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ARM: ensure membank array is always sorted 

This was missing from the noMMU code, so there was the possibility
of things not working as expected if out of order memory information
was passed.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2010-10-27 18:14:56 +01:00
parent c8c90860cd
commit 7dc50ec728
2 changed files with 10 additions and 10 deletions
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10
arch/arm/mm/init.c
View File

@ -18,6 +18,7 @@
#include <linux/highmem.h>
#include <linux/gfp.h>
#include <linux/memblock.h>
#include <linux/sort.h>
#include <asm/mach-types.h>
#include <asm/sections.h>
@ -256,10 +257,19 @@ static void arm_memory_present(void)
}
#endif
static int __init meminfo_cmp(const void *_a, const void *_b)
{
const struct membank *a = _a, *b = _b;
long cmp = bank_pfn_start(a) - bank_pfn_start(b);
return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
}
void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc)
{
int i;
sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL);
memblock_init();
for (i = 0; i < mi->nr_banks; i++)
memblock_add(mi->bank[i].start, mi->bank[i].size);

10
arch/arm/mm/mmu.c
View File

@ -14,7 +14,6 @@
#include <linux/mman.h>
#include <linux/nodemask.h>
#include <linux/memblock.h>
#include <linux/sort.h>
#include <linux/fs.h>
#include <asm/cputype.h>
@ -1011,13 +1010,6 @@ static void __init map_lowmem(void)
}
}
static int __init meminfo_cmp(const void *_a, const void *_b)
{
const struct membank *a = _a, *b = _b;
long cmp = bank_pfn_start(a) - bank_pfn_start(b);
return cmp < 0 ? -1 : cmp > 0 ? 1 : 0;
}
/*
* paging_init() sets up the page tables, initialises the zone memory
* maps, and sets up the zero page, bad page and bad page tables.
@ -1026,8 +1018,6 @@ void __init paging_init(struct machine_desc *mdesc)
{
void *zero_page;
sort(&meminfo.bank, meminfo.nr_banks, sizeof(meminfo.bank[0]), meminfo_cmp, NULL);
build_mem_type_table();
sanity_check_meminfo();
prepare_page_table();