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ARM: ensure membank array is always sorted

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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();