forked from Minki/linux
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 {
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extern bootmem_data_t bootmem_node_data[];
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extern unsigned long bootmem_bootmap_pages(unsigned long);
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extern unsigned long init_bootmem_node(pg_data_t *pgdat,
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unsigned long freepfn,
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unsigned long startpfn,
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unsigned long endpfn);
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extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
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extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
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extern unsigned long free_all_bootmem(void);
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extern void free_bootmem_node(pg_data_t *pgdat,
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unsigned long addr,
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unsigned long size);
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extern void free_bootmem(unsigned long addr, unsigned long size);
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extern void *__alloc_bootmem(unsigned long size,
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/*
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* Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
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* the architecture-specific code should honor this).
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*
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* If flags is 0, then the return value is always 0 (success). If
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* flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
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* memory already was reserved.
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*/
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#define BOOTMEM_DEFAULT 0
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#define BOOTMEM_EXCLUSIVE (1<<0)
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extern int reserve_bootmem_node(pg_data_t *pgdat,
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unsigned long physaddr,
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unsigned long size,
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int flags);
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#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
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extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags);
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#endif
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extern void *__alloc_bootmem_nopanic(unsigned long size,
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unsigned long align,
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unsigned long goal);
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extern void *__alloc_bootmem_nopanic(unsigned long size,
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extern void *__alloc_bootmem(unsigned long size,
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unsigned long align,
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unsigned long goal);
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extern void *__alloc_bootmem_low(unsigned long size,
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unsigned long align,
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unsigned long goal);
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extern void *__alloc_bootmem_node(pg_data_t *pgdat,
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unsigned long size,
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unsigned long align,
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unsigned long goal);
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extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
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unsigned long size,
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unsigned long align,
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unsigned long goal);
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extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
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unsigned long size,
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unsigned long align,
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unsigned long goal);
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/*
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* flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
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* the architecture-specific code should honor this)
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*/
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#define BOOTMEM_DEFAULT 0
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#define BOOTMEM_EXCLUSIVE (1<<0)
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#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
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/*
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* If flags is 0, then the return value is always 0 (success). If
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* flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
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* memory already was reserved.
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*/
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extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags);
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#define alloc_bootmem(x) \
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__alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_low(x) \
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@ -83,38 +109,16 @@ extern int reserve_bootmem(unsigned long addr, unsigned long size, int flags);
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extern int reserve_bootmem_generic(unsigned long addr, unsigned long size,
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int flags);
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extern unsigned long free_all_bootmem(void);
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extern unsigned long free_all_bootmem_node(pg_data_t *pgdat);
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extern void *__alloc_bootmem_node(pg_data_t *pgdat,
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unsigned long size,
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unsigned long align,
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unsigned long goal);
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extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
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unsigned long size,
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unsigned long align,
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unsigned long goal);
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extern unsigned long init_bootmem_node(pg_data_t *pgdat,
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unsigned long freepfn,
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unsigned long startpfn,
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unsigned long endpfn);
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extern int reserve_bootmem_node(pg_data_t *pgdat,
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unsigned long physaddr,
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unsigned long size,
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int flags);
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extern void free_bootmem_node(pg_data_t *pgdat,
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unsigned long addr,
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unsigned long size);
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extern void *alloc_bootmem_section(unsigned long size,
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unsigned long section_nr);
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#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
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#define alloc_bootmem_node(pgdat, x) \
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__alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_pages_node(pgdat, x) \
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__alloc_bootmem_node(pgdat, x, PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
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#define alloc_bootmem_low_pages_node(pgdat, x) \
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__alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
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#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
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extern void *alloc_bootmem_section(unsigned long size,
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unsigned long section_nr);
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#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
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extern void *alloc_remap(int nid, unsigned long size);
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362
mm/bootmem.c
362
mm/bootmem.c
@ -38,6 +38,19 @@ unsigned long saved_max_pfn;
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bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata;
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/*
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* Given an initialised bdata, it returns the size of the boot bitmap
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*/
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static unsigned long __init get_mapsize(bootmem_data_t *bdata)
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{
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unsigned long mapsize;
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unsigned long start = PFN_DOWN(bdata->node_boot_start);
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unsigned long end = bdata->node_low_pfn;
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mapsize = ((end - start) + 7) / 8;
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return ALIGN(mapsize, sizeof(long));
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}
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/* return the number of _pages_ that will be allocated for the boot bitmap */
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unsigned long __init bootmem_bootmap_pages(unsigned long pages)
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{
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@ -71,19 +84,6 @@ static void __init link_bootmem(bootmem_data_t *bdata)
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list_add_tail(&bdata->list, &bdata_list);
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}
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/*
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* Given an initialised bdata, it returns the size of the boot bitmap
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*/
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static unsigned long __init get_mapsize(bootmem_data_t *bdata)
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{
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unsigned long mapsize;
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unsigned long start = PFN_DOWN(bdata->node_boot_start);
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unsigned long end = bdata->node_low_pfn;
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mapsize = ((end - start) + 7) / 8;
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return ALIGN(mapsize, sizeof(long));
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}
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/*
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* Called once to set up the allocator itself.
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*/
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@ -108,6 +108,146 @@ static unsigned long __init init_bootmem_core(bootmem_data_t *bdata,
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return mapsize;
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}
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unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn,
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unsigned long startpfn, unsigned long endpfn)
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{
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return init_bootmem_core(pgdat->bdata, freepfn, startpfn, endpfn);
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}
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unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
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{
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max_low_pfn = pages;
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min_low_pfn = start;
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return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages);
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}
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static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
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{
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struct page *page;
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unsigned long pfn;
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unsigned long i, count;
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unsigned long idx;
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unsigned long *map;
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int gofast = 0;
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BUG_ON(!bdata->node_bootmem_map);
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count = 0;
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/* first extant page of the node */
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pfn = PFN_DOWN(bdata->node_boot_start);
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idx = bdata->node_low_pfn - pfn;
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map = bdata->node_bootmem_map;
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/*
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* Check if we are aligned to BITS_PER_LONG pages. If so, we might
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* be able to free page orders of that size at once.
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*/
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if (!(pfn & (BITS_PER_LONG-1)))
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gofast = 1;
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for (i = 0; i < idx; ) {
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unsigned long v = ~map[i / BITS_PER_LONG];
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if (gofast && v == ~0UL) {
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int order;
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page = pfn_to_page(pfn);
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count += BITS_PER_LONG;
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order = ffs(BITS_PER_LONG) - 1;
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__free_pages_bootmem(page, order);
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i += BITS_PER_LONG;
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page += BITS_PER_LONG;
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} else if (v) {
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unsigned long m;
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page = pfn_to_page(pfn);
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for (m = 1; m && i < idx; m<<=1, page++, i++) {
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if (v & m) {
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count++;
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__free_pages_bootmem(page, 0);
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}
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}
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} else {
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i += BITS_PER_LONG;
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}
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pfn += BITS_PER_LONG;
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}
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/*
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* Now free the allocator bitmap itself, it's not
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* needed anymore:
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*/
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page = virt_to_page(bdata->node_bootmem_map);
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idx = (get_mapsize(bdata) + PAGE_SIZE-1) >> PAGE_SHIFT;
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for (i = 0; i < idx; i++, page++)
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__free_pages_bootmem(page, 0);
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count += i;
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bdata->node_bootmem_map = NULL;
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return count;
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}
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unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
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{
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register_page_bootmem_info_node(pgdat);
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return free_all_bootmem_core(pgdat->bdata);
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}
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unsigned long __init free_all_bootmem(void)
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{
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return free_all_bootmem_core(NODE_DATA(0)->bdata);
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}
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static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr,
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unsigned long size)
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{
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unsigned long sidx, eidx;
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unsigned long i;
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BUG_ON(!size);
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/* out range */
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if (addr + size < bdata->node_boot_start ||
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PFN_DOWN(addr) > bdata->node_low_pfn)
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return;
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/*
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* round down end of usable mem, partially free pages are
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* considered reserved.
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*/
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if (addr >= bdata->node_boot_start && addr < bdata->last_success)
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bdata->last_success = addr;
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/*
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* Round up to index to the range.
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*/
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if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start))
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sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start);
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else
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sidx = 0;
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eidx = PFN_DOWN(addr + size - bdata->node_boot_start);
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if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start))
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eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);
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for (i = sidx; i < eidx; i++) {
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if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map)))
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BUG();
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}
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}
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void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
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unsigned long size)
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{
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free_bootmem_core(pgdat->bdata, physaddr, size);
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}
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void __init free_bootmem(unsigned long addr, unsigned long size)
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{
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bootmem_data_t *bdata;
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list_for_each_entry(bdata, &bdata_list, list)
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free_bootmem_core(bdata, addr, size);
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}
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/*
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* Marks a particular physical memory range as unallocatable. Usable RAM
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* might be used for boot-time allocations - or it might get added
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@ -183,44 +323,37 @@ static void __init reserve_bootmem_core(bootmem_data_t *bdata,
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}
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}
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static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr,
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unsigned long size)
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int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
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unsigned long size, int flags)
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{
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unsigned long sidx, eidx;
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unsigned long i;
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int ret;
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BUG_ON(!size);
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/* out range */
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if (addr + size < bdata->node_boot_start ||
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PFN_DOWN(addr) > bdata->node_low_pfn)
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return;
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/*
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* round down end of usable mem, partially free pages are
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* considered reserved.
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*/
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if (addr >= bdata->node_boot_start && addr < bdata->last_success)
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bdata->last_success = addr;
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/*
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* Round up to index to the range.
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*/
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if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start))
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sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start);
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else
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sidx = 0;
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eidx = PFN_DOWN(addr + size - bdata->node_boot_start);
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if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start))
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eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);
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for (i = sidx; i < eidx; i++) {
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if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map)))
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BUG();
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}
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ret = can_reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
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if (ret < 0)
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return -ENOMEM;
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reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
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return 0;
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}
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#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
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int __init reserve_bootmem(unsigned long addr, unsigned long size,
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int flags)
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{
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bootmem_data_t *bdata;
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int ret;
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list_for_each_entry(bdata, &bdata_list, list) {
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ret = can_reserve_bootmem_core(bdata, addr, size, flags);
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if (ret < 0)
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return ret;
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}
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list_for_each_entry(bdata, &bdata_list, list)
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reserve_bootmem_core(bdata, addr, size, flags);
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return 0;
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}
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#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
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/*
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* We 'merge' subsequent allocations to save space. We might 'lose'
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* some fraction of a page if allocations cannot be satisfied due to
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@ -371,140 +504,6 @@ found:
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return ret;
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}
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static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
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{
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struct page *page;
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unsigned long pfn;
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unsigned long i, count;
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unsigned long idx;
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unsigned long *map;
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int gofast = 0;
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BUG_ON(!bdata->node_bootmem_map);
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count = 0;
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/* first extant page of the node */
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pfn = PFN_DOWN(bdata->node_boot_start);
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idx = bdata->node_low_pfn - pfn;
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map = bdata->node_bootmem_map;
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/*
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* Check if we are aligned to BITS_PER_LONG pages. If so, we might
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* be able to free page orders of that size at once.
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*/
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if (!(pfn & (BITS_PER_LONG-1)))
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gofast = 1;
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for (i = 0; i < idx; ) {
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unsigned long v = ~map[i / BITS_PER_LONG];
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if (gofast && v == ~0UL) {
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int order;
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page = pfn_to_page(pfn);
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count += BITS_PER_LONG;
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order = ffs(BITS_PER_LONG) - 1;
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__free_pages_bootmem(page, order);
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i += BITS_PER_LONG;
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page += BITS_PER_LONG;
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} else if (v) {
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unsigned long m;
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page = pfn_to_page(pfn);
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for (m = 1; m && i < idx; m<<=1, page++, i++) {
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if (v & m) {
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count++;
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__free_pages_bootmem(page, 0);
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}
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}
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} else {
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i += BITS_PER_LONG;
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}
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pfn += BITS_PER_LONG;
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}
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/*
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* Now free the allocator bitmap itself, it's not
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* needed anymore:
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*/
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page = virt_to_page(bdata->node_bootmem_map);
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idx = (get_mapsize(bdata) + PAGE_SIZE-1) >> PAGE_SHIFT;
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for (i = 0; i < idx; i++, page++)
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__free_pages_bootmem(page, 0);
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count += i;
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bdata->node_bootmem_map = NULL;
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return count;
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}
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unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn,
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unsigned long startpfn, unsigned long endpfn)
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{
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return init_bootmem_core(pgdat->bdata, freepfn, startpfn, endpfn);
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}
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int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
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unsigned long size, int flags)
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{
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int ret;
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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