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Date: Mon, 10 Oct 2022 09:25:57 +0800
From: kernel test robot <lkp@...el.com>
To: Shiyang Ruan <ruansy.fnst@...itsu.com>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
Linux Memory Management List <linux-mm@...ck.org>,
Christoph Hellwig <hch@....de>,
"Darrick J. Wong" <djwong@...nel.org>
Subject: fs/dax.c:1087:23: sparse: sparse: Using plain integer as NULL pointer
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 493ffd6605b2d3d4dc7008ab927dba319f36671f
commit: ff17b8df224b98e282ec39a9949a3672fa3dbe93 fsdax: introduce dax_iomap_cow_copy()
date: 3 months ago
config: arm64-randconfig-s042-20221009
compiler: aarch64-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=ff17b8df224b98e282ec39a9949a3672fa3dbe93
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout ff17b8df224b98e282ec39a9949a3672fa3dbe93
# 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=arm64 SHELL=/bin/bash
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 >>)
fs/dax.c:658:39: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned long v @@ got restricted vm_fault_t @@
fs/dax.c:658:39: sparse: expected unsigned long v
fs/dax.c:658:39: sparse: got restricted vm_fault_t
fs/dax.c:660:39: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned long v @@ got restricted vm_fault_t @@
fs/dax.c:660:39: sparse: expected unsigned long v
fs/dax.c:660:39: sparse: got restricted vm_fault_t
fs/dax.c:664:31: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned long v @@ got restricted vm_fault_t @@
fs/dax.c:664:31: sparse: expected unsigned long v
fs/dax.c:664:31: sparse: got restricted vm_fault_t
>> fs/dax.c:1087:23: sparse: sparse: Using plain integer as NULL pointer
fs/dax.c:1139:41: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected int result @@ got restricted vm_fault_t [assigned] [usertype] ret @@
fs/dax.c:1139:41: sparse: expected int result
fs/dax.c:1139:41: sparse: got restricted vm_fault_t [assigned] [usertype] ret
fs/dax.c:1580:46: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected int result @@ got restricted vm_fault_t [usertype] ret @@
fs/dax.c:1580:46: sparse: expected int result
fs/dax.c:1580:46: sparse: got restricted vm_fault_t [usertype] ret
fs/dax.c:1596:21: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted vm_fault_t [assigned] [usertype] ret @@ got unsigned long @@
fs/dax.c:1596:21: sparse: expected restricted vm_fault_t [assigned] [usertype] ret
fs/dax.c:1596:21: sparse: got unsigned long
fs/dax.c:1637:51: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected int result @@ got restricted vm_fault_t [assigned] [usertype] ret @@
fs/dax.c:1637:51: sparse: expected int result
fs/dax.c:1637:51: sparse: got restricted vm_fault_t [assigned] [usertype] ret
fs/dax.c:1718:21: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted vm_fault_t [assigned] [usertype] ret @@ got unsigned long @@
fs/dax.c:1718:21: sparse: expected restricted vm_fault_t [assigned] [usertype] ret
fs/dax.c:1718:21: sparse: got unsigned long
fs/dax.c:1752:62: sparse: sparse: incorrect type in argument 4 (different base types) @@ expected int result @@ got restricted vm_fault_t [assigned] [usertype] ret @@
fs/dax.c:1752:62: sparse: expected int result
fs/dax.c:1752:62: sparse: got restricted vm_fault_t [assigned] [usertype] ret
fs/dax.c:1815:55: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected int result @@ got restricted vm_fault_t @@
fs/dax.c:1815:55: sparse: expected int result
fs/dax.c:1815:55: sparse: got restricted vm_fault_t
fs/dax.c:1830:58: sparse: sparse: incorrect type in argument 3 (different base types) @@ expected int result @@ got restricted vm_fault_t [assigned] [usertype] ret @@
fs/dax.c:1830:58: sparse: expected int result
fs/dax.c:1830:58: sparse: got restricted vm_fault_t [assigned] [usertype] ret
fs/dax.c:257:13: sparse: sparse: context imbalance in 'wait_entry_unlocked' - unexpected unlock
fs/dax.c:439:49: sparse: sparse: context imbalance in 'dax_lock_page' - different lock contexts for basic block
fs/dax.c:506:17: sparse: sparse: context imbalance in 'dax_lock_mapping_entry' - different lock contexts for basic block
fs/dax.c:930:9: sparse: sparse: context imbalance in 'dax_writeback_one' - unexpected unlock
vim +1087 fs/dax.c
1064
1065 /**
1066 * dax_iomap_cow_copy - Copy the data from source to destination before write
1067 * @pos: address to do copy from.
1068 * @length: size of copy operation.
1069 * @align_size: aligned w.r.t align_size (either PMD_SIZE or PAGE_SIZE)
1070 * @srcmap: iomap srcmap
1071 * @daddr: destination address to copy to.
1072 *
1073 * This can be called from two places. Either during DAX write fault (page
1074 * aligned), to copy the length size data to daddr. Or, while doing normal DAX
1075 * write operation, dax_iomap_actor() might call this to do the copy of either
1076 * start or end unaligned address. In the latter case the rest of the copy of
1077 * aligned ranges is taken care by dax_iomap_actor() itself.
1078 */
1079 static int dax_iomap_cow_copy(loff_t pos, uint64_t length, size_t align_size,
1080 const struct iomap *srcmap, void *daddr)
1081 {
1082 loff_t head_off = pos & (align_size - 1);
1083 size_t size = ALIGN(head_off + length, align_size);
1084 loff_t end = pos + length;
1085 loff_t pg_end = round_up(end, align_size);
1086 bool copy_all = head_off == 0 && end == pg_end;
> 1087 void *saddr = 0;
1088 int ret = 0;
1089
1090 ret = dax_iomap_direct_access(srcmap, pos, size, &saddr, NULL);
1091 if (ret)
1092 return ret;
1093
1094 if (copy_all) {
1095 ret = copy_mc_to_kernel(daddr, saddr, length);
1096 return ret ? -EIO : 0;
1097 }
1098
1099 /* Copy the head part of the range */
1100 if (head_off) {
1101 ret = copy_mc_to_kernel(daddr, saddr, head_off);
1102 if (ret)
1103 return -EIO;
1104 }
1105
1106 /* Copy the tail part of the range */
1107 if (end < pg_end) {
1108 loff_t tail_off = head_off + length;
1109 loff_t tail_len = pg_end - end;
1110
1111 ret = copy_mc_to_kernel(daddr + tail_off, saddr + tail_off,
1112 tail_len);
1113 if (ret)
1114 return -EIO;
1115 }
1116 return 0;
1117 }
1118
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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