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author | Eric Dumazet <dada1@cosmosbay.com> | 2007-05-03 20:39:04 -0400 |
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committer | David S. Miller <davem@davemloft.net> | 2007-05-03 20:39:04 -0400 |
commit | db3459d1a71d885334831cdca6646a48f5ea0483 (patch) | |
tree | 62bd17f8abb8c4fac280103b6179e275490c5b15 /lib/locking-selftest-rlock-softirq.h | |
parent | b40b4f79ce789e9e28d382c85006f62be2725282 (diff) |
[IPV6]: Some cleanups in include/net/ipv6.h
1) struct ip6_flowlabel : moves 'users' field to avoid two 32bits
holes for 64bit arches. Shrinks by 8 bytes sizeof(struct
ip6_flowlabel)
2) ipv6_addr_cmp() and ipv6_addr_copy() dont need (void *) casts :
Compiler might take into account natural alignement of in6_addr
structs to emit better code for memcpy()/memcmp() Casts to (void *)
force byte accesses.
3) ipv6_addr_prefix() optimization :
Better to clear whole struct, as compiler can emit better code for
memset(addr, 0, 16) (2 stores on x86_64), and avoid some conditional
branches.
# size vmlinux.after vmlinux.before
text data bss dec hex filename
5262262 647612 557432 6467306 62aeea vmlinux.after
5262550 647612 557432 6467594 62b00a vmlinux.before
thats 288 bytes saved.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/locking-selftest-rlock-softirq.h')
0 files changed, 0 insertions, 0 deletions