linux/kernel
Paolo 'Blaisorblade' Giarrusso dbce706e25 [PATCH] uml: add and use generic hw_controller_type->release
With Chris Wedgwood <cw@f00f.org>

Currently UML must explicitly call the UML-specific
free_irq_by_irq_and_dev() for each free_irq call it's done.

This is needed because ->shutdown and/or ->disable are only called when the
last "action" for that irq is removed.

Instead, for UML shared IRQs (UML IRQs are very often, if not always,
shared), for each dev_id some setup is done, which must be cleared on the
release of that fd.  For instance, for each open console a new instance
(i.e.  new dev_id) of the same IRQ is requested().

Exactly, a fd is stored in an array (pollfds), which is after read by a
host thread and passed to poll().  Each event registered by poll() triggers
an interrupt.  So, for each free_irq() we must remove the corresponding
host fd from the table, which we do via this -release() method.

In this patch we add an appropriate hook for this, and remove all uses of
it by pointing the hook to the said procedure; this is safe to do since the
said procedure.

Also some cosmetic improvements are included.

This is heavily based on some work by Chris Wedgwood, which however didn't
get the patch merged for something I'd call a "misunderstanding" (the need
for this patch wasn't cleanly explained, thus adding the generic hook was
felt as undesirable).

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
CC: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-21 19:07:32 -07:00
..
irq [PATCH] uml: add and use generic hw_controller_type->release 2005-06-21 19:07:32 -07:00
power [PATCH] smp_processor_id() cleanup 2005-06-21 18:46:13 -07:00
acct.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
audit.c AUDIT: Unify auid reporting, put arch before syscall number 2005-05-23 21:35:28 +01:00
auditsc.c AUDIT: Record working directory when syscall arguments are pathnames 2005-05-27 12:17:28 +01:00
capability.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
compat.c [PATCH] Fix get_compat_sigevent() 2005-04-16 15:24:01 -07:00
configs.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cpu.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cpuset.c [PATCH] cpuset exit NULL dereference fix 2005-05-27 08:07:26 -07:00
dma.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
exec_domain.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
exit.c [PATCH] timer exit cleanup 2005-06-17 10:03:50 -07:00
extable.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
fork.c [PATCH] dup_mmap: update comment on new vma 2005-06-21 18:46:19 -07:00
futex.c [PATCH] convert that currently tests _NSIG directly to use valid_signal() 2005-05-01 08:59:14 -07:00
intermodule.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
itimer.c [PATCH] setitimer timer expires too early 2005-05-05 16:36:41 -07:00
kallsyms.c [PATCH] ppc32: platform-specific functions missing from kallsyms. 2005-05-05 16:36:31 -07:00
kfifo.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
kmod.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
kprobes.c [PATCH] kprobes: Allow multiple kprobes at the same address 2005-05-05 16:36:39 -07:00
ksysfs.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
kthread.c [PATCH] use smp_mb/wmb/rmb where possible 2005-05-01 08:58:47 -07:00
Makefile [PATCH] ppc64: remove hidden -fno-omit-frame-pointer for schedule.c 2005-05-05 16:36:32 -07:00
module.c [PATCH] smp_processor_id() cleanup 2005-06-21 18:46:13 -07:00
panic.c [SPARC]: Stop-A printk cleanup 2005-04-24 20:38:02 -07:00
params.c [PATCH] sysfs: (rest) if show/store is missing return -EIO 2005-06-20 15:15:03 -07:00
pid.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
posix-cpu-timers.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
posix-timers.c [PATCH] timer exit cleanup 2005-06-17 10:03:50 -07:00
printk.c [PATCH] add_preferred_console() build fix 2005-05-17 07:59:19 -07:00
profile.c [PATCH] profile.c: `schedule' parsing fix 2005-05-17 07:59:21 -07:00
ptrace.c [PATCH] convert that currently tests _NSIG directly to use valid_signal() 2005-05-01 08:59:14 -07:00
rcupdate.c [PATCH] Deprecate synchronize_kernel, GPL replacement 2005-05-01 08:59:04 -07:00
resource.c [PATCH] pci enumeration on ixp2000: overflow in kernel/resource.c 2005-04-16 15:25:58 -07:00
sched.c [PATCH] smp_processor_id() cleanup 2005-06-21 18:46:13 -07:00
seccomp.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
signal.c Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.git 2005-06-02 16:39:11 +01:00
softirq.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
spinlock.c [PATCH] spin_unlock_bh() and preempt_check_resched() 2005-05-21 10:46:48 -07:00
stop_machine.c [PATCH] smp_processor_id() cleanup 2005-06-21 18:46:13 -07:00
sys_ni.c [PATCH] VM: early zone reclaim 2005-06-21 18:46:14 -07:00
sys.c [PATCH] correctly name the Shell sort 2005-05-05 16:36:50 -07:00
sysctl.c [PATCH] DocBook: fix some descriptions 2005-05-01 08:59:26 -07:00
time.c [PATCH] time interpolator: Fix settimeofday inaccuracy 2005-04-28 08:13:58 -07:00
timer.c [PATCH] use smp_mb/wmb/rmb where possible 2005-05-01 08:58:47 -07:00
uid16.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
user.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
wait.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
workqueue.c [PATCH] re-export cancel_rearming_delayed_workqueue 2005-04-16 15:23:59 -07:00