From: Li Zefan <lizefan@huawei.com>
Date: Tue, 10 Jul 2012 02:22:35 +0000 (-0600)
Subject: Btrfs: rewrite BTRFS_SETGET_FUNCS
X-Git-Tag: v3.6-rc1~81^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=18077bb413687f96bd168efcfb2b8778529e3b74;p=pandora-kernel.git

Btrfs: rewrite BTRFS_SETGET_FUNCS

BTRFS_SETGET_FUNCS macro is used to generate btrfs_set_foo() and
btrfs_foo() functions, which read and write specific fields in the
extent buffer.

The total number of set/get functions is ~200, but in fact we only
need 8 functions: 2 for u8 field, 2 for u16, 2 for u32 and 2 for u64.

It results in redunction of ~37K bytes.

   text    data     bss     dec     hex filename
 629661   12489     216  642366   9cd3e fs/btrfs/btrfs.o.orig
 592637   12489     216  605342   93c9e fs/btrfs/btrfs.o

Signed-off-by: Li Zefan <lizefan@huawei.com>
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