arm: handle discontig page struct between sections
If SPARSEMEM is enabled and there is a large amount of
memory, the page structures for the various sections
may not be contiguous. The code to traverse all of the
page structures in show_mem() was incorrectly assuming
all of the page structures were contiguous, causing
kernel panics in this case.
CRs-fixed: 315006
Change-Id: I5e9437c369d23f1513c73feb46623006561d15cf
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index ca501ef..7cd02ff 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -121,7 +121,14 @@
else
shared += page_count(page) - 1;
page++;
+#ifdef CONFIG_SPARSEMEM
+ pfn1++;
+ if (!(pfn1 % PAGES_PER_SECTION))
+ page = pfn_to_page(pfn1);
+ } while (pfn1 < pfn2);
+#else
} while (page < end);
+#endif
}
printk("%d pages of RAM\n", total);