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mm: free_area_init: use maximal zone PFNs rather than zone sizes 

Currently, architectures that use free_area_init() to initialize memory
map and node and zone structures need to calculate zone and hole sizes.
We can use free_area_init_nodes() instead and let it detect the zone
boundaries while the architectures will only have to supply the possible
limits for the zones.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Hoan Tran <hoan@os.amperecomputing.com>	[arm64]
Reviewed-by: Baoquan He <bhe@redhat.com>
Cc: Brian Cain <bcain@codeaurora.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Ungerer <gerg@linux-m68k.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: http://lkml.kernel.org/r/20200412194859.12663-5-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Rapoport 2020-06-03 15:57:06 -07:00 committed by Linus Torvalds
parent 3f08a302f5
commit fa3354e4ea
12 changed files with 38 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/alpha/mm/init.c
View File

@ -243,21 +243,17 @@ callback_init(void * kernel_end)
*/
void __init paging_init(void)
{
unsigned long zones_size[MAX_NR_ZONES] = {0, };
unsigned long dma_pfn, high_pfn;
unsigned long max_zone_pfn[MAX_NR_ZONES] = {0, };
unsigned long dma_pfn;
dma_pfn = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
high_pfn = max_pfn = max_low_pfn;
max_pfn = max_low_pfn;
if (dma_pfn >= high_pfn)
zones_size[ZONE_DMA] = high_pfn;
else {
zones_size[ZONE_DMA] = dma_pfn;
zones_size[ZONE_NORMAL] = high_pfn - dma_pfn;
}
max_zone_pfn[ZONE_DMA] = dma_pfn;
max_zone_pfn[ZONE_NORMAL] = max_pfn;
/* Initialize mem_map[]. */
free_area_init(zones_size);
free_area_init(max_zone_pfn);
/* Initialize the kernel's ZERO_PGE. */
memset((void *)ZERO_PGE, 0, PAGE_SIZE);

8
arch/c6x/mm/init.c
View File

@ -33,7 +33,7 @@ EXPORT_SYMBOL(empty_zero_page);
void __init paging_init(void)
{
struct pglist_data *pgdat = NODE_DATA(0);
unsigned long zones_size[MAX_NR_ZONES] = {0, };
unsigned long max_zone_pfn[MAX_NR_ZONES] = {0, };
empty_zero_page = (unsigned long) memblock_alloc(PAGE_SIZE,
PAGE_SIZE);
@ -49,11 +49,9 @@ void __init paging_init(void)
/*
* Define zones
*/
zones_size[ZONE_NORMAL] = (memory_end - PAGE_OFFSET) >> PAGE_SHIFT;
pgdat->node_zones[ZONE_NORMAL].zone_start_pfn =
__pa(PAGE_OFFSET) >> PAGE_SHIFT;
max_zone_pfn[ZONE_NORMAL] = memory_end >> PAGE_SHIFT;
free_area_init(zones_size);
free_area_init(max_zone_pfn);
}
void __init mem_init(void)

6
arch/h8300/mm/init.c
View File

@ -83,10 +83,10 @@ void __init paging_init(void)
start_mem, end_mem);
{
unsigned long zones_size[MAX_NR_ZONES] = {0, };
unsigned long max_zone_pfn[MAX_NR_ZONES] = {0, };
zones_size[ZONE_NORMAL] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
free_area_init(zones_size);
max_zone_pfn[ZONE_NORMAL] = end_mem >> PAGE_SHIFT;
free_area_init(max_zone_pfn);
}
}

6
arch/hexagon/mm/init.c
View File

@ -91,7 +91,7 @@ void sync_icache_dcache(pte_t pte)
*/
void __init paging_init(void)
{
unsigned long zones_sizes[MAX_NR_ZONES] = {0, };
unsigned long max_zone_pfn[MAX_NR_ZONES] = {0, };
/*
* This is not particularly well documented anywhere, but
@ -101,9 +101,9 @@ void __init paging_init(void)
* adjust accordingly.
*/
zones_sizes[ZONE_NORMAL] = max_low_pfn;
max_zone_pfn[ZONE_NORMAL] = max_low_pfn;
free_area_init(zones_sizes); /* sets up the zonelists and mem_map */
free_area_init(max_zone_pfn); /* sets up the zonelists and mem_map */
/*
* Start of high memory area. Will probably need something more

6
arch/m68k/mm/init.c
View File

@ -84,7 +84,7 @@ void __init paging_init(void)
* page_alloc get different views of the world.
*/
unsigned long end_mem = memory_end & PAGE_MASK;
unsigned long zones_size[MAX_NR_ZONES] = { 0, };
unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0, };
high_memory = (void *) end_mem;
@ -98,8 +98,8 @@ void __init paging_init(void)
*/
set_fs (USER_DS);
zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
free_area_init(zones_size);
max_zone_pfn[ZONE_DMA] = end_mem >> PAGE_SHIFT;
free_area_init(max_zone_pfn);
}
#endif /* CONFIG_MMU */

9
arch/m68k/mm/mcfmmu.c
View File

@ -39,7 +39,7 @@ void __init paging_init(void)
pte_t *pg_table;
unsigned long address, size;
unsigned long next_pgtable, bootmem_end;
unsigned long zones_size[MAX_NR_ZONES];
unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
enum zone_type zone;
int i;
@ -80,11 +80,8 @@ void __init paging_init(void)
}
current->mm = NULL;
for (zone = 0; zone < MAX_NR_ZONES; zone++)
zones_size[zone] = 0x0;
zones_size[ZONE_DMA] = num_pages;
free_area_init(zones_size);
max_zone_pfn[ZONE_DMA] = PFN_DOWN(_ramend);
free_area_init(max_zone_pfn);
}
int cf_tlb_miss(struct pt_regs *regs, int write, int dtlb, int extension_word)

11
arch/nds32/mm/init.c
View File

@ -31,16 +31,13 @@ EXPORT_SYMBOL(empty_zero_page);
static void __init zone_sizes_init(void)
{
unsigned long zones_size[MAX_NR_ZONES];
unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
/* Clear the zone sizes */
memset(zones_size, 0, sizeof(zones_size));
zones_size[ZONE_NORMAL] = max_low_pfn;
max_zone_pfn[ZONE_NORMAL] = max_low_pfn;
#ifdef CONFIG_HIGHMEM
zones_size[ZONE_HIGHMEM] = max_pfn;
max_zone_pfn[ZONE_HIGHMEM] = max_pfn;
#endif
free_area_init(zones_size);
free_area_init(max_zone_pfn);
}

8
arch/nios2/mm/init.c
View File

@ -46,17 +46,15 @@ pgd_t *pgd_current;
*/
void __init paging_init(void)
{
unsigned long zones_size[MAX_NR_ZONES];
memset(zones_size, 0, sizeof(zones_size));
unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
pagetable_init();
pgd_current = swapper_pg_dir;
zones_size[ZONE_NORMAL] = max_mapnr;
max_zone_pfn[ZONE_NORMAL] = max_mapnr;
/* pass the memory from the bootmem allocator to the main allocator */
free_area_init(zones_size);
free_area_init(max_zone_pfn);
flush_dcache_range((unsigned long)empty_zero_page,
(unsigned long)empty_zero_page + PAGE_SIZE);

9
arch/openrisc/mm/init.c
View File

@ -45,17 +45,14 @@ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
static void __init zone_sizes_init(void)
{
unsigned long zones_size[MAX_NR_ZONES];
/* Clear the zone sizes */
memset(zones_size, 0, sizeof(zones_size));
unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
/*
* We use only ZONE_NORMAL
*/
zones_size[ZONE_NORMAL] = max_low_pfn;
max_zone_pfn[ZONE_NORMAL] = max_low_pfn;
free_area_init(zones_size);
free_area_init(max_zone_pfn);
}
extern const char _s_kernel_ro[], _e_kernel_ro[];

12
arch/um/kernel/mem.c
View File

@ -158,8 +158,8 @@ static void __init fixaddr_user_init( void)
void __init paging_init(void)
{
unsigned long zones_size[MAX_NR_ZONES], vaddr;
int i;
unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
unsigned long vaddr;
empty_zero_page = (unsigned long *) memblock_alloc_low(PAGE_SIZE,
PAGE_SIZE);
@ -167,12 +167,8 @@ void __init paging_init(void)
panic("%s: Failed to allocate %lu bytes align=%lx\n",
__func__, PAGE_SIZE, PAGE_SIZE);
for (i = 0; i < ARRAY_SIZE(zones_size); i++)
zones_size[i] = 0;
zones_size[ZONE_NORMAL] = (end_iomem >> PAGE_SHIFT) -
(uml_physmem >> PAGE_SHIFT);
free_area_init(zones_size);
max_zone_pfn[ZONE_NORMAL] = end_iomem >> PAGE_SHIFT;
free_area_init(max_zone_pfn);
/*
* Fixed mappings, only the page table structure has to be

2
include/linux/mm.h
View File

@ -2329,7 +2329,7 @@ static inline spinlock_t *pud_lock(struct mm_struct *mm, pud_t *pud)
}
extern void __init pagecache_init(void);
extern void free_area_init(unsigned long * zones_size);
extern void free_area_init(unsigned long * max_zone_pfn);
extern void __init free_area_init_node(int nid, unsigned long * zones_size,
unsigned long zone_start_pfn, unsigned long *zholes_size);
extern void free_initmem(void);

5
mm/page_alloc.c
View File

@ -7712,11 +7712,10 @@ void __init set_dma_reserve(unsigned long new_dma_reserve)
dma_reserve = new_dma_reserve;
}
void __init free_area_init(unsigned long *zones_size)
void __init free_area_init(unsigned long *max_zone_pfn)
{
init_unavailable_mem();
free_area_init_node(0, zones_size,
__pa(PAGE_OFFSET) >> PAGE_SHIFT, NULL);
free_area_init_nodes(max_zone_pfn);
}
static int page_alloc_cpu_dead(unsigned int cpu)