powerpc/mm: Fix memory_block_size_bytes() for non-pseries
authorBenjamin Herrenschmidt <benh@kernel.crashing.org>
Tue, 14 Jun 2011 00:57:51 +0000 (10:57 +1000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Tue, 12 Jul 2011 01:16:45 +0000 (11:16 +1000)
commit770e1ac5f29003fca18af4e67eb5a05ddb5b1491
tree71a5f1e9efb001a4f46bc077c024dedd1f94a835
parenta63fdc5156f2ef5690b6cf03d72b0c4917efbba7
powerpc/mm: Fix memory_block_size_bytes() for non-pseries

Just compiling pseries in the kernel causes it to override
memory_block_size_bytes() regardless of what is the runtime
platform.

This cleans up the implementation of that function, fixing
a bug or two while at it, so that it's harmless (and potentially
useful) for other platforms. Without this, bugs in that code
would trigger a WARN_ON() in drivers/base/memory.c when
booting some different platforms.

If/when we have another platform supporting memory hotplug we
might want to either move that out to a generic place or
make it a ppc_md. callback.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
arch/powerpc/platforms/pseries/hotplug-memory.c