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Diffstat (limited to 'include/linux/page-flags.h')
-rw-r--r--include/linux/page-flags.h26
1 files changed, 9 insertions, 17 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index b12f93a3c345..219a523ecdb0 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -228,6 +228,7 @@ PAGEFLAG_FALSE(HighMem)
PAGEFLAG(SwapCache, swapcache)
#else
PAGEFLAG_FALSE(SwapCache)
+ SETPAGEFLAG_NOOP(SwapCache) CLEARPAGEFLAG_NOOP(SwapCache)
#endif
#ifdef CONFIG_UNEVICTABLE_LRU
@@ -372,31 +373,22 @@ static inline void __ClearPageTail(struct page *page)
#define __PG_MLOCKED 0
#endif
-#define PAGE_FLAGS (1 << PG_lru | 1 << PG_private | 1 << PG_locked | \
- 1 << PG_buddy | 1 << PG_writeback | \
- 1 << PG_slab | 1 << PG_swapcache | 1 << PG_active | \
- __PG_UNEVICTABLE | __PG_MLOCKED)
-
-/*
- * Flags checked in bad_page(). Pages on the free list should not have
- * these flags set. It they are, there is a problem.
- */
-#define PAGE_FLAGS_CLEAR_WHEN_BAD (PAGE_FLAGS | \
- 1 << PG_reclaim | 1 << PG_dirty | 1 << PG_swapbacked)
-
/*
* Flags checked when a page is freed. Pages being freed should not have
* these flags set. It they are, there is a problem.
*/
-#define PAGE_FLAGS_CHECK_AT_FREE (PAGE_FLAGS | 1 << PG_reserved)
+#define PAGE_FLAGS_CHECK_AT_FREE \
+ (1 << PG_lru | 1 << PG_private | 1 << PG_locked | \
+ 1 << PG_buddy | 1 << PG_writeback | 1 << PG_reserved | \
+ 1 << PG_slab | 1 << PG_swapcache | 1 << PG_active | \
+ __PG_UNEVICTABLE | __PG_MLOCKED)
/*
* Flags checked when a page is prepped for return by the page allocator.
- * Pages being prepped should not have these flags set. It they are, there
- * is a problem.
+ * Pages being prepped should not have any flags set. It they are set,
+ * there has been a kernel bug or struct page corruption.
*/
-#define PAGE_FLAGS_CHECK_AT_PREP (PAGE_FLAGS | \
- 1 << PG_reserved | 1 << PG_dirty | 1 << PG_swapbacked)
+#define PAGE_FLAGS_CHECK_AT_PREP ((1 << NR_PAGEFLAGS) - 1)
#endif /* !__GENERATING_BOUNDS_H */
#endif /* PAGE_FLAGS_H */