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Liu, Jinsong a867e5d6b3 xen/mce: add .poll method for mcelog device driver 
If a driver leaves its poll method NULL, the device is assumed to
be both readable and writable without blocking.

This patch add .poll method to xen mcelog device driver, so that
when mcelog use system calls like ppoll or select, it would be
blocked when no data available, and avoid spinning at CPU.

Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-07-19 15:51:41 -04:00
..
xen-pciback Two fixes for regressions: 2012-04-06 17:54:53 -07:00
xenbus Features: 2012-05-24 16:02:08 -07:00
xenfs xen: Add xenbus device driver 2011-12-16 13:29:39 -05:00
acpi.c xen/acpi/sleep: Enable ACPI sleep via the __acpi_os_prepare_sleep 2012-05-07 15:33:18 -04:00
balloon.c xen/balloon: Avoid OOM when requesting highmem 2011-11-16 12:13:43 -05:00
biomerge.c xen: using EXPORT_SYMBOL requires including export.h 2012-01-18 15:37:49 -08:00
cpu_hotplug.c xen/bootup: During bootup suppress XENBUS: Unable to read cpu state 2012-02-03 16:05:30 -05:00
events.c Five bug-fixes: 2012-06-15 17:17:15 -07:00
evtchn.c xen/event: Add reference counting to event channels 2011-11-21 17:14:48 -05:00
features.c xen: clean up asm/xen/hypervisor.h 2008-12-16 21:50:31 +01:00
gntalloc.c xen-gntalloc: introduce missing kfree 2012-01-03 13:39:04 -05:00
gntdev.c xen/gntdev: do not set VM_PFNMAP 2012-04-17 13:27:17 -04:00
grant-table.c Features: 2012-05-24 16:02:08 -07:00
Kconfig xen/mce: Add mcelog support for Xen platform 2012-07-19 15:51:36 -04:00
Makefile xen/pcpu: Xen physical cpus online/offline sys interface 2012-07-19 15:51:39 -04:00
manage.c xen/resume: Fix compile warnings. 2012-04-19 15:12:49 -04:00
mcelog.c xen/mce: add .poll method for mcelog device driver 2012-07-19 15:51:41 -04:00
pci.c xen/pci: Check for PCI bridge before using it. 2012-05-30 10:16:35 -04:00
pcpu.c xen/pcpu: Xen physical cpus online/offline sys interface 2012-07-19 15:51:39 -04:00
platform-pci.c xen: initialize platform-pci even if xen_emul_unplug=never 2012-03-22 11:37:11 -04:00
privcmd.c xen/privcmd: Remove unused support for arch specific privcmp mmap 2011-12-16 13:29:42 -05:00
privcmd.h xen: Add privcmd device driver 2011-12-16 13:29:31 -05:00
swiotlb-xen.c X86 & IA64: adapt for dma_map_ops changes 2012-03-28 16:36:31 +02:00
sys-hypervisor.c xen: constify all instances of "struct attribute_group" 2012-03-14 12:34:19 -04:00
tmem.c frontswap: s/put_page/store/g s/get_page/load 2012-05-15 11:34:08 -04:00
xen-acpi-processor.c xen-acpi-processor: Add missing #include <xen/xen.h> 2012-05-17 10:03:02 -07:00
xen-balloon.c Features: 2012-03-22 20:16:14 -07:00
xen-selfballoon.c xen: Add selfballoning memory reservation tunable. 2012-05-21 10:52:53 -04:00
xencomm.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00