linux-kernel - [gustavoars:testing/wfamnae-next20240710-cbc 1/13] arch/powerpc/include/asm/hvcall.h:697:48: error: structure containing a flexible array member is not at the end of another structure

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Message-ID: <ZpCuVKUPjur+Lr9B@rli9-mobl>
Date: Fri, 12 Jul 2024 12:17:24 +0800
From: kernel test robot <lkp@...el.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
CC: <oe-kbuild-all@...ts.linux.dev>, "Gustavo A. R. Silva"
	<gustavo@...eddedor.com>, LKML <linux-kernel@...r.kernel.org>
Subject: [gustavoars:testing/wfamnae-next20240710-cbc 1/13]
 arch/powerpc/include/asm/hvcall.h:697:48: error: structure containing a
 flexible array member is not at the end of another structure

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git testing/wfamnae-next20240710-cbc
head:   811bc7260e24cf06adefdbf8debb2a83d213e02d
commit: d692eacf807861f523e66bd7d1c60f5dc254f4c6 [1/13] Makefile: Enable -Wflex-array-member-not-at-end globally
:::::: branch date: 2 hours ago
:::::: commit date: 15 hours ago
config: powerpc64-randconfig-001-20240711 (https://download.01.org/0day-ci/archive/20240712/202407120418.bob8U4Yb-lkp@intel.com/config)
compiler: powerpc64-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240712/202407120418.bob8U4Yb-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@...el.com>
| Closes: https://lore.kernel.org/r/202407120418.bob8U4Yb-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/powerpc/include/asm/book3s/64/tlbflush-radix.h:5,
                    from arch/powerpc/include/asm/book3s/64/radix.h:18,
                    from arch/powerpc/include/asm/book3s/64/pgtable.h:298,
                    from arch/powerpc/include/asm/book3s/64/mmu-hash.h:20,
                    from arch/powerpc/include/asm/book3s/64/mmu.h:32,
                    from arch/powerpc/include/asm/mmu.h:378,
                    from arch/powerpc/include/asm/paca.h:18,
                    from arch/powerpc/include/asm/current.h:13,
                    from include/linux/thread_info.h:23,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/powerpc/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:79,
                    from include/linux/spinlock.h:56,
                    from include/linux/mmzone.h:8,
                    from include/linux/gfp.h:7,
                    from include/linux/umh.h:4,
                    from include/linux/kmod.h:9,
                    from include/linux/module.h:17,
                    from lib/test_bitops.c:10:
>> arch/powerpc/include/asm/hvcall.h:697:48: error: structure containing a flexible array member is not at the end of another structure [-Werror=flex-array-member-not-at-end]
     697 |         struct hv_get_perf_counter_info_params params;
         |                                                ^~~~~~
   cc1: all warnings being treated as errors


vim +697 arch/powerpc/include/asm/hvcall.h

59562b5c33d6ff Scott Cheloha 2020-07-27  691  
59562b5c33d6ff Scott Cheloha 2020-07-27  692  #define HGPCI_REQ_BUFFER_SIZE	4096
59562b5c33d6ff Scott Cheloha 2020-07-27  693  #define HGPCI_MAX_DATA_BYTES \
59562b5c33d6ff Scott Cheloha 2020-07-27  694  	(HGPCI_REQ_BUFFER_SIZE - sizeof(struct hv_get_perf_counter_info_params))
59562b5c33d6ff Scott Cheloha 2020-07-27  695  
59562b5c33d6ff Scott Cheloha 2020-07-27  696  struct hv_gpci_request_buffer {
59562b5c33d6ff Scott Cheloha 2020-07-27 @697  	struct hv_get_perf_counter_info_params params;
59562b5c33d6ff Scott Cheloha 2020-07-27  698  	uint8_t bytes[HGPCI_MAX_DATA_BYTES];
59562b5c33d6ff Scott Cheloha 2020-07-27  699  } __packed;
59562b5c33d6ff Scott Cheloha 2020-07-27  700  

:::::: The code at line 697 was first introduced by commit
:::::: 59562b5c33d6ff3685509ed58b2ed3c5b5712704 powerpc/perf: consolidate GPCI hcall structs into asm/hvcall.h

:::::: TO: Scott Cheloha <cheloha@...ux.ibm.com>
:::::: CC: Michael Ellerman <mpe@...erman.id.au>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki