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| author | Arnd Bergmann <arnd@arndb.de> | 2021-03-23 14:03:32 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-03-24 15:16:09 -0700 |
| commit | 4adec7f81df8e4fbf55f9d5ca98afa39f15b050f (patch) | |
| tree | 63d515f89bec673f2ed9917820e966f32b05da45 /lib/test_rhashtable.c | |
| parent | b7fbc88692e60a4955ac54af0bcf7f2162761339 (diff) | |
| download | linux-4adec7f81df8e4fbf55f9d5ca98afa39f15b050f.tar.bz2 | |
rhashtable: avoid -Wrestrict warning on overlapping sprintf output
sprintf() is declared with a restrict keyword to not allow input and
output to point to the same buffer:
lib/test_rhashtable.c: In function 'print_ht':
lib/test_rhashtable.c:504:4: error: 'sprintf' argument 3 overlaps destination object 'buff' [-Werror=restrict]
504 | sprintf(buff, "%s\nbucket[%d] -> ", buff, i);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/test_rhashtable.c:489:7: note: destination object referenced by 'restrict'-qualified argument 1 was declared here
489 | char buff[512] = "";
| ^~~~
Rework this function to remember the last offset instead to
avoid the warning.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/test_rhashtable.c')
| -rw-r--r-- | lib/test_rhashtable.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/lib/test_rhashtable.c b/lib/test_rhashtable.c index 76c607ee6db5..5a1dd4736b56 100644 --- a/lib/test_rhashtable.c +++ b/lib/test_rhashtable.c @@ -487,6 +487,7 @@ static unsigned int __init print_ht(struct rhltable *rhlt) struct rhashtable *ht; const struct bucket_table *tbl; char buff[512] = ""; + int offset = 0; unsigned int i, cnt = 0; ht = &rhlt->ht; @@ -501,18 +502,18 @@ static unsigned int __init print_ht(struct rhltable *rhlt) next = !rht_is_a_nulls(pos) ? rht_dereference(pos->next, ht) : NULL; if (!rht_is_a_nulls(pos)) { - sprintf(buff, "%s\nbucket[%d] -> ", buff, i); + offset += sprintf(buff + offset, "\nbucket[%d] -> ", i); } while (!rht_is_a_nulls(pos)) { struct rhlist_head *list = container_of(pos, struct rhlist_head, rhead); - sprintf(buff, "%s[[", buff); + offset += sprintf(buff + offset, "[["); do { pos = &list->rhead; list = rht_dereference(list->next, ht); p = rht_obj(ht, pos); - sprintf(buff, "%s val %d (tid=%d)%s", buff, p->value.id, p->value.tid, + offset += sprintf(buff + offset, " val %d (tid=%d)%s", p->value.id, p->value.tid, list? ", " : " "); cnt++; } while (list); @@ -521,7 +522,7 @@ static unsigned int __init print_ht(struct rhltable *rhlt) next = !rht_is_a_nulls(pos) ? rht_dereference(pos->next, ht) : NULL; - sprintf(buff, "%s]]%s", buff, !rht_is_a_nulls(pos) ? " -> " : ""); + offset += sprintf(buff + offset, "]]%s", !rht_is_a_nulls(pos) ? " -> " : ""); } } printk(KERN_ERR "\n---- ht: ----%s\n-------------\n", buff); |