From: David S. Miller <davem@sunset.davemloft.net>
Date: Fri, 17 Mar 2006 22:41:03 +0000 (-0800)
Subject: [SPARC64]: Top-down address space allocation for 32-bit tasks.
X-Git-Tag: v2.6.17-rc1~1184^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a91690ddd05ab0b7fbdd37733875525ac75c20f2;p=pandora-kernel.git

[SPARC64]: Top-down address space allocation for 32-bit tasks.

Currently allocations are very constrained for 32-bit processes.
It grows down-up from 0x70000000 to 0xf0000000 which gives about
2GB of stack + dynamic mmap() space.

So support the top-down method, and we need to override the
generic helper function in order to deal with D-cache coloring.

With these changes I was able to squeeze out a mmap() just over
3.6GB in size in a 32-bit process.

Signed-off-by: David S. Miller <davem@davemloft.net>
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