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freebsd-skq/sys/kern
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iedowse 885a9694bc Add a mechanism for associating a mutex with a callout when the 
callout is first initialised, using a new function callout_init_mtx().
The callout system will acquire this mutex before calling the callout
function and release it on return.

In addition, the callout system uses the mutex to avoid most of the
complications and race conditions inherent in asynchronous timer
facilities, so mutex-protected callouts have much simpler semantics.
As long as the mutex is held when invoking callout_stop() or
callout_reset(), then these functions will guarantee that the callout
will be stopped, even if softclock() had already begun to process
the callout.

Existing Giant-locked callouts will automatically pick up the new
race-free semantics. This should close a number of race conditions
in the USB code and probably other areas of the kernel too.

There should be no change in behaviour for "MP-safe" callouts; these
still need to use the techniques mentioned in timeout(9) to avoid
race conditions.
2005-02-07 02:47:33 +00:00
..
bus_if.m /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
clock_if.m /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
cpufreq_if.m Add an interface for cpufreq. The kernel interface lets other drivers 2005-02-04 05:38:30 +00:00
device_if.m /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
genassym.sh
imgact_aout.c o Split out kernel part of execve(2) syscall into two parts: one that 2005-01-29 23:12:00 +00:00
imgact_elf32.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
imgact_elf64.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
imgact_elf.c o Split out kernel part of execve(2) syscall into two parts: one that 2005-01-29 23:12:00 +00:00
imgact_gzip.c o Split out kernel part of execve(2) syscall into two parts: one that 2005-01-29 23:12:00 +00:00
imgact_shell.c Fix build on AMD64 (and probably other arches where size_t != int). 2005-01-30 06:43:17 +00:00
inflate.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
init_main.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
init_sysent.c - Regen 2005-01-26 02:29:18 +00:00
kern_acct.c In acct_process(), do a lockless read of acctvp to see if it's NULL 2005-01-08 04:45:57 +00:00
kern_acl.c Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is 2004-07-26 07:24:04 +00:00
kern_alq.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_clock.c - Define KTR points for KTR_SCHED. 2004-12-26 00:14:21 +00:00
kern_condvar.c Refine the turnstile and sleep queue interfaces just a bit: 2004-10-12 18:36:20 +00:00
kern_conf.c Use MAXMINOR 2005-01-29 16:50:04 +00:00
kern_context.c Change the clear_ret argument of get_mcontext() to be a flags argument. 2003-11-09 20:31:04 +00:00
kern_cpu.c Add support for relative cpufreq drivers. Such drivers modulate clock 2005-02-06 21:08:35 +00:00
kern_descrip.c Don't use VOP_GETVOBJECT, use vp->v_object directly. 2005-01-25 00:40:01 +00:00
kern_environment.c Retire TUNABLE_QUAD_*. 2004-11-08 18:22:22 +00:00
kern_event.c Move a FILEDESC_UNLOCK upwards to silence witness. 2004-11-16 14:41:31 +00:00
kern_exec.c Grrr, this committer needs to have a sleep. Remove lines from the previous 2005-01-29 23:51:05 +00:00
kern_exit.c In 1.276 of kern/subr_trap.c I introduced a mechanism for delaying 2005-01-29 14:03:41 +00:00
kern_fork.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_idle.c Set the scheduling class of the idle threads to PRI_IDLE. 2005-02-04 06:16:05 +00:00
kern_intr.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_jail.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_kse.c o Split out kernel part of execve(2) syscall into two parts: one that 2005-01-29 23:12:00 +00:00
kern_kthread.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_ktr.c - Change the ddb paging "support" to use a variable (db_lines_per_page) to 2004-11-01 22:15:15 +00:00
kern_ktrace.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_linker.c When trying each linker class in turn with a preloaded module, exit 2004-08-27 01:20:26 +00:00
kern_lock.c - Include LK_INTERLOCK in LK_EXTFLG_MASK so that it makes its way into 2005-01-25 16:06:05 +00:00
kern_lockf.c - Make lf_print static and move its prototype into kern_lockf.c 2005-01-25 10:15:26 +00:00
kern_mac.c Bump MAC Framework version to 2 in preparation for the upcoming API/ABI 2004-11-09 11:28:40 +00:00
kern_malloc.c Bring in MemGuard, a very simple and small replacement allocator 2005-01-21 18:09:17 +00:00
kern_mbuf.c Update copyright, remove "all rights reserved" (since they are not 2005-02-01 03:17:52 +00:00
kern_mib.c Fix spelling of integer in a comment. 2005-01-30 00:31:19 +00:00
kern_module.c Add a 32bit syscall wrapper for modstat 2005-01-19 17:53:06 +00:00
kern_mtxpool.c Expand COPYRIGHT inline, per Matthew Dillon's earlier approval. 2005-01-06 23:34:38 +00:00
kern_mutex.c Rework the optimization for spinlocks on UP to be slightly less drastic and 2005-01-05 21:13:27 +00:00
kern_ntptime.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_physio.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_poll.c Add a NULL param to an mi_switch() that I missed. 2004-07-03 02:38:03 +00:00
kern_proc.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_prot.c Style cleanup: with removal of mutex operations, we can also remove 2005-01-23 21:11:39 +00:00
kern_resource.c Stop explicitly touching td_base_pri outside of the scheduler and simply 2004-12-30 20:29:58 +00:00
kern_sema.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_shutdown.c Replace a printf with a KASSERT that we are indeed running on the BSP. 2004-11-30 06:21:38 +00:00
kern_sig.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_subr.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_switch.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_sx.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_synch.c Stop explicitly touching td_base_pri outside of the scheduler and simply 2004-12-30 20:29:58 +00:00
kern_syscalls.c Do a pass over all modules in the kernel and make them return EOPNOTSUPP 2004-07-15 08:26:07 +00:00
kern_sysctl.c Be consistent and always use form 'return (value);' instead of 'return value;'. 2004-12-31 14:52:53 +00:00
kern_tc.c Put on my peril sensitive sunglasses and add a flags field to the internal 2004-10-11 22:04:16 +00:00
kern_thr.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_thread.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_time.c Split out kernel side of {get,set}itimer(2) into two parts: the first that 2005-01-25 21:28:28 +00:00
kern_timeout.c Add a mechanism for associating a mutex with a callout when the 2005-02-07 02:47:33 +00:00
kern_umtx.c Revert my previous errno hack, that is certainly an issue, 2005-01-18 13:53:10 +00:00
kern_uuid.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
kern_xxx.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
ksched.c /* -> /*- for license, minor formatting changes 2005-01-07 02:29:27 +00:00
link_elf_obj.c Add support for completing the installation of ELF relocatable 2004-08-29 01:21:51 +00:00
link_elf.c Normalize the VM wiring done with SPARSE_MAPPING: check for errors, and 2004-08-09 18:46:13 +00:00
linker_if.m /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
Make.tags.inc Finish driving a stake through the heart of netns and the associated 2003-03-05 19:24:24 +00:00
Makefile Finish driving a stake through the heart of netns and the associated 2003-03-05 19:24:24 +00:00
makesyscalls.sh Remove the namespace column from the syscalls tables. We don't actually 2003-12-23 03:50:43 +00:00
md4c.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
md5c.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
p1003_1b.c /* -> /*- for license, minor formatting changes 2005-01-07 02:29:27 +00:00
posix4_mib.c Back when VOP_* was introduced, we did not have new-style struct 2004-12-01 23:16:38 +00:00
sched_4bsd.c Rework the interface between priority propagation (lending) and the 2004-12-30 20:52:44 +00:00
sched_ule.c - Add ke_runq == NULL to the conditions which will cause us to abort 2005-02-04 17:22:46 +00:00
subr_acl_posix1e.c Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is 2004-07-26 07:24:04 +00:00
subr_autoconf.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_blist.c Move the definitions of SWAPBLK_NONE and SWAPBLK_MASK from vm_page.h to 2004-06-04 04:03:26 +00:00
subr_bus.c Correct a minr whitespace inconsistency introduced in revision 1.159: 2005-01-29 22:04:30 +00:00
subr_clist.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_clock.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_devstat.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_disk.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_eventhandler.c Use 'const char *' for a few prototypes. 2004-12-06 10:53:40 +00:00
subr_hints.c Add a resource_disabled() helper function that returns true (non-zero) if 2003-07-02 16:01:38 +00:00
subr_kdb.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_kobj.c * Add multiple inheritance to kobj. Each class can have zero or more base 2003-10-16 09:16:28 +00:00
subr_log.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_mbpool.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_mchain.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_module.c Use __FBSDID(). 2003-06-11 00:56:59 +00:00
subr_msgbuf.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_param.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_pcpu.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_power.c Move the kernel power change printf under bootverbose since the 2004-01-02 18:24:13 +00:00
subr_prf.c Update for the KDB framework: 2004-07-10 21:43:23 +00:00
subr_prof.c - Move TDF_OWEPREEMPT, TDF_OWEUPC, and TDF_USTATCLOCK over to td_pflags 2004-07-16 21:04:55 +00:00
subr_rman.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_rtc.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_sbuf.c Cosmetic adjustment to previous commit: name the second argument to 2004-07-09 11:37:44 +00:00
subr_scanf.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
subr_sleepqueue.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_smp.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_taskqueue.c Add taskqueue_drain. This waits for the specified task to finish, if 2004-10-05 04:16:01 +00:00
subr_trap.c Whitespace fix. 2004-12-30 20:30:58 +00:00
subr_turnstile.c Rework the interface between priority propagation (lending) and the 2004-12-30 20:52:44 +00:00
subr_unit.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
subr_witness.c When DDB is not defined, don't implement witness_thread_has_locks() and 2005-01-22 21:14:21 +00:00
sys_generic.c Previously a read of zero bytes got handled in devfs:vop_read() but I 2005-01-25 09:15:32 +00:00
sys_pipe.c Rearrange the kninit calls for both directions of a pipe so that 2005-01-17 07:56:28 +00:00
sys_process.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
sys_socket.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
syscalls.c - Regen for recent vfs syscall changes. 2005-01-24 10:50:42 +00:00
syscalls.master - Struct mount is not yet locked well enough to allow 2005-01-26 02:28:43 +00:00
sysv_ipc.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
sysv_msg.c Split out kernel side of msgctl(2) into two parts: the first that pops data 2005-01-26 00:46:36 +00:00
sysv_sem.c Invoke label initialization, creation, cleanup, and tear-down MAC 2005-01-22 19:04:17 +00:00
sysv_shm.c Invoke label initialization, creation, cleanup, and tear-down MAC 2005-01-22 19:10:25 +00:00
tty_compat.c Put the pre FreeBSD-2.x tty compat code under BURN_BRIDGES. 2004-06-21 22:57:16 +00:00
tty_conf.c Preparation commit for the tty cleanups that will follow in the near 2004-07-15 20:47:41 +00:00
tty_cons.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
tty_pty.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
tty_subr.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
tty_tty.c Second half of the dev_t cleanup. 2004-06-17 17:16:53 +00:00
tty.c Call tty_close() at the very end of ttyclose() since otherwise NULL 2004-12-30 19:24:49 +00:00
uipc_accf.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
uipc_cow.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
uipc_domain.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
uipc_mbuf2.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
uipc_mbuf.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
uipc_proto.c Remove advertising clause from University of California Regent's license, 2004-04-05 21:03:37 +00:00
uipc_sem.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
uipc_sockbuf.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
uipc_socket2.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
uipc_socket.c - Convert so_qlen, so_incqlen, so_qlimit fields of struct socket from 2005-01-24 12:20:21 +00:00
uipc_syscalls.c Extend kern_sendit() to take another enum uio_seg argument, which specifies 2005-01-30 07:20:36 +00:00
uipc_usrreq.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
vfs_acl.c Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is 2004-07-26 07:24:04 +00:00
vfs_aio.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
vfs_bio.c - Don't release BKGRDINPROG until after we've bufdone'd the copy. 2005-02-05 01:26:14 +00:00
vfs_cache.c - Simplify the cache locking. The lock order relationship with the 2005-01-24 10:24:12 +00:00
vfs_cluster.c - Remove GIANT_REQUIRED where giant is no longer required. 2005-01-24 10:33:46 +00:00
vfs_default.c Move the contents of vop_stddestroyvobject() to the new vnode_pager 2005-01-28 08:56:48 +00:00
vfs_export.c /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
vfs_extattr.c - Correct a typo in kern_rename. tvfslocked should be initialized from 2005-02-02 17:17:15 +00:00
vfs_init.c Change the generated VOP_ macro implementations to improve type checking 2005-01-13 07:53:01 +00:00
vfs_lookup.c Don't call VOP_CREATEVOBJECT(), it's the responsibility of the 2005-01-24 23:53:54 +00:00
vfs_mount.c - Move gets() function to libkern (I want to use it outside vfs_mount.c). 2005-02-03 15:10:58 +00:00
vfs_subr.c Remove unused argument to vrecycle() 2005-01-28 13:08:21 +00:00
vfs_syscalls.c - Correct a typo in kern_rename. tvfslocked should be initialized from 2005-02-02 17:17:15 +00:00
vfs_vnops.c Don't call VOP_CREATEVOBJECT(), it's the responsibility of the 2005-01-24 23:53:54 +00:00
vnode_if.src Take VOP_GETVOBJECT() out to pasture. We use the direct pointer now. 2005-01-25 00:42:16 +00:00