Hi all, After merging the xarray tree, today's linux-next build (powerpc ppc64_defconfig) failed like this: In file included from include/linux/uio.h:12, from include/linux/socket.h:8, from include/rdma/rdma_cm.h:37, from drivers/infiniband/core/restrack.c:6: drivers/infiniband/core/restrack.c: In function 'rt_xa_alloc_cyclic': include/linux/kernel.h:40:18: warning: passing argument 3 of '__xa_alloc' makes pointer from integer without a cast [-Wint-conversion] #define U32_MAX ((u32)~0U) ^~~~~~~~~~ drivers/infiniband/core/restrack.c:26:27: note: in expansion of macro 'U32_MAX' err = __xa_alloc(xa, id, U32_MAX, entry, GFP_KERNEL); ^~~~~~~ In file included from include/linux/radix-tree.h:31, from include/linux/fs.h:15, from include/linux/seq_file.h:11, from arch/powerpc/include/asm/machdep.h:12, from arch/powerpc/include/asm/archrandom.h:7, from include/linux/random.h:166, from include/linux/net.h:22, from include/linux/skbuff.h:29, from include/linux/if_arp.h:26, from include/rdma/ib_addr.h:39, from include/rdma/rdma_cm.h:39, from drivers/infiniband/core/restrack.c:6: include/linux/xarray.h:524:61: note: expected 'void *' but argument is of type 'unsigned int' int __must_check __xa_alloc(struct xarray *, u32 *id, void *entry, ~~~~~~^~~~~ drivers/infiniband/core/restrack.c:26:36: error: incompatible type for argument 4 of '__xa_alloc' err = __xa_alloc(xa, id, U32_MAX, entry, GFP_KERNEL); ^~~~~ In file included from include/linux/radix-tree.h:31, from include/linux/fs.h:15, from include/linux/seq_file.h:11, from arch/powerpc/include/asm/machdep.h:12, from arch/powerpc/include/asm/archrandom.h:7, from include/linux/random.h:166, from include/linux/net.h:22, from include/linux/skbuff.h:29, from include/linux/if_arp.h:26, from include/rdma/ib_addr.h:39, from include/rdma/rdma_cm.h:39, from drivers/infiniband/core/restrack.c:6: include/linux/xarray.h:525:3: note: expected 'struct xa_limit' but argument is of type 'void *' struct xa_limit, gfp_t); ^~~~~~~~~~~~~~~ drivers/infiniband/core/restrack.c:29:28: warning: passing argument 3 of '__xa_alloc' makes pointer from integer without a cast [-Wint-conversion] err = __xa_alloc(xa, id, *next, entry, GFP_KERNEL); ^~~~~ In file included from include/linux/radix-tree.h:31, from include/linux/fs.h:15, from include/linux/seq_file.h:11, from arch/powerpc/include/asm/machdep.h:12, from arch/powerpc/include/asm/archrandom.h:7, from include/linux/random.h:166, from include/linux/net.h:22, from include/linux/skbuff.h:29, from include/linux/if_arp.h:26, from include/rdma/ib_addr.h:39, from include/rdma/rdma_cm.h:39, from drivers/infiniband/core/restrack.c:6: include/linux/xarray.h:524:61: note: expected 'void *' but argument is of type 'u32' {aka 'unsigned int'} int __must_check __xa_alloc(struct xarray *, u32 *id, void *entry, ~~~~~~^~~~~ drivers/infiniband/core/restrack.c:29:35: error: incompatible type for argument 4 of '__xa_alloc' err = __xa_alloc(xa, id, *next, entry, GFP_KERNEL); ^~~~~ In file included from include/linux/radix-tree.h:31, from include/linux/fs.h:15, from include/linux/seq_file.h:11, from arch/powerpc/include/asm/machdep.h:12, from arch/powerpc/include/asm/archrandom.h:7, from include/linux/random.h:166, from include/linux/net.h:22, from include/linux/skbuff.h:29, from include/linux/if_arp.h:26, from include/rdma/ib_addr.h:39, from include/rdma/rdma_cm.h:39, from drivers/infiniband/core/restrack.c:6: include/linux/xarray.h:525:3: note: expected 'struct xa_limit' but argument is of type 'void *' struct xa_limit, gfp_t); ^~~~~~~~~~~~~~~ Caused by commit fd47c2f99f04 ("RDMA/restrack: Convert internal DB from hash to XArray") from the rdma tree interacting with commit a3e4d3f97ec8 ("XArray: Redesign xa_alloc API") from the xarray tree. I added the following merge fix patch: From: Stephen Rothwell Date: Thu, 21 Feb 2019 17:07:22 +1100 Subject: [PATCH] RDMA/restrack: fix for __xa_alloc() API change Signed-off-by: Stephen Rothwell --- drivers/infiniband/core/restrack.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/core/restrack.c b/drivers/infiniband/core/restrack.c index fa804093fafb..5cb381a986c1 100644 --- a/drivers/infiniband/core/restrack.c +++ b/drivers/infiniband/core/restrack.c @@ -23,10 +23,10 @@ static int rt_xa_alloc_cyclic(struct xarray *xa, u32 *id, void *entry, *id = 0; xa_lock(xa); - err = __xa_alloc(xa, id, U32_MAX, entry, GFP_KERNEL); + err = __xa_alloc(xa, id, entry, XA_LIMIT(*id, U32_MAX), GFP_KERNEL); if (err && *next != U32_MAX) { *id = 0; - err = __xa_alloc(xa, id, *next, entry, GFP_KERNEL); + err = __xa_alloc(xa, id, entry, XA_LIMIT(0, *next), GFP_KERNEL); } if (!err) -- 2.20.1 -- Cheers, Stephen Rothwell