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Subject[PATCH 16/16] x86: remove old bootmem code
Date
Requested by Ingo, Thomas and HPA.

it mean 2.6.34 and 2.6.35 have them bootmem and nobootmem for x86.
and later for x86 will only have nobootmem

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
arch/x86/Kconfig | 10 +-------
arch/x86/kernel/setup.c | 4 ---
arch/x86/mm/init_32.c | 56 -----------------------------------------------
arch/x86/mm/init_64.c | 41 ----------------------------------
arch/x86/mm/memblock.c | 31 --------------------------
arch/x86/mm/numa_32.c | 3 --
arch/x86/mm/numa_64.c | 47 ---------------------------------------
7 files changed, 1 insertions(+), 191 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 4006748..e3a7458 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -586,15 +586,7 @@ config PARAVIRT_DEBUG
a paravirt_op is missing when it is called.

config NO_BOOTMEM
- default y
- bool "Disable Bootmem code"
- ---help---
- Use memblock directly instead of bootmem before slab is ready.
- - allocator (buddy) [generic]
- - early allocator (bootmem) [generic]
- - very early allocator (memblock) [some generic]
- - very very early allocator (early brk model) [x86]
- So reduce one layer between early allocator to final allocator
+ def_bool y

config MEMTEST
bool "Memtest"
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 58d7ece..b721988 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1020,10 +1020,6 @@ void __init setup_arch(char **cmdline_p)

initmem_init(0, max_pfn, acpi, k8);
memblock_find_dma_reserve();
-#ifndef CONFIG_NO_BOOTMEM
- memblock_x86_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
-#endif
-
dma32_reserve_bootmem();

#ifdef CONFIG_KVM_CLOCK
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 49adf16..c2385d7 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -751,68 +751,12 @@ static void __init zone_sizes_init(void)
free_area_init_nodes(max_zone_pfns);
}

-#ifndef CONFIG_NO_BOOTMEM
-static unsigned long __init setup_node_bootmem(int nodeid,
- unsigned long start_pfn,
- unsigned long end_pfn,
- unsigned long bootmap)
-{
- unsigned long bootmap_size;
-
- /* don't touch min_low_pfn */
- bootmap_size = init_bootmem_node(NODE_DATA(nodeid),
- bootmap >> PAGE_SHIFT,
- start_pfn, end_pfn);
- printk(KERN_INFO " node %d low ram: %08lx - %08lx\n",
- nodeid, start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
- printk(KERN_INFO " node %d bootmap %08lx - %08lx\n",
- nodeid, bootmap, bootmap + bootmap_size);
- free_bootmem_with_active_regions(nodeid, end_pfn);
-
- return bootmap + bootmap_size;
-}
-#endif
-
void __init setup_bootmem_allocator(void)
{
-#ifndef CONFIG_NO_BOOTMEM
- int nodeid;
- unsigned long bootmap_size, bootmap;
- /*
- * Initialize the boot-time allocator (with low memory only):
- */
- bootmap_size = bootmem_bootmap_pages(max_low_pfn)<<PAGE_SHIFT;
- bootmap = memblock_find_in_range(0, max_pfn_mapped<<PAGE_SHIFT, bootmap_size,
- PAGE_SIZE);
- if (bootmap == MEMBLOCK_ERROR)
- panic("Cannot find bootmem map of size %ld\n", bootmap_size);
- memblock_x86_reserve_range(bootmap, bootmap + bootmap_size, "BOOTMAP");
-#endif
-
printk(KERN_INFO " mapped low ram: 0 - %08lx\n",
max_pfn_mapped<<PAGE_SHIFT);
printk(KERN_INFO " low ram: 0 - %08lx\n", max_low_pfn<<PAGE_SHIFT);

-#ifndef CONFIG_NO_BOOTMEM
- for_each_online_node(nodeid) {
- unsigned long start_pfn, end_pfn;
-
-#ifdef CONFIG_NEED_MULTIPLE_NODES
- start_pfn = node_start_pfn[nodeid];
- end_pfn = node_end_pfn[nodeid];
- if (start_pfn > max_low_pfn)
- continue;
- if (end_pfn > max_low_pfn)
- end_pfn = max_low_pfn;
-#else
- start_pfn = 0;
- end_pfn = max_low_pfn;
-#endif
- bootmap = setup_node_bootmem(nodeid, start_pfn, end_pfn,
- bootmap);
- }
-#endif
-
after_bootmem = 1;
}

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index d6d4084..690b8d1 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -572,23 +572,7 @@ kernel_physical_mapping_init(unsigned long start,
void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn,
int acpi, int k8)
{
-#ifndef CONFIG_NO_BOOTMEM
- unsigned long bootmap_size, bootmap;
-
- bootmap_size = bootmem_bootmap_pages(end_pfn)<<PAGE_SHIFT;
- bootmap = memblock_find_in_range(0, end_pfn<<PAGE_SHIFT, bootmap_size,
- PAGE_SIZE);
- if (bootmap == MEMBLOCK_ERROR)
- panic("Cannot find bootmem map of size %ld\n", bootmap_size);
- memblock_x86_reserve_range(bootmap, bootmap + bootmap_size, "BOOTMAP");
- /* don't touch min_low_pfn */
- bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
- 0, end_pfn);
memblock_x86_register_active_regions(0, start_pfn, end_pfn);
- free_bootmem_with_active_regions(0, end_pfn);
-#else
- memblock_x86_register_active_regions(0, start_pfn, end_pfn);
-#endif
}
#endif

@@ -798,31 +782,6 @@ void mark_rodata_ro(void)

#endif

-#ifndef CONFIG_NO_BOOTMEM
-int __init reserve_bootmem_generic(unsigned long phys, unsigned long len,
- int flags)
-{
- unsigned long pfn = phys >> PAGE_SHIFT;
-
- if (pfn >= max_pfn) {
- /*
- * This can happen with kdump kernels when accessing
- * firmware tables:
- */
- if (pfn < max_pfn_mapped)
- return -EFAULT;
-
- printk(KERN_ERR "reserve_bootmem: illegal reserve %lx %lu\n",
- phys, len);
- return -EFAULT;
- }
-
- reserve_bootmem(phys, len, flags);
-
- return 0;
-}
-#endif
-
int kern_addr_valid(unsigned long addr)
{
unsigned long above = ((long)addr) >> __VIRTUAL_MASK_SHIFT;
diff --git a/arch/x86/mm/memblock.c b/arch/x86/mm/memblock.c
index 70a6bba..104701b 100644
--- a/arch/x86/mm/memblock.c
+++ b/arch/x86/mm/memblock.c
@@ -109,7 +109,6 @@ static __init struct range *find_range_array(int count)
return range;
}

-#ifdef CONFIG_NO_BOOTMEM
static void __init memblock_x86_subtract_reserved(struct range *range, int az)
{
int count;
@@ -186,36 +185,6 @@ int __init get_free_all_memory_range(struct range **rangep, int nodeid)
*rangep = range;
return nr_range;
}
-#else
-void __init memblock_x86_to_bootmem(u64 start, u64 end)
-{
- int count;
- u64 final_start, final_end;
- struct memblock_region *r;
-
- /* Take out region array itself */
- if (memblock.reserved.regions != memblock_reserved_init_regions)
- memblock_free(__pa(memblock.reserved.regions), sizeof(struct memblock_region) * memblock.reserved.max);
-
- count = memblock.reserved.cnt;
- memblock_dbg("(%d early reservations) ==> bootmem [%#010llx-%#010llx]\n", count, start, end - 1);
- for_each_memblock(reserved, r) {
- memblock_dbg(" [%#010llx-%#010llx] ", (u64)r->base, (u64)r->base + r->size - 1);
- final_start = max(start, r->base);
- final_end = min(end, r->base + r->size);
- if (final_start >= final_end) {
- memblock_dbg("\n");
- continue;
- }
- memblock_dbg(" ==> [%#010llx-%#010llx]\n", final_start, final_end - 1);
- reserve_bootmem_generic(final_start, final_end - final_start, BOOTMEM_DEFAULT);
- }
-
- /* Put region array back ? */
- if (memblock.reserved.regions != memblock_reserved_init_regions)
- memblock_reserve(__pa(memblock.reserved.regions), sizeof(struct memblock_region) * memblock.reserved.max);
-}
-#endif

static u64 __init __memblock_x86_memory_in_range(u64 addr, u64 limit, bool get_free)
{
diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index ddf9730..70ddeb7 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -420,9 +420,6 @@ void __init initmem_init(unsigned long start_pfn, unsigned long end_pfn,
for_each_online_node(nid) {
memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
NODE_DATA(nid)->node_id = nid;
-#ifndef CONFIG_NO_BOOTMEM
- NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
-#endif
}

setup_bootmem_allocator();
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 984b1ff..aef0ff7 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -199,10 +199,6 @@ setup_node_bootmem(int nodeid, unsigned long start, unsigned long end)
unsigned long start_pfn, last_pfn, nodedata_phys;
const int pgdat_size = roundup(sizeof(pg_data_t), PAGE_SIZE);
int nid;
-#ifndef CONFIG_NO_BOOTMEM
- unsigned long bootmap_start, bootmap_pages, bootmap_size;
- void *bootmap;
-#endif

if (!end)
return;
@@ -239,47 +235,6 @@ setup_node_bootmem(int nodeid, unsigned long start, unsigned long end)
NODE_DATA(nodeid)->node_start_pfn = start_pfn;
NODE_DATA(nodeid)->node_spanned_pages = last_pfn - start_pfn;

-#ifndef CONFIG_NO_BOOTMEM
- NODE_DATA(nodeid)->bdata = &bootmem_node_data[nodeid];
-
- /*
- * Find a place for the bootmem map
- * nodedata_phys could be on other nodes by alloc_bootmem,
- * so need to sure bootmap_start not to be small, otherwise
- * early_node_mem will get that with memblock_find_in_range instead
- * of alloc_bootmem, that could clash with reserved range
- */
- bootmap_pages = bootmem_bootmap_pages(last_pfn - start_pfn);
- bootmap_start = roundup(nodedata_phys + pgdat_size, PAGE_SIZE);
- /*
- * SMP_CACHE_BYTES could be enough, but init_bootmem_node like
- * to use that to align to PAGE_SIZE
- */
- bootmap = early_node_mem(nodeid, bootmap_start, end,
- bootmap_pages<<PAGE_SHIFT, PAGE_SIZE);
- if (bootmap == NULL) {
- memblock_x86_free_range(nodedata_phys, nodedata_phys + pgdat_size);
- node_data[nodeid] = NULL;
- return;
- }
- bootmap_start = __pa(bootmap);
- memblock_x86_reserve_range(bootmap_start, bootmap_start+(bootmap_pages<<PAGE_SHIFT),
- "BOOTMAP");
-
- bootmap_size = init_bootmem_node(NODE_DATA(nodeid),
- bootmap_start >> PAGE_SHIFT,
- start_pfn, last_pfn);
-
- printk(KERN_INFO " bootmap [%016lx - %016lx] pages %lx\n",
- bootmap_start, bootmap_start + bootmap_size - 1,
- bootmap_pages);
- nid = phys_to_nid(bootmap_start);
- if (nid != nodeid)
- printk(KERN_INFO " bootmap(%d) on node %d\n", nodeid, nid);
-
- free_bootmem_with_active_regions(nodeid, end);
-#endif
-
node_set_online(nodeid);
}

@@ -704,9 +659,7 @@ unsigned long __init numa_free_all_bootmem(void)
for_each_online_node(i)
pages += free_all_bootmem_node(NODE_DATA(i));

-#ifdef CONFIG_NO_BOOTMEM
pages += free_all_memory_core_early(MAX_NUMNODES);
-#endif

return pages;
}
--
1.6.4.2


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