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Subject[RFC: 2.6 patch] mm/: possible cleanups
This patch contains the following possible cleanups:
- make the following needlessly global functions static:
- slab.c: kmem_find_general_cachep
- swap.c: __page_cache_release
- vmalloc.c: __vmalloc_node
- remove the following unused EXPORT_SYMBOL's:
- bootmem.c: max_pfn
- memory.c: vmtruncate_range
- mmzone.c: first_online_pgdat
- mmzone.c: next_online_pgdat
- mmzone.c: next_zone
- util.c: strndup_user

Signed-off-by: Adrian Bunk <bunk@stusta.de>

---
include/linux/mm.h | 2 --
include/linux/slab.h | 2 --
include/linux/vmalloc.h | 2 --
mm/bootmem.c | 4 ----
mm/memory.c | 1 -
mm/mmzone.c | 4 ----
mm/slab.c | 3 +--
mm/swap.c | 39 +++++++++++++++++++--------------------
mm/util.c | 1 -
mm/vmalloc.c | 9 +++++----
10 files changed, 25 insertions(+), 42 deletions(-)
--- linux-2.6.17-rc1-mm1-full/mm/bootmem.c.old 2006-04-07 10:55:20.000000000 +0200
+++ linux-2.6.17-rc1-mm1-full/mm/bootmem.c 2006-04-07 10:56:37.000000000 +0200
@@ -29,10 +29,6 @@
unsigned long min_low_pfn;
unsigned long max_pfn;

-EXPORT_SYMBOL(max_pfn); /* This is exported so
- * dma_get_required_mask(), which uses
- * it, can be an inline function */
-
static LIST_HEAD(bdata_list);
#ifdef CONFIG_CRASH_DUMP
/*
--- linux-2.6.17-rc1-mm1-full/mm/memory.c.old 2006-04-07 13:57:09.000000000 +0200
+++ linux-2.6.17-rc1-mm1-full/mm/memory.c 2006-04-07 13:58:19.000000000 +0200
@@ -1802,7 +1802,6 @@

return 0;
}
-EXPORT_SYMBOL(vmtruncate_range);

/*
* Primitive swap readahead code. We simply read an aligned block of
--- linux-2.6.17-rc1-mm1-full/mm/mmzone.c.old 2006-04-07 14:06:37.000000000 +0200
+++ linux-2.6.17-rc1-mm1-full/mm/mmzone.c 2006-04-07 14:09:48.000000000 +0200
@@ -15,8 +15,6 @@
return NODE_DATA(first_online_node);
}

-EXPORT_SYMBOL(first_online_pgdat);
-
struct pglist_data *next_online_pgdat(struct pglist_data *pgdat)
{
int nid = next_online_node(pgdat->node_id);
@@ -25,7 +23,6 @@
return NULL;
return NODE_DATA(nid);
}
-EXPORT_SYMBOL(next_online_pgdat);


/*
@@ -46,5 +43,4 @@
}
return zone;
}
-EXPORT_SYMBOL(next_zone);

--- linux-2.6.17-rc1-mm1-full/include/linux/slab.h.old 2006-04-07 14:11:18.000000000 +0200
+++ linux-2.6.17-rc1-mm1-full/include/linux/slab.h 2006-04-07 14:11:35.000000000 +0200
@@ -68,7 +68,6 @@
extern void kmem_cache_free(kmem_cache_t *, void *);
extern unsigned int kmem_cache_size(kmem_cache_t *);
extern const char *kmem_cache_name(kmem_cache_t *);
-extern kmem_cache_t *kmem_find_general_cachep(size_t size, gfp_t gfpflags);

/* Size description struct for general caches. */
struct cache_sizes {
@@ -176,7 +175,6 @@
/* SLOB allocator routines */

void kmem_cache_init(void);
-struct kmem_cache *kmem_find_general_cachep(size_t, gfp_t gfpflags);
struct kmem_cache *kmem_cache_create(const char *c, size_t, size_t,
unsigned long,
void (*)(void *, struct kmem_cache *, unsigned long),
--- linux-2.6.17-rc1-mm1-full/mm/slab.c.old 2006-04-07 14:11:43.000000000 +0200
+++ linux-2.6.17-rc1-mm1-full/mm/slab.c 2006-04-07 14:11:52.000000000 +0200
@@ -742,11 +742,10 @@
return csizep->cs_cachep;
}

-struct kmem_cache *kmem_find_general_cachep(size_t size, gfp_t gfpflags)
+static struct kmem_cache *kmem_find_general_cachep(size_t size, gfp_t gfpflags)
{
return __find_general_cachep(size, gfpflags);
}
-EXPORT_SYMBOL(kmem_find_general_cachep);

static size_t slab_mgmt_size(size_t nr_objs, size_t align)
{
--- linux-2.6.17-rc1-mm1-full/include/linux/mm.h.old 2006-04-07 14:14:12.000000000 +0200
+++ linux-2.6.17-rc1-mm1-full/include/linux/mm.h 2006-04-07 14:14:17.000000000 +0200
@@ -320,8 +320,6 @@
return atomic_inc_not_zero(&page->_count);
}

-extern void FASTCALL(__page_cache_release(struct page *));
-
static inline int page_count(struct page *page)
{
if (unlikely(PageCompound(page)))
--- linux-2.6.17-rc1-mm1-full/mm/swap.c.old 2006-04-07 14:14:27.000000000 +0200
+++ linux-2.6.17-rc1-mm1-full/mm/swap.c 2006-04-07 14:15:29.000000000 +0200
@@ -35,6 +35,25 @@
/* How many pages do we try to swap or page in/out together? */
int page_cluster;

+/*
+ * This path almost never happens for VM activity - pages are normally
+ * freed via pagevecs. But it gets used by networking.
+ */
+static void fastcall __page_cache_release(struct page *page)
+{
+ if (PageLRU(page)) {
+ unsigned long flags;
+ struct zone *zone = page_zone(page);
+
+ spin_lock_irqsave(&zone->lru_lock, flags);
+ VM_BUG_ON(!PageLRU(page));
+ __ClearPageLRU(page);
+ del_page_from_lru(zone, page);
+ spin_unlock_irqrestore(&zone->lru_lock, flags);
+ }
+ free_hot_page(page);
+}
+
static void put_compound_page(struct page *page)
{
page = (struct page *)page_private(page);
@@ -204,26 +223,6 @@
#endif

/*
- * This path almost never happens for VM activity - pages are normally
- * freed via pagevecs. But it gets used by networking.
- */
-void fastcall __page_cache_release(struct page *page)
-{
- if (PageLRU(page)) {
- unsigned long flags;
- struct zone *zone = page_zone(page);
-
- spin_lock_irqsave(&zone->lru_lock, flags);
- VM_BUG_ON(!PageLRU(page));
- __ClearPageLRU(page);
- del_page_from_lru(zone, page);
- spin_unlock_irqrestore(&zone->lru_lock, flags);
- }
- free_hot_page(page);
-}
-EXPORT_SYMBOL(__page_cache_release);
-
-/*
* Batched page_cache_release(). Decrement the reference count on all the
* passed pages. If it fell to zero then remove the page from the LRU and
* free it.
--- linux-2.6.17-rc1-mm1-full/mm/util.c.old 2006-04-07 14:16:14.000000000 +0200
+++ linux-2.6.17-rc1-mm1-full/mm/util.c 2006-04-07 14:16:22.000000000 +0200
@@ -73,4 +73,3 @@

return p;
}
-EXPORT_SYMBOL(strndup_user);
--- linux-2.6.17-rc1-mm1-full/include/linux/vmalloc.h.old 2006-04-07 14:16:49.000000000 +0200
+++ linux-2.6.17-rc1-mm1-full/include/linux/vmalloc.h 2006-04-07 14:17:29.000000000 +0200
@@ -38,8 +38,6 @@
extern void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot);
extern void *__vmalloc_area(struct vm_struct *area, gfp_t gfp_mask,
pgprot_t prot);
-extern void *__vmalloc_node(unsigned long size, gfp_t gfp_mask,
- pgprot_t prot, int node);
extern void vfree(void *addr);

extern void *vmap(struct page **pages, unsigned int count,
--- linux-2.6.17-rc1-mm1-full/mm/vmalloc.c.old 2006-04-07 14:17:43.000000000 +0200
+++ linux-2.6.17-rc1-mm1-full/mm/vmalloc.c 2006-04-07 14:18:26.000000000 +0200
@@ -24,6 +24,9 @@
DEFINE_RWLOCK(vmlist_lock);
struct vm_struct *vmlist;

+static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
+ int node);
+
static void vunmap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end)
{
pte_t *pte;
@@ -462,8 +465,8 @@
* allocator with @gfp_mask flags. Map them into contiguous
* kernel virtual space, using a pagetable protection of @prot.
*/
-void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
- int node)
+static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
+ int node)
{
struct vm_struct *area;

@@ -477,7 +480,6 @@

return __vmalloc_area_node(area, gfp_mask, prot, node);
}
-EXPORT_SYMBOL(__vmalloc_node);

void *__vmalloc(unsigned long size, gfp_t gfp_mask, pgprot_t prot)
{
-
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