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Date: Tue, 2 Aug 2022 00:26:14 +0800
From: kernel test robot <lkp@...el.com>
To: Aurelien Jarno <aurelien@...el32.net>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Palmer Dabbelt <palmer@...osinc.com>
Subject: drivers/clocksource/timer-clint.c:82:24: sparse: sparse: cast
removes address space '__iomem' of expression
Hi Aurelien,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 3d7cb6b04c3f3115719235cc6866b10326de34cd
commit: 6df2a016c0c8a3d0933ef33dd192ea6606b115e3 riscv: fix build with binutils 2.38
date: 6 months ago
config: riscv-randconfig-s041-20220801 (https://download.01.org/0day-ci/archive/20220802/202208020048.JB7pUSUy-lkp@intel.com/config)
compiler: riscv32-linux-gcc (GCC) 12.1.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-39-gce1a6720-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6df2a016c0c8a3d0933ef33dd192ea6606b115e3
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 6df2a016c0c8a3d0933ef33dd192ea6606b115e3
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/kernel/ drivers/clocksource/ net/dccp/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
sparse warnings: (new ones prefixed by >>)
>> drivers/clocksource/timer-clint.c:82:24: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/clocksource/timer-clint.c:82:24: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int [usertype] * @@
drivers/clocksource/timer-clint.c:82:24: sparse: expected void const volatile [noderef] __iomem *addr
drivers/clocksource/timer-clint.c:82:24: sparse: got unsigned int [usertype] *
drivers/clocksource/timer-clint.c:80:22: sparse: sparse: cast removes address space '__iomem' of expression
drivers/clocksource/timer-clint.c:80:22: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __iomem *addr @@ got unsigned int [usertype] * @@
drivers/clocksource/timer-clint.c:80:22: sparse: expected void const volatile [noderef] __iomem *addr
drivers/clocksource/timer-clint.c:80:22: sparse: got unsigned int [usertype] *
drivers/clocksource/timer-clint.c:237:36: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void * @@ got struct clock_event_device [noderef] __percpu * @@
drivers/clocksource/timer-clint.c:237:36: sparse: expected void *
drivers/clocksource/timer-clint.c:237:36: sparse: got struct clock_event_device [noderef] __percpu *
--
net/dccp/proto.c:524:52: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected restricted __be32 const [usertype] service @@ got int [addressable] val @@
net/dccp/proto.c:524:52: sparse: expected restricted __be32 const [usertype] service
net/dccp/proto.c:524:52: sparse: got int [addressable] val
>> net/dccp/proto.c:595:13: sparse: sparse: restricted __be32 degrades to integer
>> net/dccp/proto.c:595:13: sparse: sparse: restricted __be32 degrades to integer
net/dccp/proto.c:595:13: sparse: sparse: cast from restricted __be32
net/dccp/proto.c:707:57: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected restricted __be32 [usertype] param @@ got int cmsg_type @@
net/dccp/proto.c:707:57: sparse: expected restricted __be32 [usertype] param
net/dccp/proto.c:707:57: sparse: got int cmsg_type
vim +/__iomem +82 drivers/clocksource/timer-clint.c
2ac6795fcc085e Anup Patel 2020-08-17 68
2ac6795fcc085e Anup Patel 2020-08-17 69 #ifdef CONFIG_64BIT
2ac6795fcc085e Anup Patel 2020-08-17 70 static u64 notrace clint_get_cycles64(void)
2ac6795fcc085e Anup Patel 2020-08-17 71 {
2ac6795fcc085e Anup Patel 2020-08-17 72 return clint_get_cycles();
2ac6795fcc085e Anup Patel 2020-08-17 73 }
2ac6795fcc085e Anup Patel 2020-08-17 74 #else /* CONFIG_64BIT */
2ac6795fcc085e Anup Patel 2020-08-17 75 static u64 notrace clint_get_cycles64(void)
2ac6795fcc085e Anup Patel 2020-08-17 76 {
2ac6795fcc085e Anup Patel 2020-08-17 77 u32 hi, lo;
2ac6795fcc085e Anup Patel 2020-08-17 78
2ac6795fcc085e Anup Patel 2020-08-17 79 do {
2ac6795fcc085e Anup Patel 2020-08-17 80 hi = clint_get_cycles_hi();
2ac6795fcc085e Anup Patel 2020-08-17 81 lo = clint_get_cycles();
2ac6795fcc085e Anup Patel 2020-08-17 @82 } while (hi != clint_get_cycles_hi());
2ac6795fcc085e Anup Patel 2020-08-17 83
2ac6795fcc085e Anup Patel 2020-08-17 84 return ((u64)hi << 32) | lo;
2ac6795fcc085e Anup Patel 2020-08-17 85 }
2ac6795fcc085e Anup Patel 2020-08-17 86 #endif /* CONFIG_64BIT */
2ac6795fcc085e Anup Patel 2020-08-17 87
:::::: The code at line 82 was first introduced by commit
:::::: 2ac6795fcc085e8d03649f1bbd0d70aaff612cad clocksource/drivers: Add CLINT timer driver
:::::: TO: Anup Patel <anup.patel@....com>
:::::: CC: Palmer Dabbelt <palmerdabbelt@...gle.com>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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