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mm: remove unnecessary ia64 code and comment
IA64 has gone with commit cf8e865810
("arch: Remove Itanium (IA-64)
architecture"), remove unnecessary ia64 special mm code and comment too.
Link: https://lkml.kernel.org/r/20231222070203.2966980-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Mike Rapoport (IBM) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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4a8ffab02d
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@ -770,7 +770,7 @@ config DEFAULT_MMAP_MIN_ADDR
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from userspace allocation. Keeping a user from writing to low pages
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can help reduce the impact of kernel NULL pointer bugs.
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For most ia64, ppc64 and x86 users with lots of address space
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For most ppc64 and x86 users with lots of address space
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a value of 65536 is reasonable and should cause no problems.
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On arm and other archs it should not be higher than 32768.
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Programs which use vm86 functionality or have some need to map
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@ -123,9 +123,7 @@ static bool vmf_orig_pte_uffd_wp(struct vm_fault *vmf)
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/*
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* A number of key systems in x86 including ioremap() rely on the assumption
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* that high_memory defines the upper bound on direct map memory, then end
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* of ZONE_NORMAL. Under CONFIG_DISCONTIG this means that max_low_pfn and
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* highstart_pfn must be the same; there must be no gap between ZONE_NORMAL
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* and ZONE_HIGHMEM.
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* of ZONE_NORMAL.
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*/
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void *high_memory;
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EXPORT_SYMBOL(high_memory);
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48
mm/mm_init.c
48
mm/mm_init.c
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@ -1467,8 +1467,7 @@ void __init set_pageblock_order(void)
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/*
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* Assume the largest contiguous order of interest is a huge page.
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* This value may be variable depending on boot parameters on IA64 and
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* powerpc.
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* This value may be variable depending on boot parameters on powerpc.
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*/
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pageblock_order = order;
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}
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@ -1629,8 +1628,8 @@ void __init *memmap_alloc(phys_addr_t size, phys_addr_t align,
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#ifdef CONFIG_FLATMEM
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static void __init alloc_node_mem_map(struct pglist_data *pgdat)
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{
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unsigned long __maybe_unused start = 0;
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unsigned long __maybe_unused offset = 0;
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unsigned long start, offset, size, end;
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struct page *map;
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/* Skip empty nodes */
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if (!pgdat->node_spanned_pages)
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@ -1638,33 +1637,24 @@ static void __init alloc_node_mem_map(struct pglist_data *pgdat)
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start = pgdat->node_start_pfn & ~(MAX_ORDER_NR_PAGES - 1);
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offset = pgdat->node_start_pfn - start;
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/* ia64 gets its own node_mem_map, before this, without bootmem */
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if (!pgdat->node_mem_map) {
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unsigned long size, end;
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struct page *map;
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/*
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* The zone's endpoints aren't required to be MAX_ORDER
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* aligned but the node_mem_map endpoints must be in order
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* for the buddy allocator to function correctly.
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*/
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end = pgdat_end_pfn(pgdat);
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end = ALIGN(end, MAX_ORDER_NR_PAGES);
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size = (end - start) * sizeof(struct page);
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map = memmap_alloc(size, SMP_CACHE_BYTES, MEMBLOCK_LOW_LIMIT,
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pgdat->node_id, false);
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if (!map)
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panic("Failed to allocate %ld bytes for node %d memory map\n",
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size, pgdat->node_id);
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pgdat->node_mem_map = map + offset;
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}
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pr_debug("%s: node %d, pgdat %08lx, node_mem_map %08lx\n",
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__func__, pgdat->node_id, (unsigned long)pgdat,
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(unsigned long)pgdat->node_mem_map);
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#ifndef CONFIG_NUMA
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/*
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* With no DISCONTIG, the global mem_map is just set as node 0's
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* The zone's endpoints aren't required to be MAX_ORDER
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* aligned but the node_mem_map endpoints must be in order
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* for the buddy allocator to function correctly.
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*/
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end = ALIGN(pgdat_end_pfn(pgdat), MAX_ORDER_NR_PAGES);
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size = (end - start) * sizeof(struct page);
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map = memmap_alloc(size, SMP_CACHE_BYTES, MEMBLOCK_LOW_LIMIT,
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pgdat->node_id, false);
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if (!map)
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panic("Failed to allocate %ld bytes for node %d memory map\n",
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size, pgdat->node_id);
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pgdat->node_mem_map = map + offset;
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pr_debug("%s: node %d, pgdat %08lx, node_mem_map %08lx\n",
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__func__, pgdat->node_id, (unsigned long)pgdat,
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(unsigned long)pgdat->node_mem_map);
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#ifndef CONFIG_NUMA
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/* the global mem_map is just set as node 0's */
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if (pgdat == NODE_DATA(0)) {
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mem_map = NODE_DATA(0)->node_mem_map;
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if (page_to_pfn(mem_map) != pgdat->node_start_pfn)
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@ -121,7 +121,6 @@ static noinline depot_stack_handle_t save_stack(gfp_t flags)
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* Sometimes page metadata allocation tracking requires more
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* memory to be allocated:
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* - when new stack trace is saved to stack depot
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* - when backtrace itself is calculated (ia64)
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*/
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if (current->in_page_owner)
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return dummy_handle;
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