luck/tmp_suning_uos_patched
1
0
Fork 1
Code Issues Pull Requests Packages Projects Releases Wiki Activity

netlink: smaller nla_attr_minlen table

Browse Source 
Length of a netlink attribute may be u16 but lengths of basic attributes
are much smaller, so small we can save 16 bytes of .rodata and pocket
change inside .text.

16-bit is worse on x86-64 than 8-bit because of operand size override prefix.

	add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-19 (-19)
	function                                     old     new   delta
	validate_nla                                 418     417      -1
	nla_policy_len                                66      64      -2
	nla_attr_minlen                               32      16     -16
	Total: Before=154865051, After=154865032, chg -0.00%

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexey Dobriyan 2016-11-19 03:59:07 +03:00 committed by David S. Miller
parent 3b2c75d371
commit 32d84cdcfd
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/nlattr.c
View File

@ -14,7 +14,7 @@
#include <linux/types.h> #include <linux/types.h>
#include <net/netlink.h> #include <net/netlink.h>
static const u16 nla_attr_minlen[NLA_TYPE_MAX+1] = { static const u8 nla_attr_minlen[NLA_TYPE_MAX+1] = {
[NLA_U8] = sizeof(u8), [NLA_U8] = sizeof(u8),
[NLA_U16] = sizeof(u16), [NLA_U16] = sizeof(u16),
[NLA_U32] = sizeof(u32), [NLA_U32] = sizeof(u32),