ext2fs: fix -Walloc-size

GCC 14 introduces a new -Walloc-size included in -Wextra which gives:
```
lib/ext2fs/hashmap.c:37:36: warning: allocation of insufficient size ‘1’ for type ‘struct ext2fs_hashmap’ with size ‘20’ [-Walloc-size]
```

The calloc prototype is:
```
void *calloc(size_t nmemb, size_t size);
```

So, just swap the number of members and size arguments to match the prototype, as
we're initialising 1 struct of size `sizeof(...)`. GCC then sees we're not
doing anything wrong.

Signed-off-by: Sam James <sam@gentoo.org>
Link: https://lore.kernel.org/r/20231107233122.2013191-1-sam@gentoo.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/lib/ext2fs/hashmap.c b/lib/ext2fs/hashmap.c
index 697b2bc..1579467 100644 (file)
--- a/lib/ext2fs/hashmap.c
+++ b/lib/ext2fs/hashmap.c
@@ -34,8 +34,8 @@ struct ext2fs_hashmap *ext2fs_hashmap_create(
                                uint32_t(*hash_fct)(const void*, size_t),
                                void(*free_fct)(void*), size_t size)
 {
-       struct ext2fs_hashmap *h = calloc(sizeof(struct ext2fs_hashmap) +
-                               sizeof(struct ext2fs_hashmap_entry) * size, 1);
+       struct ext2fs_hashmap *h = calloc(1, sizeof(struct ext2fs_hashmap) +
+                               sizeof(struct ext2fs_hashmap_entry) * size);
        if (!h)
                return NULL;