b5a0e01132
WARNING: vmlinux.o(.meminit.text+0x649): Section mismatch in reference from the function free_area_init_core() to the function .init.text:setup_usemap() The function __meminit free_area_init_core() references a function __init setup_usemap(). If free_area_init_core is only used by setup_usemap then annotate free_area_init_core with a matching annotation. The warning is covers this stack of functions in mm/page_alloc.c: alloc_bootmem_node must be marked __init. alloc_bootmem_node is used by setup_usemap, if !SPARSEMEM. (usemap_size is only used by setup_usemap, if !SPARSEMEM.) setup_usemap is only used by free_area_init_core. free_area_init_core is only used by free_area_init_node. free_area_init_node is used by: arch/alpha/mm/numa.c: __init paging_init() arch/arm/mm/init.c: __init bootmem_init_node() arch/avr32/mm/init.c: __init paging_init() arch/cris/arch-v10/mm/init.c: __init paging_init() arch/cris/arch-v32/mm/init.c: __init paging_init() arch/m32r/mm/discontig.c: __init zone_sizes_init() arch/m32r/mm/init.c: __init zone_sizes_init() arch/m68k/mm/motorola.c: __init paging_init() arch/m68k/mm/sun3mmu.c: __init paging_init() arch/mips/sgi-ip27/ip27-memory.c: __init paging_init() arch/parisc/mm/init.c: __init paging_init() arch/sparc/mm/srmmu.c: __init srmmu_paging_init() arch/sparc/mm/sun4c.c: __init sun4c_paging_init() arch/sparc64/mm/init.c: __init paging_init() mm/page_alloc.c: __init free_area_init_nodes() mm/page_alloc.c: __init free_area_init() and mm/memory_hotplug.c: hotadd_new_pgdat() hotadd_new_pgdat can not be an __init function, but: It is compiled for MEMORY_HOTPLUG configurations only MEMORY_HOTPLUG depends on SPARSEMEM || X86_64_ACPI_NUMA X86_64_ACPI_NUMA depends on X86_64 ARCH_FLATMEM_ENABLE depends on X86_32 ARCH_DISCONTIGMEM_ENABLE depends on X86_32 So X86_64_ACPI_NUMA implies SPARSEMEM, right? So we can mark the stack of functions __init for !SPARSEMEM, but we must mark them __meminit for SPARSEMEM configurations. This is ok, because then the calls to alloc_bootmem_node are also avoided. Compile-tested on: silly minimal config defconfig x86_32 defconfig x86_64 defconfig x86_64 -HIBERNATION +MEMORY_HOTPLUG Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
/* internal.h: mm/ internal definitions
|
|
*
|
|
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
#ifndef __MM_INTERNAL_H
|
|
#define __MM_INTERNAL_H
|
|
|
|
#include <linux/mm.h>
|
|
|
|
static inline void set_page_count(struct page *page, int v)
|
|
{
|
|
atomic_set(&page->_count, v);
|
|
}
|
|
|
|
/*
|
|
* Turn a non-refcounted page (->_count == 0) into refcounted with
|
|
* a count of one.
|
|
*/
|
|
static inline void set_page_refcounted(struct page *page)
|
|
{
|
|
VM_BUG_ON(PageTail(page));
|
|
VM_BUG_ON(atomic_read(&page->_count));
|
|
set_page_count(page, 1);
|
|
}
|
|
|
|
static inline void __put_page(struct page *page)
|
|
{
|
|
atomic_dec(&page->_count);
|
|
}
|
|
|
|
extern void __init __free_pages_bootmem(struct page *page,
|
|
unsigned int order);
|
|
|
|
/*
|
|
* function for dealing with page's order in buddy system.
|
|
* zone->lock is already acquired when we use these.
|
|
* So, we don't need atomic page->flags operations here.
|
|
*/
|
|
static inline unsigned long page_order(struct page *page)
|
|
{
|
|
VM_BUG_ON(!PageBuddy(page));
|
|
return page_private(page);
|
|
}
|
|
|
|
/*
|
|
* FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node,
|
|
* so all functions starting at paging_init should be marked __init
|
|
* in those cases. SPARSEMEM, however, allows for memory hotplug,
|
|
* and alloc_bootmem_node is not used.
|
|
*/
|
|
#ifdef CONFIG_SPARSEMEM
|
|
#define __paginginit __meminit
|
|
#else
|
|
#define __paginginit __init
|
|
#endif
|
|
|
|
#endif
|