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btrfs: inline checksum name and driver definitions

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There's an unnecessary indirection in the checksum definition table,
pointer and the string itself. The strings are short and the overall
size of one entry is now 24 bytes.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2020-02-27 21:00:45 +01:00
parent 11c67b1a40
commit 59a0fcdb48
1 changed files with 4 additions and 3 deletions
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7
fs/btrfs/ctree.c
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@ -31,8 +31,8 @@ static void del_ptr(struct btrfs_root *root, struct btrfs_path *path,
static const struct btrfs_csums {
u16 size;
const char *name;
const char *driver;
const char name[10];
const char driver[12];
} btrfs_csums[] = {
[BTRFS_CSUM_TYPE_CRC32] = { .size = 4, .name = "crc32c" },
[BTRFS_CSUM_TYPE_XXHASH] = { .size = 8, .name = "xxhash64" },
@ -63,7 +63,8 @@ const char *btrfs_super_csum_name(u16 csum_type)
const char *btrfs_super_csum_driver(u16 csum_type)
{
/* csum type is validated at mount time */
return btrfs_csums[csum_type].driver ?:
return btrfs_csums[csum_type].driver[0] ?
btrfs_csums[csum_type].driver :
btrfs_csums[csum_type].name;
}