K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2020-02-12T11:12:13.859697Z
K 7
svn:log
V 467
amd64: store per-cpu allocations subtracted by __pcpu

This eliminates a runtime subtraction from counter_u64_add.

before:
mov    0x4f00ed(%rip),%rax        # 0xffffffff80c01788 <numfullpathfail4>
sub    0x808ff6(%rip),%rax        # 0xffffffff80f1a698 <__pcpu>
addq   $0x1,%gs:(%rax)

after:
mov    0x4f02fd(%rip),%rax        # 0xffffffff80c01788 <numfullpathfail4>
addq   $0x1,%gs:(%rax)

Reviewed by:	jeff
Differential Revision:	https://reviews.freebsd.org/D23570

END