bootmem: reorder code to match new bootmem structure
This only reorders functions so that further patches will be easier to
read. No code changed.
Signed-off-by: Johannes Weiner <hannes@saeurebad.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/bootmem.c b/mm/bootmem.c
index 9ac9725..24eacf5 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -38,6 +38,19 @@
bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata;
+/*
+ * Given an initialised bdata, it returns the size of the boot bitmap
+ */
+static unsigned long __init get_mapsize(bootmem_data_t *bdata)
+{
+ unsigned long mapsize;
+ unsigned long start = PFN_DOWN(bdata->node_boot_start);
+ unsigned long end = bdata->node_low_pfn;
+
+ mapsize = ((end - start) + 7) / 8;
+ return ALIGN(mapsize, sizeof(long));
+}
+
/* return the number of _pages_ that will be allocated for the boot bitmap */
unsigned long __init bootmem_bootmap_pages(unsigned long pages)
{
@@ -72,19 +85,6 @@
}
/*
- * Given an initialised bdata, it returns the size of the boot bitmap
- */
-static unsigned long __init get_mapsize(bootmem_data_t *bdata)
-{
- unsigned long mapsize;
- unsigned long start = PFN_DOWN(bdata->node_boot_start);
- unsigned long end = bdata->node_low_pfn;
-
- mapsize = ((end - start) + 7) / 8;
- return ALIGN(mapsize, sizeof(long));
-}
-
-/*
* Called once to set up the allocator itself.
*/
static unsigned long __init init_bootmem_core(bootmem_data_t *bdata,
@@ -108,6 +108,146 @@
return mapsize;
}
+unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn,
+ unsigned long startpfn, unsigned long endpfn)
+{
+ return init_bootmem_core(pgdat->bdata, freepfn, startpfn, endpfn);
+}
+
+unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
+{
+ max_low_pfn = pages;
+ min_low_pfn = start;
+ return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages);
+}
+
+static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
+{
+ struct page *page;
+ unsigned long pfn;
+ unsigned long i, count;
+ unsigned long idx;
+ unsigned long *map;
+ int gofast = 0;
+
+ BUG_ON(!bdata->node_bootmem_map);
+
+ count = 0;
+ /* first extant page of the node */
+ pfn = PFN_DOWN(bdata->node_boot_start);
+ idx = bdata->node_low_pfn - pfn;
+ map = bdata->node_bootmem_map;
+ /*
+ * Check if we are aligned to BITS_PER_LONG pages. If so, we might
+ * be able to free page orders of that size at once.
+ */
+ if (!(pfn & (BITS_PER_LONG-1)))
+ gofast = 1;
+
+ for (i = 0; i < idx; ) {
+ unsigned long v = ~map[i / BITS_PER_LONG];
+
+ if (gofast && v == ~0UL) {
+ int order;
+
+ page = pfn_to_page(pfn);
+ count += BITS_PER_LONG;
+ order = ffs(BITS_PER_LONG) - 1;
+ __free_pages_bootmem(page, order);
+ i += BITS_PER_LONG;
+ page += BITS_PER_LONG;
+ } else if (v) {
+ unsigned long m;
+
+ page = pfn_to_page(pfn);
+ for (m = 1; m && i < idx; m<<=1, page++, i++) {
+ if (v & m) {
+ count++;
+ __free_pages_bootmem(page, 0);
+ }
+ }
+ } else {
+ i += BITS_PER_LONG;
+ }
+ pfn += BITS_PER_LONG;
+ }
+
+ /*
+ * Now free the allocator bitmap itself, it's not
+ * needed anymore:
+ */
+ page = virt_to_page(bdata->node_bootmem_map);
+ idx = (get_mapsize(bdata) + PAGE_SIZE-1) >> PAGE_SHIFT;
+ for (i = 0; i < idx; i++, page++)
+ __free_pages_bootmem(page, 0);
+ count += i;
+ bdata->node_bootmem_map = NULL;
+
+ return count;
+}
+
+unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
+{
+ register_page_bootmem_info_node(pgdat);
+ return free_all_bootmem_core(pgdat->bdata);
+}
+
+unsigned long __init free_all_bootmem(void)
+{
+ return free_all_bootmem_core(NODE_DATA(0)->bdata);
+}
+
+static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr,
+ unsigned long size)
+{
+ unsigned long sidx, eidx;
+ unsigned long i;
+
+ BUG_ON(!size);
+
+ /* out range */
+ if (addr + size < bdata->node_boot_start ||
+ PFN_DOWN(addr) > bdata->node_low_pfn)
+ return;
+ /*
+ * round down end of usable mem, partially free pages are
+ * considered reserved.
+ */
+
+ if (addr >= bdata->node_boot_start && addr < bdata->last_success)
+ bdata->last_success = addr;
+
+ /*
+ * Round up to index to the range.
+ */
+ if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start))
+ sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start);
+ else
+ sidx = 0;
+
+ eidx = PFN_DOWN(addr + size - bdata->node_boot_start);
+ if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start))
+ eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);
+
+ for (i = sidx; i < eidx; i++) {
+ if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map)))
+ BUG();
+ }
+}
+
+void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
+ unsigned long size)
+{
+ free_bootmem_core(pgdat->bdata, physaddr, size);
+}
+
+void __init free_bootmem(unsigned long addr, unsigned long size)
+{
+ bootmem_data_t *bdata;
+ list_for_each_entry(bdata, &bdata_list, list)
+ free_bootmem_core(bdata, addr, size);
+}
+
/*
* Marks a particular physical memory range as unallocatable. Usable RAM
* might be used for boot-time allocations - or it might get added
@@ -183,44 +323,37 @@
}
}
-static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr,
- unsigned long size)
+int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
+ unsigned long size, int flags)
{
- unsigned long sidx, eidx;
- unsigned long i;
+ int ret;
- BUG_ON(!size);
-
- /* out range */
- if (addr + size < bdata->node_boot_start ||
- PFN_DOWN(addr) > bdata->node_low_pfn)
- return;
- /*
- * round down end of usable mem, partially free pages are
- * considered reserved.
- */
-
- if (addr >= bdata->node_boot_start && addr < bdata->last_success)
- bdata->last_success = addr;
-
- /*
- * Round up to index to the range.
- */
- if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start))
- sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start);
- else
- sidx = 0;
-
- eidx = PFN_DOWN(addr + size - bdata->node_boot_start);
- if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start))
- eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);
-
- for (i = sidx; i < eidx; i++) {
- if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map)))
- BUG();
- }
+ ret = can_reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
+ if (ret < 0)
+ return -ENOMEM;
+ reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
+ return 0;
}
+#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
+int __init reserve_bootmem(unsigned long addr, unsigned long size,
+ int flags)
+{
+ bootmem_data_t *bdata;
+ int ret;
+
+ list_for_each_entry(bdata, &bdata_list, list) {
+ ret = can_reserve_bootmem_core(bdata, addr, size, flags);
+ if (ret < 0)
+ return ret;
+ }
+ list_for_each_entry(bdata, &bdata_list, list)
+ reserve_bootmem_core(bdata, addr, size, flags);
+
+ return 0;
+}
+#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
+
/*
* We 'merge' subsequent allocations to save space. We might 'lose'
* some fraction of a page if allocations cannot be satisfied due to
@@ -371,140 +504,6 @@
return ret;
}
-static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
-{
- struct page *page;
- unsigned long pfn;
- unsigned long i, count;
- unsigned long idx;
- unsigned long *map;
- int gofast = 0;
-
- BUG_ON(!bdata->node_bootmem_map);
-
- count = 0;
- /* first extant page of the node */
- pfn = PFN_DOWN(bdata->node_boot_start);
- idx = bdata->node_low_pfn - pfn;
- map = bdata->node_bootmem_map;
- /*
- * Check if we are aligned to BITS_PER_LONG pages. If so, we might
- * be able to free page orders of that size at once.
- */
- if (!(pfn & (BITS_PER_LONG-1)))
- gofast = 1;
-
- for (i = 0; i < idx; ) {
- unsigned long v = ~map[i / BITS_PER_LONG];
-
- if (gofast && v == ~0UL) {
- int order;
-
- page = pfn_to_page(pfn);
- count += BITS_PER_LONG;
- order = ffs(BITS_PER_LONG) - 1;
- __free_pages_bootmem(page, order);
- i += BITS_PER_LONG;
- page += BITS_PER_LONG;
- } else if (v) {
- unsigned long m;
-
- page = pfn_to_page(pfn);
- for (m = 1; m && i < idx; m<<=1, page++, i++) {
- if (v & m) {
- count++;
- __free_pages_bootmem(page, 0);
- }
- }
- } else {
- i += BITS_PER_LONG;
- }
- pfn += BITS_PER_LONG;
- }
-
- /*
- * Now free the allocator bitmap itself, it's not
- * needed anymore:
- */
- page = virt_to_page(bdata->node_bootmem_map);
- idx = (get_mapsize(bdata) + PAGE_SIZE-1) >> PAGE_SHIFT;
- for (i = 0; i < idx; i++, page++)
- __free_pages_bootmem(page, 0);
- count += i;
- bdata->node_bootmem_map = NULL;
-
- return count;
-}
-
-unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn,
- unsigned long startpfn, unsigned long endpfn)
-{
- return init_bootmem_core(pgdat->bdata, freepfn, startpfn, endpfn);
-}
-
-int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
- unsigned long size, int flags)
-{
- int ret;
-
- ret = can_reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
- if (ret < 0)
- return -ENOMEM;
- reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
-
- return 0;
-}
-
-void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
- unsigned long size)
-{
- free_bootmem_core(pgdat->bdata, physaddr, size);
-}
-
-unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
-{
- register_page_bootmem_info_node(pgdat);
- return free_all_bootmem_core(pgdat->bdata);
-}
-
-unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
-{
- max_low_pfn = pages;
- min_low_pfn = start;
- return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages);
-}
-
-#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
-int __init reserve_bootmem(unsigned long addr, unsigned long size,
- int flags)
-{
- bootmem_data_t *bdata;
- int ret;
-
- list_for_each_entry(bdata, &bdata_list, list) {
- ret = can_reserve_bootmem_core(bdata, addr, size, flags);
- if (ret < 0)
- return ret;
- }
- list_for_each_entry(bdata, &bdata_list, list)
- reserve_bootmem_core(bdata, addr, size, flags);
-
- return 0;
-}
-#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
-
-void __init free_bootmem(unsigned long addr, unsigned long size)
-{
- bootmem_data_t *bdata;
- list_for_each_entry(bdata, &bdata_list, list)
- free_bootmem_core(bdata, addr, size);
-}
-
-unsigned long __init free_all_bootmem(void)
-{
- return free_all_bootmem_core(NODE_DATA(0)->bdata);
-}
-
void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
unsigned long goal)
{
@@ -534,7 +533,6 @@
return NULL;
}
-
void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
unsigned long align, unsigned long goal)
{