From f7c00338cfeef125032aa12aa8ebeacf9e117e81 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@sunset.davemloft.net>
Date: Sun, 5 Mar 2006 22:18:50 -0800
Subject: [PATCH] [SPARC64]: Fix loop termination in mark_kpte_bitmap()
If we were aligned, but didn't have at least 256MB left
to process, we would loop forever.
Thanks to fabbione for the report and testing the fix.
Signed-off-by: David S. Miller <davem@davemloft.net>
---
arch/sparc64/mm/init.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 5930e87dafbc32..9bbd0bf64af0f4 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -973,12 +973,15 @@ static void __init mark_kpte_bitmap(unsigned long start, unsigned long end)
while (start < end) {
long remains;
+ remains = end - start;
+ if (remains < size_256MB)
+ break;
+
if (start & mask_256MB) {
start = (start + size_256MB) & ~mask_256MB;
continue;
}
- remains = end - start;
while (remains >= size_256MB) {
unsigned long index = start >> shift_256MB;
--
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