3:42 p.m.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 3cea11cd5e3b00d91caf0b4730194039b45c5891
commit: b3e79e7682e075326df8041b826b03453acacd0a mtd: physmap: Add Baikal-T1 physically
mapped ROM support
date: 4 weeks ago
config: sparc64-randconfig-s032-20201031 (attached as .config)
compiler: sparc64-linux-gcc (GCC) 9.3.0
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: v0.6.3-76-gf680124b-dirty
#
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit...
git remote add linus
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout b3e79e7682e075326df8041b826b03453acacd0a
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1
CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=sparc64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
"sparse warnings: (new ones prefixed by >>)"
> drivers/mtd/maps/physmap-bt1-rom.c:78:18: sparse: sparse: cast
removes address space '__iomem' of expression
vim +/__iomem +78 drivers/mtd/maps/physmap-bt1-rom.c
57
58 static void __xipram bt1_rom_map_copy_from(struct map_info *map,
59 void *to, unsigned long from,
60 ssize_t len)
61 {
62 void __iomem *src = map->virt + from;
63 ssize_t shift, chunk;
64 u32 data;
65
66 if (len <= 0 || from >= map->size)
67 return;
68
69 /* Make sure we don't go over the map limit. */
70 len = min_t(ssize_t, map->size - from, len);
71
72 /*
73 * Since requested data size can be pretty big we have to implement
74 * the copy procedure as optimal as possible. That's why it's split
75 * up into the next three stages: unaligned head, aligned body,
76 * unaligned tail.
77 */
78 shift = (ssize_t)src & 0x3;
79 if (shift) {
80 chunk = min_t(ssize_t, 4 - shift, len);
81 data = readl_relaxed(src - shift);
82 memcpy(to, &data + shift, chunk);
83 src += chunk;
84 to += chunk;
85 len -= chunk;
86 }
87
88 while (len >= 4) {
89 data = readl_relaxed(src);
90 memcpy(to, &data, 4);
91 src += 4;
92 to += 4;
93 len -= 4;
94 }
95
96 if (len) {
97 data = readl_relaxed(src);
98 memcpy(to, &data, len);
99 }
100 }
101
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org