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f9d9182d64
freebsd-dev/sys
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Marcel Moolenaar f9d9182d64 Work-around a compiler optimization bug, that broke libthr. Massive 
inlining resulted in constant propagation to the extend that cmpval
was known to the compiler to be URWLOCK_WRITE_OWNER (= 0x80000000U).
Unfortunately, instead of zero-extending the unsigned constant, it
was sign-extended. As such, the cmpxchg instruction was comparing
0x0000000080000000LU to 0xffffffff80000000LU and obviously didn't
perform the exchange.
But, since the value returned by cmpxhg equalled cmpval (when zero-
extended), the _thr_rtld_lock_release() function thought the exchange
did happen and as such returned as if having released the lock. This
was not the case. Subsequent locking requests found rw_state non-zero
and the thread in question entered the kernel and block indefinitely.

The work-around is to zero-extend by casting to uint64_t.
2008-05-28 16:41:02 +00:00
..
amd64 Add jme(4) to the list of drivers supported by GENERIC kernel. 2008-05-27 02:22:32 +00:00
arm Release the resources for the registers for the TWI device with 2008-05-28 14:35:15 +00:00
boot Add an entry for the jme(4) module. 2008-05-27 02:13:25 +00:00
bsm Merge OpenBSM 1.0 changes to src/sys/bsm: 2007-10-29 18:47:25 +00:00
cam Locking in the ses_ioctl handler doesn't have to be so strict because 2008-03-17 17:18:16 +00:00
cddl Fix namespace collision after src/sys/sys/file.h:1.78. 2008-05-25 22:34:17 +00:00
compat Fix a panic when it occurred during initializing the ndis driver because 2008-05-15 04:29:28 +00:00
conf Rename tty_subr.c' to subr_clist.c'. 2008-05-27 06:41:50 +00:00
contrib Add code to allow the system to handle multiple routing tables. 2008-05-09 23:03:00 +00:00
crypto Make test00 compilable again. 2008-01-15 18:34:47 +00:00
ddb Rename debug.ddb.capture.bytes sysctl to debug.ddb.capture.bufoff in 2008-04-25 13:23:36 +00:00
dev Release pcm mutex before calling snd_clone_unref(), which in turns might 2008-05-27 02:16:05 +00:00
fs - Add locking to all filesystem operations in fdescfs and flag it as MPSAFE. 2008-05-24 14:51:30 +00:00
gdb Commit SYSINIT() ;-adding patch missed in previous pass. 2008-03-16 13:02:04 +00:00
geom - Recognize the 'volume' parameter when creating a plex. 2008-05-22 10:27:03 +00:00
gnu Move the head of byte-level advisory lock list from the 2008-04-16 11:33:32 +00:00
i386 Add jme(4) to the list of drivers supported by GENERIC kernel. 2008-05-27 02:22:32 +00:00
ia64 Work-around a compiler optimization bug, that broke libthr. Massive 2008-05-28 16:41:02 +00:00
isa atrtc.c is a repocopy of the RTC device driver from i386/isa/clock.c 2008-04-14 07:57:15 +00:00
kern Rename tty_subr.c' to subr_clist.c'. 2008-05-27 06:41:50 +00:00
libkern Add prototype for __cmpd2(). 2008-02-23 22:40:05 +00:00
mips Retire pmap_addr_hint(). It is no longer used. 2008-05-18 04:16:57 +00:00
modules Hook up jme(4) to the build. 2008-05-27 01:54:45 +00:00
net The if_check() function performed three actions: 2008-05-17 03:38:13 +00:00
net80211 special-case broadcast probe request in ieee80211_find_rxnode; we need 2008-05-22 22:22:10 +00:00
netatalk Add code to allow the system to handle multiple routing tables. 2008-05-09 23:03:00 +00:00
netgraph Remove netatm from HEAD as it is not MPSAFE and relies on the now removed 2008-05-25 22:11:40 +00:00
netinet Factor out the v4-only vs. the v6-only inp_flags processing in 2008-05-24 15:20:48 +00:00
netinet6 Factor out the v4-only vs. the v6-only inp_flags processing in 2008-05-24 15:20:48 +00:00
netipsec In addition to the ipsec_osdep.h removal a week ago, now also eliminate 2008-05-24 15:32:46 +00:00
netipx Avoid unnecessary one use of dtom(9) in spx_input(). 2008-05-26 22:54:38 +00:00
netnatm
netncp lockmgrs need to be released before to be destroyed and draining doesn't 2008-03-30 18:16:33 +00:00
netsmb Really, smb_iod_main() is not totally MPSAFE, so just acquire and drop 2008-03-27 01:23:59 +00:00
nfs Replaced the misleading uses of a historical artefact M_TRYWAIT with M_WAIT. 2008-03-25 09:39:02 +00:00
nfs4client Once the ENOLCK is detected we expect to retry the acquisition. 2008-05-27 00:20:19 +00:00
nfsclient Once the ENOLCK is detected we expect to retry the acquisition. 2008-05-27 00:20:19 +00:00
nfsserver Change the fix in the rev. 1.179 to use nfsrv_lockedpair_nd(). 2008-05-28 16:23:17 +00:00
nlm Tighten up the error-handling in nlm_get_rpc. While I'm here, fix a 2008-04-16 09:09:50 +00:00
opencrypto Make ftruncate a 'struct file' operation rather than a vnode operation. 2008-01-07 20:05:19 +00:00
pc98 Remove ISDN4BSD (I4B) from HEAD as it is not MPSAFE and 2008-05-26 10:40:09 +00:00
pccard
pci Remove unused 'xl_unit' member from softc. 2008-05-28 15:34:29 +00:00
powerpc Invalidate the TLB in pmap_cpu_bootstrap(), so that it also happens 2008-05-23 19:16:24 +00:00
rpc Fix some issues that showed up during Kris' testing. 2008-04-11 10:34:59 +00:00
security Plug a memory leak which can occur when multiple MAC policies are loaded 2008-05-27 14:18:02 +00:00
sparc64 The VM system no longer uses setPQL2(). Remove it and its helpers. 2008-05-23 04:03:54 +00:00
sun4v Use the "options " spelling (vs. "options<TAB>") so that commented lines 2008-05-21 03:36:53 +00:00
sys Use _WANT_FILE to make struct file visible from userland. This is 2008-05-26 15:12:47 +00:00
tools Introduce a standalone shell script for embedding MFS image. 2008-02-05 10:46:30 +00:00
ufs Fix comments to replace SBSIZE with SBLOCKSIZE, since SBSIZE 2008-05-24 20:44:14 +00:00
vm To date, our implementation of munmap(2) has required that the 2008-05-24 21:57:16 +00:00
xdr Add the new kernel-mode NFS Lock Manager. To use it instead of the 2008-03-26 15:23:12 +00:00
Makefile Remove ISDN4BSD (I4B) from HEAD as it is not MPSAFE and 2008-05-26 10:40:09 +00:00