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authorJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-03-04 17:36:57 -0800
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-03-30 09:25:34 -0700
commit8de07bbdede03598801cf33ab23dcbcd28a918d2 (patch)
tree9caf7228d87561b411e0057c0a4b9107fc416ee2 /arch/x86/xen
parent4185f35404dc96f8525298c7c548aee419f3b3f4 (diff)
downloadop-kernel-dev-8de07bbdede03598801cf33ab23dcbcd28a918d2.zip
op-kernel-dev-8de07bbdede03598801cf33ab23dcbcd28a918d2.tar.gz
xen/mmu: weaken flush_tlb_other test
Impact: fixes crashing bug There's no particular problem with getting an empty cpu mask, so just shortcut-return if we get one. Avoids crash reported by Christophe Saout <christophe@saout.de> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'arch/x86/xen')
-rw-r--r--arch/x86/xen/mmu.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index df87c80..e425a32 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1293,8 +1293,8 @@ static void xen_flush_tlb_others(const struct cpumask *cpus,
} *args;
struct multicall_space mcs;
- BUG_ON(cpumask_empty(cpus));
- BUG_ON(!mm);
+ if (cpumask_empty(cpus))
+ return; /* nothing to do */
mcs = xen_mc_entry(sizeof(*args));
args = mcs.args;
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