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Date: Wed, 13 Mar 2024 06:31:52 +0800
From: kernel test robot <lkp@intel.com>
To: Randy Dunlap <rdunlap@infradead.org>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
	Johannes Berg <johannes@sipsolutions.net>,
	Kalle Valo <kvalo@kernel.org>, linux-wireless@vger.kernel.org
Subject: [wireless-next:main 6/6] drivers/ssb/main.c:1149:2: warning: label
 at end of compound statement is a C23 extension
Message-ID: <202403130633.muvbu9ev-lkp@intel.com>
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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless-next.git main
head:   e27b02e23a701e5761f1d6028643e1203a1c56de
commit: e27b02e23a701e5761f1d6028643e1203a1c56de [6/6] ssb: drop use of non-existing CONFIG_SSB_DEBUG symbol
config: hexagon-allyesconfig (https://download.01.org/0day-ci/archive/20240313/202403130633.muvbu9ev-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 503c55e17037436dcd45ac69dea8967e67e3f5e8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240313/202403130633.muvbu9ev-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/202403130633.muvbu9ev-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/ssb/main.c:11:
   In file included from drivers/ssb/ssb_private.h:8:
   In file included from include/linux/ssb/ssb.h:9:
   In file included from include/linux/pci.h:38:
   In file included from include/linux/interrupt.h:11:
   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:328:
   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 drivers/ssb/main.c:11:
   In file included from drivers/ssb/ssb_private.h:8:
   In file included from include/linux/ssb/ssb.h:9:
   In file included from include/linux/pci.h:38:
   In file included from include/linux/interrupt.h:11:
   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:328:
   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 drivers/ssb/main.c:11:
   In file included from drivers/ssb/ssb_private.h:8:
   In file included from include/linux/ssb/ssb.h:9:
   In file included from include/linux/pci.h:38:
   In file included from include/linux/interrupt.h:11:
   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:328:
   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);
         |                                                       ~~~~~~~~~~ ^
   In file included from drivers/ssb/main.c:11:
   In file included from drivers/ssb/ssb_private.h:8:
   In file included from include/linux/ssb/ssb.h:9:
   In file included from include/linux/pci.h:2688:
   In file included from include/linux/dma-mapping.h:11:
   In file included from include/linux/scatterlist.h:8:
   In file included from include/linux/mm.h:2188:
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> drivers/ssb/main.c:1149:2: warning: label at end of compound statement is a C23 extension [-Wc23-extensions]
    1149 |         }
         |         ^
   8 warnings generated.


vim +1149 drivers/ssb/main.c

04023afcce2eaf Rafał Miłecki  2011-08-14  1132  
61e115a56d1aaf Michael Buesch 2007-09-18  1133  u32 ssb_dma_translation(struct ssb_device *dev)
61e115a56d1aaf Michael Buesch 2007-09-18  1134  {
61e115a56d1aaf Michael Buesch 2007-09-18  1135  	switch (dev->bus->bustype) {
61e115a56d1aaf Michael Buesch 2007-09-18  1136  	case SSB_BUSTYPE_SSB:
61e115a56d1aaf Michael Buesch 2007-09-18  1137  		return 0;
61e115a56d1aaf Michael Buesch 2007-09-18  1138  	case SSB_BUSTYPE_PCI:
04023afcce2eaf Rafał Miłecki  2011-08-14  1139  		if (pci_is_pcie(dev->bus->host_pci) &&
04023afcce2eaf Rafał Miłecki  2011-08-14  1140  		    ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64) {
04023afcce2eaf Rafał Miłecki  2011-08-14  1141  			return SSB_PCIE_DMA_H32;
04023afcce2eaf Rafał Miłecki  2011-08-14  1142  		} else {
04023afcce2eaf Rafał Miłecki  2011-08-14  1143  			if (ssb_dma_translation_special_bit(dev))
a9770a815d280d Rafał Miłecki  2011-07-20  1144  				return SSB_PCIE_DMA_H32;
a9770a815d280d Rafał Miłecki  2011-07-20  1145  			else
61e115a56d1aaf Michael Buesch 2007-09-18  1146  				return SSB_PCI_DMA;
04023afcce2eaf Rafał Miłecki  2011-08-14  1147  		}
f225763a7d6c92 Michael Buesch 2008-06-20  1148  	default:
61e115a56d1aaf Michael Buesch 2007-09-18 @1149  	}
61e115a56d1aaf Michael Buesch 2007-09-18  1150  	return 0;
61e115a56d1aaf Michael Buesch 2007-09-18  1151  }
61e115a56d1aaf Michael Buesch 2007-09-18  1152  EXPORT_SYMBOL(ssb_dma_translation);
61e115a56d1aaf Michael Buesch 2007-09-18  1153  

:::::: The code at line 1149 was first introduced by commit
:::::: 61e115a56d1aafd6e6a8a9fee8ac099a6128ac7b [SSB]: add Sonics Silicon Backplane bus support

:::::: TO: Michael Buesch <mb@bu3sch.de>
:::::: CC: David S. Miller <davem@sunset.davemloft.net>

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