acrn-kernel/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
Makefile
debugfs.c
debugfs.h
enlighten.c xen: clean up asm/xen/hypervisor.h 2008-12-16 21:50:31 +01:00
grant-table.c
irq.c
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
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
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
xen-asm_32.S
xen-asm_64.S
xen-head.S
xen-ops.h xen: convert to cpumask_var_t and new cpumask primitives. 2008-12-16 17:40:57 -08:00