Ralf Baechle f8829caee3 [MIPS] Fix aliasing bug in copy_to_user_page / copy_from_user_page
The current implementation uses a sequence of a cacheflush and a copy.
This is racy in case of a multithreaded debuggee and renders GDB
virtually unusable.

Aside this fixes a performance hog rendering access to /proc/cmdline very
slow and resulting in a enough cache stalls for the 34K AP/SP programming
model to make the bare metal code on the non-Linux VPE miss RT deadlines.

The main part of this patch was originally written by Ralf Baechle;
Atushi Nemoto did the the debugging.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2006-10-21 23:17:35 +01:00
..
2006-10-19 17:55:13 +01:00
2005-11-07 18:05:37 +00:00
2006-10-19 17:55:14 +01:00
2006-10-09 23:20:46 +01:00
2006-10-11 19:30:58 +01:00
2006-10-19 17:55:13 +01:00
2006-10-01 23:16:57 +01:00