tree 354d229299b6b02d98f40e5c650e6ddbc3411b7b
parent d7c9661115fd23b4dabb710b3080dd9919dfa891
author Chris Metcalf <cmetcalf@tilera.com> 1376598542 -0400
committer Chris Metcalf <cmetcalf@tilera.com> 1378234412 -0400

tile: make __write_once a synonym for __read_mostly

This was really only useful for TILE64 when we mapped the
kernel data with small pages. Now we use a huge page and we
really don't want to map different parts of the kernel
data in different ways.

We retain the __write_once name in case we want to bring
it back to life at some point in the future.

Note that this change uncovered a latent bug where the
"smp_topology" variable happened to always be aligned mod 8
so we could store two "int" values at once, but when we
eliminated __write_once it ended up only aligned mod 4.
Fix with an explicit annotation.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>