[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>
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 5930e87..9bbd0bf6 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -973,12 +973,15 @@
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;