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authorYinghai Lu <yinghai@kernel.org>2011-02-24 14:43:05 +0100
committerTejun Heo <tj@kernel.org>2011-02-24 14:43:05 +0100
commit0932587328d9bd5b500a640fbaff3290c8d4cabf (patch)
tree7c041a41db88f7bb6d98f2a69e21a33a311b469f /mm/bootmem.c
parent2bf50555b0920be7e29d3823f6bbd20ee5920489 (diff)
downloadlinux-0932587328d9bd5b500a640fbaff3290c8d4cabf.tar.gz
bootmem: Separate out CONFIG_NO_BOOTMEM code into nobootmem.c
mm/bootmem.c contained code paths for both bootmem and no bootmem configurations. They implement about the same set of APIs in different ways and as a result bootmem.c contains massive amount of #ifdef CONFIG_NO_BOOTMEM. Separate out CONFIG_NO_BOOTMEM code into mm/nobootmem.c. As the common part is relatively small, duplicate them in nobootmem.c instead of creating a common file or ifdef'ing in bootmem.c. The followings are duplicated. * {min|max}_low_pfn, max_pfn, saved_max_pfn * free_bootmem_late() * ___alloc_bootmem() * __alloc_bootmem_low() The followings are applicable only to nobootmem and moved verbatim. * __free_pages_memory() * free_all_memory_core_early() The followings are not applicable to nobootmem and omitted in nobootmem.c. * reserve_bootmem_node() * reserve_bootmem() The rest split function bodies according to CONFIG_NO_BOOTMEM. Makefile is updated so that only either bootmem.c or nobootmem.c is built according to CONFIG_NO_BOOTMEM. This patch doesn't introduce any behavior change. -tj: Rewrote commit description. Suggested-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Acked-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'mm/bootmem.c')
-rw-r--r--mm/bootmem.c173
1 files changed, 3 insertions, 170 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c
index 13b0caa9793..4403e2fbc13 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -35,7 +35,6 @@ unsigned long max_pfn;
unsigned long saved_max_pfn;
#endif
-#ifndef CONFIG_NO_BOOTMEM
bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata;
static struct list_head bdata_list __initdata = LIST_HEAD_INIT(bdata_list);
@@ -146,7 +145,7 @@ unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
min_low_pfn = start;
return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages);
}
-#endif
+
/*
* free_bootmem_late - free bootmem pages directly to page allocator
* @addr: starting address of the range
@@ -171,53 +170,6 @@ void __init free_bootmem_late(unsigned long addr, unsigned long size)
}
}
-#ifdef CONFIG_NO_BOOTMEM
-static void __init __free_pages_memory(unsigned long start, unsigned long end)
-{
- int i;
- unsigned long start_aligned, end_aligned;
- int order = ilog2(BITS_PER_LONG);
-
- start_aligned = (start + (BITS_PER_LONG - 1)) & ~(BITS_PER_LONG - 1);
- end_aligned = end & ~(BITS_PER_LONG - 1);
-
- if (end_aligned <= start_aligned) {
- for (i = start; i < end; i++)
- __free_pages_bootmem(pfn_to_page(i), 0);
-
- return;
- }
-
- for (i = start; i < start_aligned; i++)
- __free_pages_bootmem(pfn_to_page(i), 0);
-
- for (i = start_aligned; i < end_aligned; i += BITS_PER_LONG)
- __free_pages_bootmem(pfn_to_page(i), order);
-
- for (i = end_aligned; i < end; i++)
- __free_pages_bootmem(pfn_to_page(i), 0);
-}
-
-unsigned long __init free_all_memory_core_early(int nodeid)
-{
- int i;
- u64 start, end;
- unsigned long count = 0;
- struct range *range = NULL;
- int nr_range;
-
- nr_range = get_free_all_memory_range(&range, nodeid);
-
- for (i = 0; i < nr_range; i++) {
- start = range[i].start;
- end = range[i].end;
- count += end - start;
- __free_pages_memory(start, end);
- }
-
- return count;
-}
-#else
static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
{
int aligned;
@@ -278,7 +230,6 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
return count;
}
-#endif
/**
* free_all_bootmem_node - release a node's free pages to the buddy allocator
@@ -289,12 +240,7 @@ static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
{
register_page_bootmem_info_node(pgdat);
-#ifdef CONFIG_NO_BOOTMEM
- /* free_all_memory_core_early(MAX_NUMNODES) will be called later */
- return 0;
-#else
return free_all_bootmem_core(pgdat->bdata);
-#endif
}
/**
@@ -304,16 +250,6 @@ unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
*/
unsigned long __init free_all_bootmem(void)
{
-#ifdef CONFIG_NO_BOOTMEM
- /*
- * We need to use MAX_NUMNODES instead of NODE_DATA(0)->node_id
- * because in some case like Node0 doesnt have RAM installed
- * low ram will be on Node1
- * Use MAX_NUMNODES will make sure all ranges in early_node_map[]
- * will be used instead of only Node0 related
- */
- return free_all_memory_core_early(MAX_NUMNODES);
-#else
unsigned long total_pages = 0;
bootmem_data_t *bdata;
@@ -321,10 +257,8 @@ unsigned long __init free_all_bootmem(void)
total_pages += free_all_bootmem_core(bdata);
return total_pages;
-#endif
}
-#ifndef CONFIG_NO_BOOTMEM
static void __init __free(bootmem_data_t *bdata,
unsigned long sidx, unsigned long eidx)
{
@@ -419,7 +353,6 @@ static int __init mark_bootmem(unsigned long start, unsigned long end,
}
BUG();
}
-#endif
/**
* free_bootmem_node - mark a page range as usable
@@ -434,10 +367,6 @@ static int __init mark_bootmem(unsigned long start, unsigned long end,
void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
unsigned long size)
{
-#ifdef CONFIG_NO_BOOTMEM
- kmemleak_free_part(__va(physaddr), size);
- memblock_x86_free_range(physaddr, physaddr + size);
-#else
unsigned long start, end;
kmemleak_free_part(__va(physaddr), size);
@@ -446,7 +375,6 @@ void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
end = PFN_DOWN(physaddr + size);
mark_bootmem_node(pgdat->bdata, start, end, 0, 0);
-#endif
}
/**
@@ -460,10 +388,6 @@ void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
*/
void __init free_bootmem(unsigned long addr, unsigned long size)
{
-#ifdef CONFIG_NO_BOOTMEM
- kmemleak_free_part(__va(addr), size);
- memblock_x86_free_range(addr, addr + size);
-#else
unsigned long start, end;
kmemleak_free_part(__va(addr), size);
@@ -472,7 +396,6 @@ void __init free_bootmem(unsigned long addr, unsigned long size)
end = PFN_DOWN(addr + size);
mark_bootmem(start, end, 0, 0);
-#endif
}
/**
@@ -489,17 +412,12 @@ void __init free_bootmem(unsigned long addr, unsigned long size)
int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
unsigned long size, int flags)
{
-#ifdef CONFIG_NO_BOOTMEM
- panic("no bootmem");
- return 0;
-#else
unsigned long start, end;
start = PFN_DOWN(physaddr);
end = PFN_UP(physaddr + size);
return mark_bootmem_node(pgdat->bdata, start, end, 1, flags);
-#endif
}
/**
@@ -515,20 +433,14 @@ int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
int __init reserve_bootmem(unsigned long addr, unsigned long size,
int flags)
{
-#ifdef CONFIG_NO_BOOTMEM
- panic("no bootmem");
- return 0;
-#else
unsigned long start, end;
start = PFN_DOWN(addr);
end = PFN_UP(addr + size);
return mark_bootmem(start, end, 1, flags);
-#endif
}
-#ifndef CONFIG_NO_BOOTMEM
int __weak __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
int flags)
{
@@ -685,33 +597,12 @@ static void * __init alloc_arch_preferred_bootmem(bootmem_data_t *bdata,
#endif
return NULL;
}
-#endif
static void * __init ___alloc_bootmem_nopanic(unsigned long size,
unsigned long align,
unsigned long goal,
unsigned long limit)
{
-#ifdef CONFIG_NO_BOOTMEM
- void *ptr;
-
- if (WARN_ON_ONCE(slab_is_available()))
- return kzalloc(size, GFP_NOWAIT);
-
-restart:
-
- ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align, goal, limit);
-
- if (ptr)
- return ptr;
-
- if (goal != 0) {
- goal = 0;
- goto restart;
- }
-
- return NULL;
-#else
bootmem_data_t *bdata;
void *region;
@@ -737,7 +628,6 @@ restart:
}
return NULL;
-#endif
}
/**
@@ -758,10 +648,6 @@ void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
{
unsigned long limit = 0;
-#ifdef CONFIG_NO_BOOTMEM
- limit = -1UL;
-#endif
-
return ___alloc_bootmem_nopanic(size, align, goal, limit);
}
@@ -798,14 +684,9 @@ void * __init __alloc_bootmem(unsigned long size, unsigned long align,
{
unsigned long limit = 0;
-#ifdef CONFIG_NO_BOOTMEM
- limit = -1UL;
-#endif
-
return ___alloc_bootmem(size, align, goal, limit);
}
-#ifndef CONFIG_NO_BOOTMEM
static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata,
unsigned long size, unsigned long align,
unsigned long goal, unsigned long limit)
@@ -822,7 +703,6 @@ static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata,
return ___alloc_bootmem(size, align, goal, limit);
}
-#endif
/**
* __alloc_bootmem_node - allocate boot memory from a specific node
@@ -842,24 +722,10 @@ static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata,
void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
unsigned long align, unsigned long goal)
{
- void *ptr;
-
if (WARN_ON_ONCE(slab_is_available()))
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
-#ifdef CONFIG_NO_BOOTMEM
- ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
- goal, -1ULL);
- if (ptr)
- return ptr;
-
- ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align,
- goal, -1ULL);
-#else
- ptr = ___alloc_bootmem_node(pgdat->bdata, size, align, goal, 0);
-#endif
-
- return ptr;
+ return ___alloc_bootmem_node(pgdat->bdata, size, align, goal, 0);
}
void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
@@ -880,13 +746,8 @@ void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
unsigned long new_goal;
new_goal = MAX_DMA32_PFN << PAGE_SHIFT;
-#ifdef CONFIG_NO_BOOTMEM
- ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
- new_goal, -1ULL);
-#else
ptr = alloc_bootmem_core(pgdat->bdata, size, align,
new_goal, 0);
-#endif
if (ptr)
return ptr;
}
@@ -907,16 +768,6 @@ void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
void * __init alloc_bootmem_section(unsigned long size,
unsigned long section_nr)
{
-#ifdef CONFIG_NO_BOOTMEM
- unsigned long pfn, goal, limit;
-
- pfn = section_nr_to_pfn(section_nr);
- goal = pfn << PAGE_SHIFT;
- limit = section_nr_to_pfn(section_nr + 1) << PAGE_SHIFT;
-
- return __alloc_memory_core_early(early_pfn_to_nid(pfn), size,
- SMP_CACHE_BYTES, goal, limit);
-#else
bootmem_data_t *bdata;
unsigned long pfn, goal, limit;
@@ -926,7 +777,6 @@ void * __init alloc_bootmem_section(unsigned long size,
bdata = &bootmem_node_data[early_pfn_to_nid(pfn)];
return alloc_bootmem_core(bdata, size, SMP_CACHE_BYTES, goal, limit);
-#endif
}
#endif
@@ -938,16 +788,11 @@ void * __init __alloc_bootmem_node_nopanic(pg_data_t *pgdat, unsigned long size,
if (WARN_ON_ONCE(slab_is_available()))
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
-#ifdef CONFIG_NO_BOOTMEM
- ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
- goal, -1ULL);
-#else
ptr = alloc_arch_preferred_bootmem(pgdat->bdata, size, align, goal, 0);
if (ptr)
return ptr;
ptr = alloc_bootmem_core(pgdat->bdata, size, align, goal, 0);
-#endif
if (ptr)
return ptr;
@@ -995,21 +840,9 @@ void * __init __alloc_bootmem_low(unsigned long size, unsigned long align,
void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
unsigned long align, unsigned long goal)
{
- void *ptr;
-
if (WARN_ON_ONCE(slab_is_available()))
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
-#ifdef CONFIG_NO_BOOTMEM
- ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
+ return ___alloc_bootmem_node(pgdat->bdata, size, align,
goal, ARCH_LOW_ADDRESS_LIMIT);
- if (ptr)
- return ptr;
- ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align,
- goal, ARCH_LOW_ADDRESS_LIMIT);
-#else
- ptr = ___alloc_bootmem_node(pgdat->bdata, size, align,
- goal, ARCH_LOW_ADDRESS_LIMIT);
-#endif
- return ptr;
}