linux/arch/x86/xen
Jeremy Fitzhardinge 06fc732c33 xen: disable interrupts before saving in percpu
Impact: Fix race condition

xen_mc_batch has a small preempt race where it takes the address of a
percpu variable immediately before disabling interrupts, thereby
leaving a small window in which we may migrate to another cpu and save
the flags in the wrong percpu variable.  Disable interrupts before
saving the old flags in a percpu.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-02-03 17:22:40 -08:00
..
Kconfig xen: make CONFIG_XEN_SAVE_RESTORE depend on CONFIG_XEN 2008-09-30 09:58:05 +02:00
Makefile ftrace: rename FTRACE to FUNCTION_TRACER 2008-10-20 18:27:03 +02:00
debugfs.c xen: add debugfs support 2008-08-21 13:52:58 +02:00
debugfs.h xen: add debugfs support 2008-08-21 13:52:58 +02:00
enlighten.c xen: clean up asm/xen/hypervisor.h 2008-12-16 21:50:31 +01:00
grant-table.c xen: make grant table arch portable 2008-04-24 23:57:32 +02:00
irq.c xen: Fix bug `do_IRQ: cannot handle IRQ -1 vector 0x6 cpu 1' 2008-10-16 16:52:58 +02:00
mmu.c Merge branch 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-01-02 11:44:09 -08:00
mmu.h xen: use spin_lock_nest_lock when pinning a pagetable 2008-10-09 14:25:19 +02:00
multicalls.c xen: whitespace/checkpatch cleanup 2008-12-16 21:05:01 +01:00
multicalls.h xen: disable interrupts before saving in percpu 2009-02-03 17:22:40 -08:00
setup.c xen: whitespace/checkpatch cleanup 2008-12-16 21:05:01 +01:00
smp.c x86: cosmetic changes apic-related files. 2008-12-16 17:40:57 -08:00
spinlock.c genirq: revert dynarray 2008-10-16 16:53:15 +02:00
suspend.c xen: convert to cpumask_var_t and new cpumask primitives. 2008-12-16 17:40:57 -08:00
time.c Merge branch 'cputime' of git://git390.osdl.marist.edu/pub/scm/linux-2.6 2009-01-03 11:56:24 -08:00
vdso.h i386: move xen 2007-10-11 11:16:51 +02:00
xen-asm_32.S xen: compile irq functions without -pg for ftrace 2008-07-31 12:39:39 +02:00
xen-asm_64.S xen: clean up x86-64 warnings 2008-10-03 10:04:10 +02:00
xen-head.S xen64: add xen-head code to head_64.S 2008-07-16 10:58:41 +02:00
xen-ops.h xen: convert to cpumask_var_t and new cpumask primitives. 2008-12-16 17:40:57 -08:00