linux-toradex.git/include/linux/memblock.h, branch v2.6.38.5

memblock, bootmem: Round pfn properly for memory and reserved regions

2010-10-12T22:37:51+00:00

We need to round memory regions correctly -- specifically, we need to
round reserved region in the more expansive direction (lower limit
down, upper limit up) whereas usable memory regions need to be rounded
in the more restrictive direction (lower limit up, upper limit down).

This introduces two set of inlines:

	memblock_region_memory_base_pfn()
	memblock_region_memory_end_pfn()
	memblock_region_reserved_base_pfn()
	memblock_region_reserved_end_pfn()

Although they are antisymmetric (and therefore are technically
duplicates) the use of the different inlines explicitly documents the
programmer's intention.

The lack of proper rounding caused a bug on ARM, which was then found
to also affect other architectures.

Reported-by: Russell King 
Signed-off-by: Yinghai Lu 
LKML-Reference: <4CB4CDFD.4020105@kernel.org>
Cc: Jeremy Fitzhardinge 
Signed-off-by: H. Peter Anvin

memblock: Fix section mismatch warnings

2010-09-15T20:17:13+00:00

Stephen found a bunch of section mismatch warnings with the
new memblock changes.

Use __init_memblock to replace __init in memblock.c and remove
__init in memblock.h. We should not use __init in header files.

Reported-by: Stephen Rothwell 
Tested-by: Stephen Rothwell 
Signed-off-by: Yinghai Lu 
Cc: Peter Zijlstra 
Cc: Benjamin Herrenschmidt 
LKML-Reference: <4C912709.2090201@kernel.org>
Signed-off-by: Ingo Molnar

memblock: Add memblock_free/reserve_reserved_regions()

2010-08-27T18:07:56+00:00

So we can avoid export memblock_reserved_init_regions()
Suggested by Ben.

-v2: use __init_memblock attribute

Signed-off-by: Yinghai Lu 
Cc: Benjamin Herrenschmidt 
Signed-off-by: H. Peter Anvin

memblock: Add memblock_find_in_range()

2010-08-05T02:56:34+00:00

This is a wrapper for memblock_find_base() using slightly different
arguments (start,end instead of start,size for example) in order to
make it easier to convert existing arch/x86 code.

Signed-off-by: Yinghai Lu 
Signed-off-by: Benjamin Herrenschmidt

memblock: Option for the architecture to put memblock into the .init section

2010-08-05T02:56:33+00:00

Arch code can define ARCH_DISCARD_MEMBLOCK in asm/memblock.h,
which in turns causes memblock code and data to go respectively
into the .init and .initdata sections. This will be used by the
x86 architecture.

If ARCH_DISCARD_MEMBLOCK is defined, the debugfs files to inspect
the memblock arrays after boot are not created.

Signed-off-by: Yinghai Lu 
Signed-off-by: Benjamin Herrenschmidt

memblock: Protect memblock.h with CONFIG_HAVE_MEMBLOCK

2010-08-05T02:56:32+00:00

This should make it easier to catch/debug incorrect use when
the CONFIG_ option isn't set.

Signed-off-by: Yinghai Lu 
Signed-off-by: Benjamin Herrenschmidt

memblock: Make MEMBLOCK_ERROR be 0

2010-08-05T02:56:30+00:00

And ensure we don't hand out 0 as a valid allocation. We put the
low limit at PAGE_SIZE arbitrarily.

Signed-off-by: Benjamin Herrenschmidt

memblock: Export MEMBLOCK_ERROR

2010-08-05T02:56:29+00:00

will used by x86 memblock_x86_find_in_range_node and nobootmem replacement

Signed-off-by: Yinghai Lu 
Signed-off-by: Benjamin Herrenschmidt

memblock: Expose some memblock bits for use by x86

2010-08-05T02:56:27+00:00

This exposes memblock_debug and associated memblock_dbg() macro,
along with memblock_can_resize so that x86 can use these when
ported to use memblock

Signed-off-by: Yinghai Lu 
Signed-off-by: Benjamin Herrenschmidt

memblock: Separate memblock_alloc_nid() and memblock_alloc_try_nid()

2010-08-05T02:56:24+00:00

The former is now strict, it will fail if it cannot honor the allocation
within the node, while the later implements the previous semantic which
falls back to allocating anywhere.

Signed-off-by: Benjamin Herrenschmidt