---

yaml --- r: 22477 b: refs/heads/master c: 6626c5d h: refs/heads/master i: 22475: 2914947 v: v3
git-mirror · Mar 22, 2006 · ba40086 · ba40086
1 parent e16f539
commit ba40086
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 17cf44064ae744f081309108fa67f0e942b10167
+refs/heads/master: 6626c5d53bc45c59798628677ba5606f02e371f3
diff --git a/trunk/mm/page_alloc.c b/trunk/mm/page_alloc.c
@@ -217,6 +217,11 @@ static inline void prep_zero_page(struct page *page, int order, gfp_t gfp_flags)
 	int i;
 
 	BUG_ON((gfp_flags & (__GFP_WAIT | __GFP_HIGHMEM)) == __GFP_HIGHMEM);
+	/*
+	 * clear_highpage() will use KM_USER0, so it's a bug to use __GFP_ZERO
+	 * and __GFP_HIGHMEM from hard or soft interrupt context.
+	 */
+	BUG_ON((gfp_flags & __GFP_HIGHMEM) && in_interrupt());
 	for (i = 0; i < (1 << order); i++)
 		clear_highpage(page + i);
 }