From: Hugh Dickins <hugh@veritas.com>
anobjrmap 2/6 create include/linux/rmap.h
Start small: linux/rmap-locking.h has already gathered some
declarations unrelated to locking, then the rest of the rmap
declarations were over in linux/swap.h: gather them all
together in linux/rmap.h.
diff -upN reference/fs/exec.c current/fs/exec.c
--- reference/fs/exec.c 2004-03-31 12:04:36.000000000 -0800
+++ current/fs/exec.c 2004-03-31 12:04:36.000000000 -0800
@@ -45,7 +45,7 @@
#include <linux/mount.h>
#include <linux/security.h>
#include <linux/syscalls.h>
-#include <linux/rmap-locking.h>
+#include <linux/rmap.h>
#include <asm/uaccess.h>
#include <asm/pgalloc.h>
diff -upN reference/include/linux/rmap-locking.h current/include/linux/rmap-locking.h
--- reference/include/linux/rmap-locking.h 2004-03-30 10:13:59.000000000 -0800
+++ current/include/linux/rmap-locking.h 1969-12-31 16:00:00.000000000 -0800
@@ -1,23 +0,0 @@
-/*
- * include/linux/rmap-locking.h
- *
- * Locking primitives for exclusive access to a page's reverse-mapping
- * pte chain.
- */
-
-#include <linux/slab.h>
-
-struct pte_chain;
-extern kmem_cache_t *pte_chain_cache;
-
-#define pte_chain_lock(page) bit_spin_lock(PG_chainlock, (unsigned long *)&page->flags)
-#define pte_chain_unlock(page) bit_spin_unlock(PG_chainlock, (unsigned long *)&page->flags)
-
-struct pte_chain *pte_chain_alloc(int gfp_flags);
-void __pte_chain_free(struct pte_chain *pte_chain);
-
-static inline void pte_chain_free(struct pte_chain *pte_chain)
-{
- if (pte_chain)
- __pte_chain_free(pte_chain);
-}
diff -upN /dev/null current/include/linux/rmap.h
--- /dev/null 2004-02-24 15:23:11.000000000 -0800
+++ current/include/linux/rmap.h 2004-03-31 12:04:36.000000000 -0800
@@ -0,0 +1,51 @@
+#ifndef _LINUX_RMAP_H
+#define _LINUX_RMAP_H
+/*
+ * Declarations for Reverse Mapping functions in mm/rmap.c
+ * Its structures are declared within that file.
+ */
+
+#include <linux/config.h>
+#include <linux/linkage.h>
+
+#define pte_chain_lock(page) bit_spin_lock(PG_chainlock, &(page)->flags)
+#define pte_chain_unlock(page) bit_spin_unlock(PG_chainlock, &(page)->flags)
+
+#ifdef CONFIG_MMU
+
+struct pte_chain;
+struct pte_chain *pte_chain_alloc(int gfp_flags);
+void __pte_chain_free(struct pte_chain *pte_chain);
+
+static inline void pte_chain_free(struct pte_chain *pte_chain)
+{
+ if (pte_chain)
+ __pte_chain_free(pte_chain);
+}
+
+struct pte_chain * fastcall
+ page_add_rmap(struct page *, pte_t *, struct pte_chain *);
+void fastcall page_remove_rmap(struct page *, pte_t *);
+int page_convert_anon(struct page *page);
+
+/*
+ * Called from mm/vmscan.c to handle paging out
+ */
+int fastcall page_referenced(struct page *);
+int fastcall try_to_unmap(struct page *);
+
+#else /* !CONFIG_MMU */
+
+#define page_referenced(page) TestClearPageReferenced(page)
+#define try_to_unmap(page) SWAP_FAIL
+
+#endif /* CONFIG_MMU */
+
+/*
+ * Return values of try_to_unmap
+ */
+#define SWAP_SUCCESS 0
+#define SWAP_AGAIN 1
+#define SWAP_FAIL 2
+
+#endif /* _LINUX_RMAP_H */
diff -upN reference/include/linux/swap.h current/include/linux/swap.h
--- reference/include/linux/swap.h 2004-03-31 12:04:36.000000000 -0800
+++ current/include/linux/swap.h 2004-03-31 12:04:36.000000000 -0800
@@ -76,7 +76,6 @@ struct reclaim_state {
#ifdef __KERNEL__
struct address_space;
-struct pte_chain;
struct sysinfo;
struct writeback_control;
struct zone;
@@ -177,28 +176,11 @@ extern int try_to_free_pages(struct zone
extern int shrink_all_memory(int);
extern int vm_swappiness;
-/* linux/mm/rmap.c */
#ifdef CONFIG_MMU
-int FASTCALL(page_referenced(struct page *));
-struct pte_chain *FASTCALL(page_add_rmap(struct page *, pte_t *,
- struct pte_chain *));
-void FASTCALL(page_remove_rmap(struct page *, pte_t *));
-int FASTCALL(try_to_unmap(struct page *));
-
-int page_convert_anon(struct page *);
-
/* linux/mm/shmem.c */
extern int shmem_unuse(swp_entry_t entry, struct page *page);
-#else
-#define page_referenced(page) TestClearPageReferenced(page)
-#define try_to_unmap(page) SWAP_FAIL
#endif /* CONFIG_MMU */
-/* return values of try_to_unmap */
-#define SWAP_SUCCESS 0
-#define SWAP_AGAIN 1
-#define SWAP_FAIL 2
-
#ifdef CONFIG_SWAP
/* linux/mm/page_io.c */
extern int swap_readpage(struct file *, struct page *);
diff -upN reference/mm/fremap.c current/mm/fremap.c
--- reference/mm/fremap.c 2004-03-31 12:04:36.000000000 -0800
+++ current/mm/fremap.c 2004-03-31 12:04:36.000000000 -0800
@@ -12,7 +12,7 @@
#include <linux/mman.h>
#include <linux/pagemap.h>
#include <linux/swapops.h>
-#include <linux/rmap-locking.h>
+#include <linux/rmap.h>
#include <linux/module.h>
#include <asm/mmu_context.h>
diff -upN reference/mm/memory.c current/mm/memory.c
--- reference/mm/memory.c 2004-03-31 12:04:36.000000000 -0800
+++ current/mm/memory.c 2004-03-31 12:04:36.000000000 -0800
@@ -43,7 +43,7 @@
#include <linux/swap.h>
#include <linux/highmem.h>
#include <linux/pagemap.h>
-#include <linux/rmap-locking.h>
+#include <linux/rmap.h>
#include <linux/module.h>
#include <linux/init.h>
diff -upN reference/mm/mremap.c current/mm/mremap.c
--- reference/mm/mremap.c 2004-02-18 14:57:24.000000000 -0800
+++ current/mm/mremap.c 2004-03-31 12:04:36.000000000 -0800
@@ -15,7 +15,7 @@
#include <linux/swap.h>
#include <linux/fs.h>
#include <linux/highmem.h>
-#include <linux/rmap-locking.h>
+#include <linux/rmap.h>
#include <linux/security.h>
#include <asm/uaccess.h>
diff -upN reference/mm/rmap.c current/mm/rmap.c
--- reference/mm/rmap.c 2004-03-31 12:04:36.000000000 -0800
+++ current/mm/rmap.c 2004-03-31 12:04:36.000000000 -0800
@@ -26,7 +26,7 @@
#include <linux/swapops.h>
#include <linux/slab.h>
#include <linux/init.h>
-#include <linux/rmap-locking.h>
+#include <linux/rmap.h>
#include <linux/cache.h>
#include <linux/percpu.h>
@@ -552,7 +552,6 @@ out:
* pte_chain_lock shrink_list()
* mm->page_table_lock try_to_unmap_one(), trylock
*/
-static int FASTCALL(try_to_unmap_one(struct page *, pte_addr_t));
static int fastcall try_to_unmap_one(struct page * page, pte_addr_t paddr)
{
pte_t *ptep = rmap_ptep_map(paddr);
diff -upN reference/mm/swapfile.c current/mm/swapfile.c
--- reference/mm/swapfile.c 2004-03-31 12:04:36.000000000 -0800
+++ current/mm/swapfile.c 2004-03-31 12:04:36.000000000 -0800
@@ -21,7 +21,7 @@
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/module.h>
-#include <linux/rmap-locking.h>
+#include <linux/rmap.h>
#include <linux/security.h>
#include <asm/pgtable.h>
diff -upN reference/mm/vmscan.c current/mm/vmscan.c
--- reference/mm/vmscan.c 2004-03-30 10:14:01.000000000 -0800
+++ current/mm/vmscan.c 2004-03-31 12:04:36.000000000 -0800
@@ -28,7 +28,7 @@
#include <linux/mm_inline.h>
#include <linux/pagevec.h>
#include <linux/backing-dev.h>
-#include <linux/rmap-locking.h>
+#include <linux/rmap.h>
#include <linux/topology.h>
#include <linux/cpu.h>
#include <linux/notifier.h>