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Wed, 18 Oct 2023 17:23:09 +0000 Date: Thu, 19 Oct 2023 01:22:42 +0800 From: kernel test robot To: Sia Jee Heng Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Palmer Dabbelt , Ley Foon Tan , Mason Huo , Conor Dooley , Andrew Jones Subject: arch/riscv/kernel/hibernate.c:76:65: warning: array subscript -1 is outside array bounds of 'const void[]' Message-ID: <202310190159.mAUo9iEX-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 06dc10eae55b5ceabfef287a7e5f16ceea204aa0 commit: c0317210012e3b985779ddd92a7c5db8424e1e97 RISC-V: Add arch functions to support hibernation/suspend-to-disk date: 6 months ago config: riscv-allyesconfig (https://download.01.org/0day-ci/archive/20231019/202310190159.mAUo9iEX-lkp@intel.com/config) compiler: riscv64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231019/202310190159.mAUo9iEX-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202310190159.mAUo9iEX-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from arch/riscv/include/asm/page.h:12, from arch/riscv/include/asm/thread_info.h:11, from include/linux/thread_info.h:60, from include/asm-generic/preempt.h:5, from ./arch/riscv/include/generated/asm/preempt.h:1, from include/linux/preempt.h:78, from include/linux/spinlock.h:56, from include/linux/mmzone.h:8, from include/linux/gfp.h:7, from include/linux/mm.h:7, from arch/riscv/include/asm/cacheflush.h:9, from arch/riscv/kernel/hibernate.c:11: arch/riscv/kernel/hibernate.c: In function 'pfn_is_nosave': >> arch/riscv/kernel/hibernate.c:76:65: warning: array subscript -1 is outside array bounds of 'const void[]' [-Warray-bounds=] 76 | unsigned long nosave_end_pfn = sym_to_pfn(&__nosave_end - 1); include/linux/pfn.h:22:43: note: in definition of macro 'PHYS_PFN' 22 | #define PHYS_PFN(x) ((unsigned long)((x) >> PAGE_SHIFT)) | ^ arch/riscv/include/asm/page.h:172:33: note: in expansion of macro '__phys_to_pfn' 172 | #define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x)) | ^~~~~~~~~~~~~ arch/riscv/include/asm/page.h:156:44: note: in expansion of macro 'RELOC_HIDE' 156 | #define __pa_symbol(x) __phys_addr_symbol(RELOC_HIDE((unsigned long)(x), 0)) | ^~~~~~~~~~ arch/riscv/include/asm/page.h:172:47: note: in expansion of macro '__pa_symbol' 172 | #define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x)) | ^~~~~~~~~~~ arch/riscv/kernel/hibernate.c:76:40: note: in expansion of macro 'sym_to_pfn' 76 | unsigned long nosave_end_pfn = sym_to_pfn(&__nosave_end - 1); | ^~~~~~~~~~ In file included from arch/riscv/include/asm/sections.h:8, from include/linux/interrupt.h:21, from include/linux/kernel_stat.h:9, from include/linux/cgroup.h:26, from include/linux/memcontrol.h:13, from include/linux/swap.h:9, from include/asm-generic/tlb.h:15, from arch/riscv/include/asm/tlb.h:14, from arch/riscv/include/asm/pgalloc.h:11, from arch/riscv/kernel/hibernate.c:14: include/asm-generic/sections.h:59:45: note: at offset -1 into object '__nosave_end' of size [0, 9223372036854775807] 59 | extern __visible const void __nosave_begin, __nosave_end; | ^~~~~~~~~~~~ vim +76 arch/riscv/kernel/hibernate.c 69 70 /* 71 * Check if the given pfn is in the 'nosave' section. 72 */ 73 int pfn_is_nosave(unsigned long pfn) 74 { 75 unsigned long nosave_begin_pfn = sym_to_pfn(&__nosave_begin); > 76 unsigned long nosave_end_pfn = sym_to_pfn(&__nosave_end - 1); 77 78 return ((pfn >= nosave_begin_pfn) && (pfn <= nosave_end_pfn)); 79 } 80 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki