md: raid0: make hash_spacing and preshift sector-based.
authorAndre Noll <maan@systemlinux.org>
Thu, 8 Jan 2009 21:31:08 +0000 (08:31 +1100)
committerNeilBrown <neilb@suse.de>
Thu, 8 Jan 2009 21:31:08 +0000 (08:31 +1100)
commitccacc7d2cf03114a24ab903f710118e9e5d43273
treec856e2a17f6c6a26996a8cfba87680a2375061d5
parent83838ed87898e0a8ff8dbf001e54e6c017f0a011
md: raid0: make hash_spacing and preshift sector-based.

This patch renames the hash_spacing and preshift members of struct
raid0_private_data to spacing and sector_shift respectively and
changes the semantics as follows:

We always have spacing = 2 * hash_spacing. In case
sizeof(sector_t) > sizeof(u32) we also have sector_shift = preshift + 1
while sector_shift = preshift = 0 otherwise.

Note that the values of nb_zone and zone are unaffected by these changes
because in the sector_div() preceeding the assignement of these two
variables both arguments double.

Signed-off-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: NeilBrown <neilb@suse.de>
drivers/md/raid0.c
include/linux/raid/raid0.h