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yaml --- r: 88338 b: refs/heads/master c: bead9a3 h: refs/heads/master v: v3
git-mirror · Apr 16, 2008 · 7e9db10 · 7e9db10
1 parent 4d58746
commit 7e9db10
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Showing 2 changed files with 11 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: cf39cc3b56bc4a562db6242d3069f65034ec7549
+refs/heads/master: bead9a3abd15710b0bdfd418daef606722d86282
diff --git a/trunk/mm/sparse.c b/trunk/mm/sparse.c
@@ -149,8 +149,18 @@ static inline int sparse_early_nid(struct mem_section *section)
 /* Record a memory area against a node. */
 void __init memory_present(int nid, unsigned long start, unsigned long end)
 {
+	unsigned long max_arch_pfn = 1UL << (MAX_PHYSMEM_BITS-PAGE_SHIFT);
 	unsigned long pfn;
 
+	/*
+	 * Sanity checks - do not allow an architecture to pass
+	 * in larger pfns than the maximum scope of sparsemem:
+	 */
+	if (start >= max_arch_pfn)
+		return;
+	if (end >= max_arch_pfn)
+		end = max_arch_pfn;
+
 	start &= PAGE_SECTION_MASK;
 	for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION) {
 		unsigned long section = pfn_to_section_nr(pfn);