linux/drivers/xen
David Vrabel 581d21a2d0 xenbus: fix deadlock on writes to /proc/xen/xenbus
/proc/xen/xenbus does not work correctly.  A read blocked waiting for
a xenstore message holds the mutex needed for atomic file position
updates.  This blocks any writes on the same file handle, which can
deadlock if the write is needed to unblock the read.

Clear FMODE_ATOMIC_POS when opening this device to always get
character device like sematics.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
2016-12-12 15:22:13 +01:00
..
events xen/events: use xen_vcpu_id mapping for EVTCHNOP_status 2016-11-30 07:39:09 +01:00
xen-pciback xen: make use of xenbus_read_unsigned() in xen-pciback 2016-11-07 13:55:34 +01:00
xenbus xenbus: fix deadlock on writes to /proc/xen/xenbus 2016-12-12 15:22:13 +01:00
xenfs xen: audit usages of module.h ; remove unnecessary instances 2016-03-21 15:13:32 +00:00
acpi.c xen: rename dom0_op to platform_op 2015-12-21 14:40:55 +00:00
arm-device.c Xen: ARM: Add support for mapping AMBA device mmio 2016-07-06 10:34:43 +01:00
balloon.c xen/balloon: Fix declared-but-not-defined warning 2016-06-23 11:36:15 +01:00
biomerge.c xen/biomerge: Don't allow biovec's to be merged when Linux is not using 4KB pages 2015-10-23 14:20:36 +01:00
cpu_hotplug.c xen, cpu_hotplug: call device_offline instead of cpu_down 2015-10-23 14:20:48 +01:00
dbgp.c xen: Use dev_is_pci() to check whether it is pci device 2014-01-07 09:53:33 -05:00
efi.c XEN: EFI: Move x86 specific codes to architecture directory 2016-07-06 10:34:46 +01:00
evtchn.c xen/evtchn: use xen_vcpu_id mapping 2016-07-25 13:34:18 +01:00
fallback.c
features.c xen: audit usages of module.h ; remove unnecessary instances 2016-03-21 15:13:32 +00:00
gntalloc.c xen: set error code on failures 2016-12-08 07:53:50 +01:00
gntdev.c xen/gntdev: Use VM_MIXEDMAP instead of VM_IO to avoid NUMA balancing 2016-11-28 14:14:05 +01:00
grant-table.c xen: audit usages of module.h ; remove unnecessary instances 2016-03-21 15:13:32 +00:00
Kconfig ARM64: XEN: Add a function to initialize Xen specific UEFI runtime services 2016-07-06 10:34:46 +01:00
Makefile Xen: ARM: Add support for mapping platform device mmio 2016-07-06 10:34:43 +01:00
manage.c xenbus: advertise control feature flags 2016-10-24 15:48:40 +01:00
mcelog.c xen/mce: fix up xen_late_init_mcelog() error handling 2015-03-16 14:49:15 +00:00
pci.c xen/pci: Try harder to get PXM information for Xen 2015-04-15 10:57:28 +01:00
pcpu.c xen: rename dom0_op to platform_op 2015-12-21 14:40:55 +00:00
platform-pci.c xen-platform: use builtin_pci_driver 2016-11-17 13:44:26 +01:00
preempt.c xen/preempt: use need_resched() instead of should_resched() 2015-08-20 12:24:14 +01:00
privcmd.c xen: use vma_pages(). 2016-07-06 10:34:47 +01:00
privcmd.h
swiotlb-xen.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
sys-hypervisor.c xen: rename xen_pmu_init() in sys-hypervisor.c 2016-08-24 18:45:25 +01:00
time.c xen: add static initialization of steal_clock op to xen_time_ops 2016-07-26 14:07:06 +01:00
tmem.c cleancache: constify cleancache_ops structure 2016-01-27 09:09:57 -05:00
xen-acpi-cpuhotplug.c xen: rename dom0_op to platform_op 2015-12-21 14:40:55 +00:00
xen-acpi-memhotplug.c ACPICA: Resources: Provide common part for struct acpi_resource_address structures. 2015-01-26 16:09:56 +01:00
xen-acpi-pad.c xen: rename dom0_op to platform_op 2015-12-21 14:40:55 +00:00
xen-acpi-processor.c xen/acpi: allow xen-acpi-processor driver to load on Xen 4.7 2016-07-08 14:53:13 +01:00
xen-balloon.c drivers/xen: make [xen-]ballon explicitly non-modular 2016-03-21 15:13:44 +00:00
xen-scsiback.c target: make close_session optional 2016-05-10 01:19:26 -07:00
xen-selfballoon.c mm, frontswap: convert frontswap_enabled to static key 2016-07-26 16:19:19 -07:00
xen-stub.c
xlate_mmu.c Xen: xlate: Use page_to_xen_pfn instead of page_to_pfn 2016-07-06 10:34:42 +01:00