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linux/arch/x86/xen
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Andrea Arcangeli a79e53d856 x86/mm: Fix pgd_lock deadlock 
It's forbidden to take the page_table_lock with the irq disabled
or if there's contention the IPIs (for tlb flushes) sent with
the page_table_lock held will never run leading to a deadlock.

Nobody takes the pgd_lock from irq context so the _irqsave can be
removed.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@kernel.org>
LKML-Reference: <201102162345.p1GNjMjm021738@imap1.linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-03-10 09:41:57 +01:00
..
debugfs.c llseek: automatically add .llseek fop 2010-10-15 15:53:27 +02:00
debugfs.h xen: add debugfs support 2008-08-21 13:52:58 +02:00
enlighten.c lockdep: Move early boot local IRQ enable/disable status to init/main.c 2011-01-20 13:32:33 +01:00
grant-table.c
irq.c xen: fix non-ANSI function warning in irq.c 2011-01-20 14:52:13 -05:00
Kconfig Merge branch 'stable/xen-pcifront-0.8.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2010-10-28 17:11:17 -07:00
Makefile xen: move p2m handling to separate file 2011-01-11 14:31:07 -05:00
mmu.c x86/mm: Fix pgd_lock deadlock 2011-03-10 09:41:57 +01:00
mmu.h xen: make install_p2mtop_page() static 2010-10-22 12:57:23 -07:00
multicalls.c x86, xen: do multicall callbacks with interrupts disabled 2009-02-16 08:56:41 +01:00
multicalls.h xen: Use this_cpu_ops 2010-12-17 15:07:19 +01:00
p2m.c xen/p2m: Mark INVALID_P2M_ENTRY the mfn_list past max_pfn. 2011-01-27 10:49:34 -05:00
pci-swiotlb-xen.c Merge branch 'stable/xen-pcifront-0.8.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2010-10-28 17:11:17 -07:00
platform-pci-unplug.c xen: unplug the emulated devices at resume time 2010-12-02 14:40:53 +00:00
setup.c xen/setup: Route halt operations to safe_halt pvop. 2011-01-27 12:00:24 -05:00
smp.c Merge branch 'stable/xen-pcifront-0.8.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2010-10-28 17:11:17 -07:00
spinlock.c xen: Use this_cpu_ops 2010-12-17 15:07:19 +01:00
suspend.c xen: unplug the emulated devices at resume time 2010-12-02 14:40:53 +00:00
time.c Merge branch 'this_cpu_ops' into for-2.6.38 2010-12-17 15:16:46 +01:00
vdso.h
xen-asm_32.S percpu: remove per_cpu__ prefix. 2009-10-29 22:34:15 +09:00
xen-asm_64.S xen: use iret for return from 64b kernel to 32b usermode 2009-12-03 11:14:54 -08:00
xen-asm.h xen: make direct versions of irq_enable/disable/save/restore to common code 2009-02-04 16:59:04 -08:00
xen-asm.S x86: style cleanups for xen assemblies 2009-02-05 20:25:41 +01:00
xen-head.S x86: use _types.h headers in asm where available 2009-02-13 11:35:01 -08:00
xen-ops.h xen: unplug the emulated devices at resume time 2010-12-02 14:40:53 +00:00