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ARM: Fix sparsemem with SPARSEMEM_EXTREME enabled

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When SPARSEMEM_EXTREME is enabled, memory_present() wants to use bootmem
to allocate data structures.  However, we call memory_present() after
declaring memory to bootmem, but before we've reserved areas.

This leads to sparsemem data structures being overwritten later in the
kernel's initialization (when slab initializes.)

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2009-10-29 17:06:17 +00:00
parent c06e004c72
commit 657e12fd38
1 changed files with 19 additions and 1 deletions
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20
arch/arm/mm/init.c
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@ -273,7 +273,6 @@ static void __init bootmem_init_node(int node, struct meminfo *mi,
struct membank *bank = &mi->bank[i];
if (!bank->highmem)
free_bootmem_node(pgdat, bank_phys_start(bank), bank_phys_size(bank));
memory_present(node, bank_pfn_start(bank), bank_pfn_end(bank));
}
/*
@ -370,6 +369,19 @@ int pfn_valid(unsigned long pfn)
return 0;
}
EXPORT_SYMBOL(pfn_valid);
static void arm_memory_present(struct meminfo *mi, int node)
{
}
#else
static void arm_memory_present(struct meminfo *mi, int node)
{
int i;
for_each_nodebank(i, mi, node) {
struct membank *bank = &mi->bank[i];
memory_present(node, bank_pfn_start(bank), bank_pfn_end(bank));
}
}
#endif
static int __init meminfo_cmp(const void *_a, const void *_b)
@ -427,6 +439,12 @@ void __init bootmem_init(void)
*/
if (node == initrd_node)
bootmem_reserve_initrd(node);
/*
* Sparsemem tries to allocate bootmem in memory_present(),
* so must be done after the fixed reservations
*/
arm_memory_present(mi, node);
}
/*