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Message-ID: <202310190159.mAUo9iEX-lkp@intel.com>
Date: Thu, 19 Oct 2023 01:22:42 +0800
From: kernel test robot <lkp@...el.com>
To: Sia Jee Heng <jeeheng.sia@...rfivetech.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Palmer Dabbelt <palmer@...osinc.com>,
Ley Foon Tan <leyfoon.tan@...rfivetech.com>,
Mason Huo <mason.huo@...rfivetech.com>,
Conor Dooley <conor.dooley@...rochip.com>,
Andrew Jones <ajones@...tanamicro.com>
Subject: arch/riscv/kernel/hibernate.c:76:65: warning: array subscript -1 is
outside array bounds of 'const void[]'
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 <lkp@...el.com>
| 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
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