tree ed2f66ceccfa30867035e7ba7be46159e97e4e4d
parent 4b6d287f627b5fb6a49f78f9e81649ff98c62bb7
author NeilBrown <neilb@cse.unsw.edu.au> 1126308227 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1126309150 -0700

[PATCH] md: support md/linear array with components greater than 2 terabytes.

linear currently uses division by the size of the smallest componenet device
to find which device a request goes to.  If that smallest device is larger
than 2 terabytes, then the division will not work on some systems.

So we introduce a pre-shift, and take care not to make the hash table too
large, much like the code in raid0.

Also get rid of conf->nr_zones, which is not needed.

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>