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authorJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-03-04 17:36:57 -0800
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2009-04-08 14:25:46 -0700
commite3f8a74e3a884b91a4390c66ed8175ef74db7067 (patch)
treec0a891e10c9ab2ab3726228a8cbc4c868a997737 /arch/x86/xen
parentb96229b50d71c548302053c244b89572a5264c0b (diff)
downloadblackbird-op-linux-e3f8a74e3a884b91a4390c66ed8175ef74db7067.tar.gz
blackbird-op-linux-e3f8a74e3a884b91a4390c66ed8175ef74db7067.zip
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 4db24e1393a2..7ef880c51dca 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1302,8 +1302,8 @@ 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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