We have allocated the root with kzalloc() so all the memory is already
zero initialized, therefore it's redundant to assign 0 and NULL to several
of the root members. Remove all of them except the atomic initializations
since atomic_t is an opaque type and it's not a good practice to assume
its internals.
This slightly reduces the binary size.
With gcc 14.2.0-19 from Debian on x86_64, before this change:
$ size fs/btrfs/btrfs.ko
text data bss dec hex filename
1939404 162963 15592 2117959 205147 fs/btrfs/btrfs.ko
After this change:
$ size fs/btrfs/btrfs.ko
text data bss dec hex filename
1939212 162963 15592 2117767 205087 fs/btrfs/btrfs.ko
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
1c3e03b340