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| author |   Russell King <rmk+kernel@arm.linux.org.uk> | 2009-10-29 17:06:17 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-10-29 17:06:17 +0000 |
| commit | 657e12fd388899502d47f9f6f9d276ec9ced8add (patch) | |
| tree | cce20de56800ea3b63159e8db69577e761f4e094 /arch/arm | |
| parent | ARM: Use GFP_DMA only for masks _less_ than 32-bit (diff) | |
| download | linux-dev-657e12fd388899502d47f9f6f9d276ec9ced8add.tar.xz linux-dev-657e12fd388899502d47f9f6f9d276ec9ced8add.zip | |
ARM: Fix sparsemem with SPARSEMEM_EXTREME enabled
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>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mm/init.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 40940d7ce4ff..52c40d155672 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -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); } /* |