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author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-07-06 15:39:01 -0700 |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-08-05 12:56:07 +1000 |
commit | e63075a3c9377536d085bc013cd3fe6323162449 (patch) | |
tree | 28fde124dde6df867947882fc686d228502846df /arch/powerpc/mm/ppc_mmu_32.c | |
parent | 27f574c223d2c09610058b3ec7a29582d63a3e06 (diff) | |
download | blackbird-op-linux-e63075a3c9377536d085bc013cd3fe6323162449.tar.gz blackbird-op-linux-e63075a3c9377536d085bc013cd3fe6323162449.zip |
memblock: Introduce default allocation limit and use it to replace explicit ones
This introduce memblock.current_limit which is used to limit allocations
from memblock_alloc() or memblock_alloc_base(..., MEMBLOCK_ALLOC_ACCESSIBLE).
The old MEMBLOCK_ALLOC_ANYWHERE changes value from 0 to ~(u64)0 and can still
be used with memblock_alloc_base() to allocate really anywhere.
It is -no-longer- cropped to MEMBLOCK_REAL_LIMIT which disappears.
Note to archs: I'm leaving the default limit to MEMBLOCK_ALLOC_ANYWHERE. I
strongly recommend that you ensure that you set an appropriate limit
during boot in order to guarantee that an memblock_alloc() at any time
results in something that is accessible with a simple __va().
The reason is that a subsequent patch will introduce the ability for
the array to resize itself by reallocating itself. The MEMBLOCK core will
honor the current limit when performing those allocations.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm/ppc_mmu_32.c')
-rw-r--r-- | arch/powerpc/mm/ppc_mmu_32.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c index f8a01829d64f..7d34e170e80f 100644 --- a/arch/powerpc/mm/ppc_mmu_32.c +++ b/arch/powerpc/mm/ppc_mmu_32.c @@ -223,8 +223,7 @@ void __init MMU_init_hw(void) * Find some memory for the hash table. */ if ( ppc_md.progress ) ppc_md.progress("hash:find piece", 0x322); - Hash = __va(memblock_alloc_base(Hash_size, Hash_size, - __initial_memory_limit_addr)); + Hash = __va(memblock_alloc(Hash_size, Hash_size)); cacheable_memzero(Hash, Hash_size); _SDR1 = __pa(Hash) | SDR1_LOW_BITS; |