LOR: re(4) using an enabled DEVICE_POLLING kernel.

Hello,

Trying to solve my old re(4) problem (see PR kern/80005) and seeing if
polling(4) can help me in this area, i encountered this new LOR:

lock order reversal
 1st 0xc2412cb0 re0 (network driver) _at_ /usr/src/sys/dev/re/if_re.c:2098
 2nd 0xc09dfae0 Giant (Giant) _at_ /usr/src/sys/kern/kern_poll.c:460
KDB: stack backtrace:
kdb_backtrace(c0915d56,c09dfae0,c09250a6,c09250a6,c09116db) at
kdb_backtrace+0x2f
witness_checkorder(c09dfae0,9,c09116db,1cc,1) at witness_checkorder+0x6d0
_mtx_lock_flags(c09dfae0,0,c09116db,1cc,c2523400) at _mtx_lock_flags+0x85
ether_poll_deregister(c2523400,c2412800,0,954,c2412800) at
ether_poll_deregister+0x2e
re_stop(c2412800,1,c08ff33d,83f,c2527a00) at re_stop+0x65
re_init_locked(c2412800,0,c08ff33d,832,c2523400) at re_init_locked+0x4a
re_init(c2412800,c06c523d,c09e73c0,8020690c,0) at re_init+0x3d
ether_ioctl(c2523400,8020690c,c2735c00,c091583d,c2412800) at ether_ioctl+0x74
re_ioctl(c2523400,8020690c,c2735c00,5,0) at re_ioctl+0x207
in6_ifinit(c2523400,c2735c00,ef4f0b00,1,c2793000) at in6_ifinit+0xd1
in6_update_ifa(c2523400,ef4f0af0,0,c22cf2d4,c22cf180) at in6_update_ifa+0x538
in6_ifattach_linklocal(c2523400,0,246,c09e73c0,c09877a8) at
in6_ifattach_linklocal+0x10e
in6_ifattach(c2523400,0,0,0,0) at in6_ifattach+0xd5
in6_if_up(c2523400,c25258a0) at in6_if_up+0x1b
if_route(c2523400,1,0,ef4f0c3c,c07145ef) at if_route+0x74
if_up(c2523400,ef4f0c1c,c0692640,c0a2e7a0,1) at if_up+0x21
ifhwioctl(80206910,c2523400,c27675e0,c2793000,2) at ifhwioctl+0x2a6
ifioctl(c2827b20,80206910,c27675e0,c2793000,1) at ifioctl+0xea
soo_ioctl(c2795708,80206910,c27675e0,c22cba80,c2793000) at soo_ioctl+0x39c
ioctl(c2793000,ef4f0d04,c,422,3) at ioctl+0x463
syscall(805003b,805003b,bfbf003b,4,1) at syscall+0x295
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (54, FreeBSD ELF32, ioctl), eip = 0x280cc2ff, esp =
0xbfbfe90c, ebp = 0xbfbfe958 ---

# uname -a
FreeBSD boboche.thilelli.net 6.0-BETA3 FreeBSD 6.0-BETA3 #1: Sat Aug 27
14:36:42 CEST 2005    
root_at_boboche.thilelli.net:/usr/obj/usr/src/sys/BOBOCHE  i386
# ident /usr/src/sys/dev/re/if_re.c
/usr/src/sys/dev/re/if_re.c:
     $FreeBSD: src/sys/dev/re/if_re.c,v 1.46.2.3 2005/08/25 05:01:14
rwatson Exp $
# ident /usr/src/sys/kern/kern_poll.c
/usr/src/sys/kern/kern_poll.c:
     $FreeBSD: src/sys/kern/kern_poll.c,v 1.19.2.1 2005/08/25 05:01:19
rwatson Exp $

Side note: it doesn't solve or change anything for the PR kern/80005
though.


Regards,
-- 
-jpeg.