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Message-ID: <202204052030.EJNYjMgU-lkp@intel.com>
Date: Tue, 5 Apr 2022 21:00:08 +0800
From: kernel test robot <lkp@...el.com>
To: David Howells <dhowells@...hat.com>
Cc: kbuild-all@...ts.01.org,
GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
linux-kernel@...r.kernel.org
Subject: [ammarfaizi2-block:dhowells/linux-fs/netfs-maple 33/40]
fs/netfs/buffered_write.c:28:40: sparse: sparse: incompatible types in
comparison expression (different type sizes):
tree: https://github.com/ammarfaizi2/linux-block dhowells/linux-fs/netfs-maple
head: 674eea41fc70a740ff83ec590f9833f805852464
commit: 073b0ba90614945b31bccfede6e00102b7eb460e [33/40] netfs: Implement buffered writes through netfs_file_write_iter()
config: i386-randconfig-s002 (https://download.01.org/0day-ci/archive/20220405/202204052030.EJNYjMgU-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-19) 11.2.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://github.com/ammarfaizi2/linux-block/commit/073b0ba90614945b31bccfede6e00102b7eb460e
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block dhowells/linux-fs/netfs-maple
git checkout 073b0ba90614945b31bccfede6e00102b7eb460e
# save the config file to linux build tree
mkdir build_dir
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash fs/netfs/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
sparse warnings: (new ones prefixed by >>)
>> fs/netfs/buffered_write.c:28:40: sparse: sparse: incompatible types in comparison expression (different type sizes):
>> fs/netfs/buffered_write.c:28:40: sparse: unsigned long *
>> fs/netfs/buffered_write.c:28:40: sparse: unsigned int *
>> fs/netfs/buffered_write.c:94:25: sparse: sparse: incompatible types in comparison expression (different signedness):
>> fs/netfs/buffered_write.c:94:25: sparse: unsigned long long *
>> fs/netfs/buffered_write.c:94:25: sparse: long long *
fs/netfs/buffered_write.c:95:25: sparse: sparse: incompatible types in comparison expression (different signedness):
fs/netfs/buffered_write.c:95:25: sparse: unsigned long long *
fs/netfs/buffered_write.c:95:25: sparse: long long *
vim +28 fs/netfs/buffered_write.c
18
19 static size_t copy_folio_from_iter_atomic(struct folio *folio,
20 unsigned int offset, size_t size,
21 struct iov_iter *i)
22 {
23 size_t copied = 0, n;
24
25 do {
26 unsigned int index = offset / PAGE_SIZE;
27 unsigned int poffset = offset % PAGE_SIZE;
> 28 unsigned int psize = min(PAGE_SIZE - offset, size);
29
30 n = copy_page_from_iter_atomic(folio_file_page(folio, index),
31 poffset, psize, i);
32 copied += n;
33 if (n < psize)
34 break;
35 size -= n;
36 } while (size);
37 return copied;
38 }
39
40 /*
41 * Initialise a new dirty folio group. We have to round it out to any crypto
42 * alignment.
43 */
44 static void netfs_init_dirty_region(struct netfs_i_context *ctx,
45 struct netfs_dirty_region *region,
46 struct file *file,
47 loff_t start, size_t len)
48 {
49 region->from = start;
50 region->to = start + len;
51 region->debug_id = atomic_inc_return(&netfs_region_debug_ids);
52
53 if (file && ctx->ops->init_dirty_region)
54 ctx->ops->init_dirty_region(region, file);
55
56 trace_netfs_ref_region(region->debug_id, refcount_read(®ion->ref),
57 netfs_region_trace_new);
58 }
59
60 /*
61 * Return true if two dirty regions are compatible such that b can be merged
62 * onto the end of a.
63 */
64 bool netfs_are_regions_mergeable(struct netfs_i_context *ctx,
65 struct netfs_dirty_region *a,
66 struct netfs_dirty_region *b)
67 {
68 if (!netfs_mas_is_valid(a) || !netfs_mas_is_valid(b))
69 return a == b;
70 if (b->waiting_on_wb != a->waiting_on_wb)
71 return false;
72 if (b->from != a->to &&
73 b->from < ctx->zero_point)
74 return false;
75 if (ctx->ops->are_regions_mergeable)
76 return ctx->ops->are_regions_mergeable(ctx, a, b);
77 return true;
78 }
79
80 /*
81 * Subsume the modifications into an existing target region. Returns true if
82 * we need to update the dirty_regions tree.
83 */
84 static bool netfs_subsume_into_existing(struct netfs_i_context *ctx,
85 struct folio *folio,
86 struct ma_state *mas,
87 struct netfs_dirty_region **_target,
88 struct netfs_dirty_region **_to_put,
89 pgoff_t *_first, pgoff_t *_last,
90 size_t offset, size_t len)
91 {
92 struct netfs_dirty_region *target = *_target, *prev;
93
> 94 target->from = min(target->from, folio_pos(folio) + offset);
95 target->to = max(target->to, folio_pos(folio) + offset + len);
96 trace_netfs_dirty(ctx, target, NULL, *_first, *_last,
97 netfs_dirty_trace_modified);
98
99 /* We might have bridged to the previous region also. */
100 prev = mas_prev(mas, *_first - 1);
101 if (!netfs_mas_is_valid(prev))
102 return false;
103
104 if (prev->to != target->from ||
105 prev->waiting_on_wb != target->waiting_on_wb)
106 return false;
107
108 *_first = mas->index;
109 prev->to = target->to;
110 *_to_put = target;
111 trace_netfs_dirty(ctx, prev, NULL, *_first, *_last,
112 netfs_dirty_trace_merged_prev);
113 return true;
114 }
115
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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