write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/include/linux/page-flags-layout.h
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@@ -77,7 +77,7 @@
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 #define LAST_CPUPID_SHIFT 0
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 #endif
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-#ifdef CONFIG_KASAN_SW_TAGS
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+#if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS)
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 #define KASAN_TAG_WIDTH 8
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 #else
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 #define KASAN_TAG_WIDTH 0
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@@ -98,9 +98,11 @@
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 /*
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  * We are going to use the flags for the page to node mapping if its in
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  * there.  This includes the case where there is no node, so it is implicit.
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+ * Note that this #define MUST have a value so that it can be tested with
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+ * the IS_ENABLED() macro.
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  */
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 #if !(NODES_WIDTH > 0 || NODES_SHIFT == 0)
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-#define NODE_NOT_IN_PAGE_FLAGS
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+#define NODE_NOT_IN_PAGE_FLAGS 1
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 #endif
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 #if defined(CONFIG_NUMA_BALANCING) && LAST_CPUPID_WIDTH == 0