parisc: fixes and cleanups in page cache flushing (4/4)
authorJohn David Anglin <dave.anglin@bell.net>
Sun, 3 Feb 2013 23:02:49 +0000 (23:02 +0000)
committerHelge Deller <deller@gmx.de>
Wed, 20 Feb 2013 21:49:49 +0000 (22:49 +0100)
commitcca8e9026041544c0103b3037d8f03c1d2f4ae02
tree4b23cc0d2e54414d2ef91509fb66c895651797e4
parent6d2439d9558e259822fb487ec274cc9e362e6a81
parisc: fixes and cleanups in page cache flushing (4/4)

CONFIG_PARISC_TMPALIAS enables clear_user_highpage and copy_user_highpage.
These are essentially alternative implementations of clear_user_page and
copy_user_page.  They don't have anything to do with x86 high pages, but they
build on the infrastructure to save a few instructions.  Read the comment in
clear_user_highpage as it is very important to the implementation.  For this
reason, there isn't any gain in using the TMPALIAS/highpage approach.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
arch/parisc/kernel/cache.c