Messages in this thread Patch in this message | | | From | Colin King <> | Subject | [PATCH] btrfs: make array types static const, reduces object code size | Date | Tue, 19 Sep 2017 16:01:23 +0100 |
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From: Colin Ian King <colin.king@canonical.com>
Don't populate the read-only array types on the stack, instead make it static const. Makes the object code smaller by nearly 60 bytes:
Before: text data bss dec hex filename 90536 6552 64 97152 17b80 fs/btrfs/ioctl.o
After: text data bss dec hex filename 90414 6616 64 97094 17b46 fs/btrfs/ioctl.o
Signed-off-by: Colin Ian King <colin.king@canonical.com> --- fs/btrfs/ioctl.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index a74ed6c12d6a..feab6f61cb97 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -4114,10 +4114,12 @@ static long btrfs_ioctl_space_info(struct btrfs_fs_info *fs_info, struct btrfs_ioctl_space_info *dest_orig; struct btrfs_ioctl_space_info __user *user_dest; struct btrfs_space_info *info; - u64 types[] = {BTRFS_BLOCK_GROUP_DATA, - BTRFS_BLOCK_GROUP_SYSTEM, - BTRFS_BLOCK_GROUP_METADATA, - BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA}; + static const u64 types[] = { + BTRFS_BLOCK_GROUP_DATA, + BTRFS_BLOCK_GROUP_SYSTEM, + BTRFS_BLOCK_GROUP_METADATA, + BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_METADATA + }; int num_types = 4; int alloc_size; int ret = 0; -- 2.14.1
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