user/sven/linux.git/include/linux/memblock.h, branch v3.0.85

memblock: add error return when CONFIG_HAVE_MEMBLOCK is not set

2011-05-25T15:39:48Z

On larger systems, information in the kernel log is lost because there is so much early text printed, that it overflows the static log buffer before the log_buf_len kernel parameter can be processed, and a bigger log buffer allocated. Distros are relunctant to increase memory usage by increasing the size of the static log buffer, so minimize the problem by allocating the new log buffer as early as possible. This patch: Add an error return if CONFIG_HAVE_MEMBLOCK is not set instead of having to add #ifdef CONFIG_HAVE_MEMBLOCK around blocks of code calling that function. Signed-off-by: Mike Travis Cc: Yinghai Lu Cc: "H. Peter Anvin" Cc: Jack Steiner Cc: Thomas Gleixner Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

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

2010-10-12T22:37:51Z

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

2010-09-15T20:17:13Z

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()

2010-08-27T18:07:56Z

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()

2010-08-05T02:56:34Z

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

2010-08-05T02:56:33Z

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

2010-08-05T02:56:32Z

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

2010-08-05T02:56:30Z

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

2010-08-05T02:56:29Z

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

2010-08-05T02:56:27Z

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