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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2009-02-04 01:01:46 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-02-04 02:22:40 +0100 |
| commit | 06fc732c33a7ff5e4c91bcf4a6ca86b5e335ad9a (patch) | |
| tree | eb6a202f5bc01a5c8ac9f7245b9097f18ac44e57 /drivers/serial/Kconfig | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jba... (diff) | |
| download | linux-06fc732c33a7ff5e4c91bcf4a6ca86b5e335ad9a.tar.xz linux-06fc732c33a7ff5e4c91bcf4a6ca86b5e335ad9a.zip | |
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>
Diffstat (limited to 'drivers/serial/Kconfig')
0 files changed, 0 insertions, 0 deletions