Don't use undefined preprocessor symbols in expressions.

9630291c · Linus Torvalds · 80d8187e · 9630291c
Commit 9630291c authored May 12, 2003 by Linus Torvalds
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mm/page_alloc.c mm/page_alloc.c +1 -1

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--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -792,7 +792,7 @@ unsigned int nr_free_pagecache_pages(void)
 	return nr_free_zone_pages(GFP_HIGHUSER & GFP_ZONEMASK);
 }
-#if CONFIG_HIGHMEM
+#ifdef CONFIG_HIGHMEM
 unsigned int nr_free_highpages (void)
 {
 	pg_data_t *pgdat;