[patch] mm: page_alloc less atomics (resend)

[patch] mm: page_alloc less atomics (resend)

[Nick Piggin]

Oops, forgot to cc linux-mm

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More atomic operation removal from page allocator

Signed-off-by: Nick Piggin <npiggin@suse.de>

Index: linux-2.6/include/linux/page-flags.h
===================================================================
--- linux-2.6.orig/include/linux/page-flags.h
+++ linux-2.6/include/linux/page-flags.h
@@ -331,8 +331,8 @@ extern void __mod_page_state_offset(unsi
 #define TestClearPageReclaim(page) test_and_clear_bit(PG_reclaim, &(page)->flags)
 
 #define PageCompound(page)	test_bit(PG_compound, &(page)->flags)
-#define SetPageCompound(page)	set_bit(PG_compound, &(page)->flags)
-#define ClearPageCompound(page)	clear_bit(PG_compound, &(page)->flags)
+#define __SetPageCompound(page)	__set_bit(PG_compound, &(page)->flags)
+#define __ClearPageCompound(page) __clear_bit(PG_compound, &(page)->flags)
 
 #ifdef CONFIG_SWAP
 #define PageSwapCache(page)	test_bit(PG_swapcache, &(page)->flags)
Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c
+++ linux-2.6/mm/page_alloc.c
@@ -189,7 +189,7 @@ static void prep_compound_page(struct pa
 	for (i = 0; i < nr_pages; i++) {
 		struct page *p = page + i;
 
-		SetPageCompound(p);
+		__SetPageCompound(p);
 		set_page_private(p, (unsigned long)page);
 	}
 }
@@ -208,7 +208,7 @@ static void destroy_compound_page(struct
 		if (unlikely(!PageCompound(p) |
 				(page_private(p) != (unsigned long)page)))
 			bad_page(page);
-		ClearPageCompound(p);
+		__ClearPageCompound(p);
 	}
 }
 

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