mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 21:38:32 +08:00
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>
This commit is contained in:
Johannes Weiner
Linus Torvalds
parent
7251ff78b9
commit
223e8dc924
@ -41,36 +41,62 @@ typedef struct bootmem_data {
|
||||
extern bootmem_data_t bootmem_node_data[];
|
||||
|
||||
extern unsigned long bootmem_bootmap_pages(unsigned long);
|
||||
|
||||
extern unsigned long init_bootmem_node(pg_data_t *pgdat,
|
||||
unsigned long freepfn,
|
||||
unsigned long startpfn,
|
||||
unsigned long endpfn);
|
||||
extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
|
||||
|
||||
extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
|
||||
extern unsigned long free_all_bootmem(void);
|
||||
|
||||
extern void free_bootmem_node(pg_data_t *pgdat,
|
||||
unsigned long addr,
|
||||
unsigned long size);
|
||||
extern void free_bootmem(unsigned long addr, unsigned long size);
|
||||
extern void *__alloc_bootmem(unsigned long size,
|
||||
|
||||
/*
|
||||
* Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
|
||||
* the architecture-specific code should honor this).
|
||||
*
|
||||
* If flags is 0, then the return value is always 0 (success). If
|
||||
* flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
|
||||
* memory already was reserved.
|
||||
*/
|
||||
#define BOOTMEM_DEFAULT 0
|
||||
#define BOOTMEM_EXCLUSIVE (1<<0)
|
||||
|
||||
extern int reserve_bootmem_node(pg_data_t *pgdat,
|
||||
unsigned long physaddr,
|
||||
unsigned long size,
|
||||
int flags);
|
||||
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
|
||||
extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags);
|
||||
#endif
|
||||
|
||||
extern void *__alloc_bootmem_nopanic(unsigned long size,
|
||||
unsigned long align,
|
||||
unsigned long goal);
|
||||
extern void *__alloc_bootmem_nopanic(unsigned long size,
|
||||
extern void *__alloc_bootmem(unsigned long size,
|
||||
unsigned long align,
|
||||
unsigned long goal);
|
||||
extern void *__alloc_bootmem_low(unsigned long size,
|
||||
unsigned long align,
|
||||
unsigned long goal);
|
||||
extern void *__alloc_bootmem_node(pg_data_t *pgdat,
|
||||
unsigned long size,
|
||||
unsigned long align,
|
||||
unsigned long goal);
|
||||
extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
|
||||
unsigned long size,
|
||||
unsigned long align,
|
||||
unsigned long goal);
|
||||
extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
|
||||
unsigned long size,
|
||||
unsigned long align,
|
||||
unsigned long goal);
|
||||
|
||||
/*
|
||||
* flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
|
||||
* the architecture-specific code should honor this)
|
||||
*/
|
||||
#define BOOTMEM_DEFAULT 0
|
||||
#define BOOTMEM_EXCLUSIVE (1<<0)
|
||||
|
||||
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
|
||||
/*
|
||||
* If flags is 0, then the return value is always 0 (success). If
|
||||
* flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
|
||||
* memory already was reserved.
|
||||
*/
|
||||
extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags);
|
||||
#define alloc_bootmem(x) \
|
||||
__alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
|
||||
#define alloc_bootmem_low(x) \
|
||||
@ -83,38 +109,16 @@ extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags);
|
||||
|
||||
extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
|
||||
int flags);
|
||||
extern unsigned long free_all_bootmem(void);
|
||||
extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
|
||||
extern void *__alloc_bootmem_node(pg_data_t *pgdat,
|
||||
unsigned long size,
|
||||
unsigned long align,
|
||||
unsigned long goal);
|
||||
extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
|
||||
unsigned long size,
|
||||
unsigned long align,
|
||||
unsigned long goal);
|
||||
extern unsigned long init_bootmem_node(pg_data_t *pgdat,
|
||||
unsigned long freepfn,
|
||||
unsigned long startpfn,
|
||||
unsigned long endpfn);
|
||||
extern int reserve_bootmem_node(pg_data_t *pgdat,
|
||||
unsigned long physaddr,
|
||||
unsigned long size,
|
||||
int flags);
|
||||
extern void free_bootmem_node(pg_data_t *pgdat,
|
||||
unsigned long addr,
|
||||
unsigned long size);
|
||||
extern void *alloc_bootmem_section(unsigned long size,
|
||||
unsigned long section_nr);
|
||||
|
||||
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
|
||||
#define alloc_bootmem_node(pgdat, x) \
|
||||
__alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
|
||||
#define alloc_bootmem_pages_node(pgdat, x) \
|
||||
__alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
|
||||
#define alloc_bootmem_low_pages_node(pgdat, x) \
|
||||
__alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
|
||||
#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
|
||||
|
||||
extern void *alloc_bootmem_section(unsigned long size,
|
||||
unsigned long section_nr);
|
||||
|
||||
#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
|
||||
extern void *alloc_remap(int nid, unsigned long size);
|
||||
|
||||
362
mm/bootmem.c
362
mm/bootmem.c
@ -38,6 +38,19 @@ unsigned long saved_max_pfn;
|
||||
|
||||
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)
|
||||
{
|
||||
@ -71,19 +84,6 @@ static void __init link_bootmem(bootmem_data_t *bdata)
|
||||
list_add_tail(&bdata->list, &bdata_list);
|
||||
}
|
||||
|
||||
/*
|
||||
* 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.
|
||||
*/
|
||||
@ -108,6 +108,146 @@ static unsigned long __init init_bootmem_core(bootmem_data_t *bdata,
|
||||
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 reserve_bootmem_core(bootmem_data_t *bdata,
|
||||
}
|
||||
}
|
||||
|
||||
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 @@ found:
|
||||
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 @@ void * __init __alloc_bootmem(unsigned long size, unsigned long align,
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
|
||||
unsigned long align, unsigned long goal)
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user