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| author | Sam Ravnborg <sam@ravnborg.org> | 2011-11-01 01:08:16 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-01 01:30:47 +0100 |
| commit | 0a93ebef698b08ed04af0d7d913bab8aedfdc253 (patch) | |
| tree | dcdb4bba9355647dd060d9150422537ad126442a /mm | |
| parent | mm: avoid null pointer access in vm_struct via /proc/vmallocinfo (diff) | |
| download | linux-0a93ebef698b08ed04af0d7d913bab8aedfdc253.tar.xz linux-0a93ebef698b08ed04af0d7d913bab8aedfdc253.zip | |
memblock: add memblock_start_of_DRAM()
SPARC32 require access to the start address. Add a new helper
memblock_start_of_DRAM() to give access to the address of the first
memblock - which contains the lowest address.
The awkward name was chosen to match the already present
memblock_end_of_DRAM().
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Yinghai Lu <yinghai@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memblock.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/memblock.c b/mm/memblock.c index ccbf97339592..b7ed63633581 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -626,6 +626,12 @@ phys_addr_t __init memblock_phys_mem_size(void) return memblock.memory_size; } +/* lowest address */ +phys_addr_t __init_memblock memblock_start_of_DRAM(void) +{ + return memblock.memory.regions[0].base; +} + phys_addr_t __init_memblock memblock_end_of_DRAM(void) { int idx = memblock.memory.cnt - 1; |