Konrad Rzeszutek Wilk 7736594836 xen/irq: Alter the locking to use a mutex instead of a spinlock. ... When we allocate/change the IRQ informations, we do not need to use spinlocks. We can use a mutex (which is what the generic IRQ code does for allocations/changes). Fixes a slew of: BUG: sleeping function called from invalid context at /linux/kernel/mutex.c:271 in_atomic(): 1, irqs_disabled(): 0, pid: 3216, name: xenstored 2 locks held by xenstored/3216: #0: (&u->bind_mutex){......}, at: [<ffffffffa02e0920>] evtchn_ioctl+0x30/0x3a0 [xen_evtchn] #1: (irq_mapping_update_lock){......}, at: [<ffffffff8138b274>] bind_evtchn_to_irq+0x24/0x90 Pid: 3216, comm: xenstored Not tainted 3.1.0-rc6-00021-g437a3d1 #2 Call Trace: [<ffffffff81088d10>] __might_sleep+0x100/0x130 [<ffffffff81645c2f>] mutex_lock_nested+0x2f/0x50 [<ffffffff81627529>] __irq_alloc_descs+0x49/0x200 [<ffffffffa02e0920>] ? evtchn_ioctl+0x30/0x3a0 [xen_evtchn] [<ffffffff8138b214>] xen_allocate_irq_dynamic+0x34/0x70 [<ffffffff8138b2ad>] bind_evtchn_to_irq+0x5d/0x90 [<ffffffffa02e03c0>] ? evtchn_bind_to_user+0x60/0x60 [xen_evtchn] [<ffffffff8138c282>] bind_evtchn_to_irqhandler+0x32/0x80 [<ffffffffa02e03a9>] evtchn_bind_to_user+0x49/0x60 [xen_evtchn] [<ffffffffa02e0a34>] evtchn_ioctl+0x144/0x3a0 [xen_evtchn] [<ffffffff811b4070>] ? vfsmount_lock_local_unlock+0x50/0x80 [<ffffffff811a6a1a>] do_vfs_ioctl+0x9a/0x5e0 [<ffffffff811b476f>] ? mntput+0x1f/0x30 [<ffffffff81196259>] ? fput+0x199/0x240 [<ffffffff811a7001>] sys_ioctl+0xa1/0xb0 [<ffffffff8164ea82>] system_call_fastpath+0x16/0x1b Reported-by: Jim Burns <jim_burn@bellsouth.net> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>		2011-09-15 04:32:02 -04:00
..
xen-pciback	xen/pciback: remove duplicated #include	2011-08-03 14:34:52 -04:00
xenbus	xen: Add module alias to autoload backend drivers	2011-06-30 12:15:33 -04:00
xenfs
balloon.c	xen/balloon: memory hotplug support for Xen balloon driver	2011-07-25 20:57:08 -07:00
biomerge.c
cpu_hotplug.c
events.c	xen/irq: Alter the locking to use a mutex instead of a spinlock.	2011-09-15 04:32:02 -04:00
evtchn.c
features.c
gntalloc.c
gntdev.c
grant-table.c	xen/grant: Fix compile warning.	2011-08-03 14:34:53 -04:00
Kconfig	xen/self-balloon: Add dependency on tmem.	2011-08-03 14:34:57 -04:00
Makefile	Merge branch 'stable/xen-pciback-0.6.3' into stable/drivers	2011-07-20 15:33:51 -04:00
manage.c
pci.c
platform-pci.c
swiotlb-xen.c	Merge branch 'stable/xen-swiotlb.bugfix' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb-2.6	2011-06-09 12:52:44 -07:00
sys-hypervisor.c
tmem.c	xen: prepare tmem shim to handle frontswap	2011-06-17 15:06:20 -06:00
xen-balloon.c	xen: tmem: self-ballooning and frontswap-selfshrinking	2011-07-08 12:26:21 -06:00
xen-selfballoon.c	xen: xen-selfballoon.c needs more header files	2011-08-10 15:21:46 -04:00
xencomm.c