* [cel:topic-sunrpc-thread-scheduling 76/77] net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:200:15: warning: variable 'count' set but not used
@ 2023-09-09 7:42 kernel test robot
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From: kernel test robot @ 2023-09-09 7:42 UTC (permalink / raw)
To: Chuck Lever; +Cc: llvm, oe-kbuild-all
tree: git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux topic-sunrpc-thread-scheduling
head: fecdd17a8cd2f8d356bfc4f42b8c06af2d0506da
commit: d0a489e1ee8c40fc0e984533dd4a2619bd5c3906 [76/77] svcrdma: Pre-allocate svc_rdma_recv_ctxt objects
config: hexagon-randconfig-r022-20230909 (https://download.01.org/0day-ci/archive/20230909/202309091510.lqtBu2f5-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230909/202309091510.lqtBu2f5-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309091510.lqtBu2f5-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:98:
In file included from include/rdma/ib_verbs.h:15:
In file included from include/linux/ethtool.h:18:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
547 | val = __raw_readb(PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
| ^
In file included from net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:98:
In file included from include/rdma/ib_verbs.h:15:
In file included from include/linux/ethtool.h:18:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
| ^
In file included from net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:98:
In file included from include/rdma/ib_verbs.h:15:
In file included from include/linux/ethtool.h:18:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
584 | __raw_writeb(value, PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
>> net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:200:15: warning: variable 'count' set but not used [-Wunused-but-set-variable]
200 | unsigned int count;
| ^
7 warnings generated.
vim +/count +200 net/sunrpc/xprtrdma/svc_rdma_recvfrom.c
190
191 /**
192 * svc_rdma_recv_ctxts_destroy - Release all recv_ctxt's for an xprt
193 * @rdma: svcxprt_rdma being torn down
194 *
195 */
196 void svc_rdma_recv_ctxts_destroy(struct svcxprt_rdma *rdma)
197 {
198 struct svc_rdma_recv_ctxt *ctxt;
199 struct llist_node *node;
> 200 unsigned int count;
201
202 count = 0;
203 while ((node = llist_del_first(&rdma->sc_recv_ctxts))) {
204 ctxt = llist_entry(node, struct svc_rdma_recv_ctxt, rc_node);
205 svc_rdma_recv_ctxt_destroy(rdma, ctxt);
206 ++count;
207 }
208 }
209
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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