[patch 37/45] x86, uv: fix cpumask iterator in uv_bau_init()

[Chris Wright]

-stable review patch.  If anyone has any objections, please let us know.
---------------------

From: Rusty Russell <rusty@xxxxxxxxxxxxxxx>

upstream commit: 2c74d66624ddbda8101d54d1e184cf9229b378bc

Impact: fix boot crash on UV systems

Commit 76ba0ecda0de9accea9a91cb6dbde46782110e1c "cpumask: use
cpumask_var_t in uv_flush_tlb_others" used cur_cpu as an iterator;
it was supposed to be zero for the code below it.

Reported-by: Cliff Wickman <cpw@xxxxxxx>
Original-From: Cliff Wickman <cpw@xxxxxxx>
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Acked-by: Mike Travis <travis@xxxxxxx>
Cc: steiner@xxxxxxx
Cc: <stable@xxxxxxxxxx>
LKML-Reference: <200903180822.31196.rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
---
 arch/x86/kernel/tlb_uv.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/arch/x86/kernel/tlb_uv.c
+++ b/arch/x86/kernel/tlb_uv.c
@@ -742,7 +742,7 @@ static int __init uv_bau_init(void)
 	int node;
 	int nblades;
 	int last_blade;
-	int cur_cpu = 0;
+	int cur_cpu;
 
 	if (!is_uv_system())
 		return 0;
@@ -752,6 +752,7 @@ static int __init uv_bau_init(void)
 	uv_mmask = (1UL << uv_hub_info->n_val) - 1;
 	nblades = 0;
 	last_blade = -1;
+	cur_cpu = 0;
 	for_each_online_node(node) {
 		blade = uv_node_to_blade_id(node);
 		if (blade == last_blade)

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