Fix alloc_node_mem_map() to work on ia64 again
authorTony Luck <tony.luck@intel.com>
Tue, 10 Nov 2015 18:09:47 +0000 (10:09 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 10 Nov 2015 22:44:26 +0000 (14:44 -0800)
commitb0aeba741b2d082e4f0773881af4906ce2bb8231
tree54aa8f78967e60d869d4502ab4554aae4676d6b9
parent3934bbc0446e4cae977a6efe82ce993d37434e53
Fix alloc_node_mem_map() to work on ia64 again

In commit a1c34a3bf00a ("mm: Don't offset memmap for flatmem") Laura
fixed a problem for Srinivas relating to the bottom 2MB of RAM on an ARM
IFC6410 board.

One small wrinkle on ia64 is that it allocates the node_mem_map earlier
in arch code, so it skips the block of code where "offset" is
initialized.

Move initialization of start and offset before the check for the
node_mem_map so that they will always be available in the latter part of
the function.

Tested-by: Laura Abbott <laura@labbott.name>
Fixes: a1c34a3bf00a (mm: Don't offset memmap for flatmem)
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/page_alloc.c