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authorAlex Shi <alex.shi@intel.com>2012-08-24 08:55:13 +0000
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2012-09-05 10:50:21 -0400
commitce7184bdbd38d920fb515266fbbdc585ad2e5493 (patch)
tree0f9f9fae086368925f6cf4f3053cb1ea92a5adca /arch
parent593d0a3e9f813db910dc50574532914db21d09ff (diff)
downloadlinux-linaro-stable-ce7184bdbd38d920fb515266fbbdc585ad2e5493.tar.gz
xen: fix logical error in tlb flushing
While TLB_FLUSH_ALL gets passed as 'end' argument to flush_tlb_others(), the Xen code was made to check its 'start' parameter. That may give a incorrect op.cmd to MMUEXT_INVLPG_MULTI instead of MMUEXT_TLB_FLUSH_MULTI. Then it causes some page can not be flushed from TLB. This patch fixed this issue. Reported-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Alex Shi <alex.shi@intel.com> Acked-by: Jan Beulich <jbeulich@suse.com> Tested-by: Yongjie Ren <yongjie.ren@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/xen/mmu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index b65a76133f4f..5141d808e751 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1283,7 +1283,7 @@ static void xen_flush_tlb_others(const struct cpumask *cpus,
cpumask_clear_cpu(smp_processor_id(), to_cpumask(args->mask));
args->op.cmd = MMUEXT_TLB_FLUSH_MULTI;
- if (start != TLB_FLUSH_ALL && (end - start) <= PAGE_SIZE) {
+ if (end != TLB_FLUSH_ALL && (end - start) <= PAGE_SIZE) {
args->op.cmd = MMUEXT_INVLPG_MULTI;
args->op.arg1.linear_addr = start;
}