 from include/linux/mmdebug.h:5,
                 from include/linux/gfp.h:5,
                 from include/linux/slab.h:15,
                 from drivers/gpu/drm/lima/lima_ctx.c:4:
drivers/gpu/drm/lima/lima_ctx.c: In function 'lima_ctx_create':
include/linux/limits.h:13:18: warning: passing argument 3 of 'xa_alloc' makes pointer from integer without a cast [-Wint-conversion]
 #define UINT_MAX (~0U)
                  ^~~~~
drivers/gpu/drm/lima/lima_ctx.c:26:36: note: in expansion of macro 'UINT_MAX'
  err = xa_alloc(&mgr->handles, id, UINT_MAX, ctx, GFP_KERNEL);
                                    ^~~~~~~~
In file included from include/linux/radix-tree.h:31,
                 from include/linux/idr.h:15,
                 from include/drm/drm_device.h:7,
                 from drivers/gpu/drm/lima/lima_device.h:7,
                 from drivers/gpu/drm/lima/lima_ctx.c:6:
include/linux/xarray.h:817:9: note: expected 'void *' but argument is of type 'unsigned int'
   void *entry, struct xa_limit limit, gfp_t gfp)
   ~~~~~~^~~~~
drivers/gpu/drm/lima/lima_ctx.c:26:46: error: incompatible type for argument 4 of 'xa_alloc'
  err = xa_alloc(&mgr->handles, id, UINT_MAX, ctx, GFP_KERNEL);
                                              ^~~
In file included from include/linux/radix-tree.h:31,
                 from include/linux/idr.h:15,
                 from include/drm/drm_device.h:7,
                 from drivers/gpu/drm/lima/lima_device.h:7,
                 from drivers/gpu/drm/lima/lima_ctx.c:6:
include/linux/xarray.h:817:32: note: expected 'struct xa_limit' but argument is of type 'struct lima_ctx *'
   void *entry, struct xa_limit limit, gfp_t gfp)
                ~~~~~~~~~~~~~~~~^~~~~

Caused by commit

  a1d2a6339961 ("drm/lima: driver for ARM Mali4xx GPUs")

interacting with commit

  a3e4d3f97ec8 ("XArray: Redesign xa_alloc API")

from Linus' tree (v5.1-rc1).

I have applied the following patch for today.  It could be applied as
part of a merge of v5.1-rc1 into drm-misc.

From: Stephen Rothwell <[email-masked]>
Date: Tue, 2 Apr 2019 10:45:32 +1100
Subject: [PATCH] drm/lima: update for xa_alloc API change

Signed-off-by: Stephen Rothwell <[email-masked]>
---
 drivers/gpu/drm/lima/lima_ctx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/lima/lima_ctx.c b/drivers/gpu/drm/lima/lima_ctx.c
index c8d12f7c6894..bafa00d74cc5 100644
--- a/drivers/gpu/drm/lima/lima_ctx.c
+++ b/drivers/gpu/drm/lima/lima_ctx.c
@@ -23,7 +23,7 @@ int lima_ctx_create(struct lima_device *dev, struct lima_ctx_mgr *mgr, u32 *id)
 			goto err_out0;
 	}
 
-	err = xa_alloc(&mgr->handles, id, UINT_MAX, ctx, GFP_KERNEL);
+	err = xa_alloc(&mgr->handles, id, ctx, XA_LIMIT(*id, UINT_MAX), GFP_KERNEL);
 	if (err < 0)
 		goto err_out0;
 
-- 
2.20.1

-- 
Cheers,
Stephen Rothwell
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