summaryrefslogtreecommitdiff
path: root/arch/sh/lib/copy_page.S
AgeCommit message (Collapse)Author
2009-09-08sh: Kill off dcache writeback from copy_page().Paul Mundt
Now that the cache purging is handled manually by all copy_page() callers, we can kill off copy_page()'s on writeback. This optimizes the non-aliasing case. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-11-13sh: __copy_user function can corrupt the stack in case of exceptionStuart MENEFY
The __copy_user function can corrupt the stack in the case of a non-trivial length of data, and either of the first two move instructions cause an exception. This is because the fixup for these two instructions is mapped to the no_pop case, but these instructions execute after the stack is pushed. This change creates an explicit NO_POP exception mapping macro, and uses it for the two instructions executed in the trivial case where no stack pushes occur. More information at ST Linux bugzilla: https://bugzilla.stlinux.com/show_bug.cgi?id=4824 Signed-off-by: Dylan Reid <dylan_reid@bose.com> Signed-off-by: Stuart Menefy <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-04-18sh: Allow optimized clear/copy page routines to be used on SH-2.Paul Mundt
Presently these are restricted to SH-3 and SH-4, so we reorder the ifdefs a bit to let other parts use these also. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: Explicit alignment for PAGE_SIZE in copy/clear_page().Paul Mundt
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2008-01-28sh: clear/copy_page renames in lib and lib64.Paul Mundt
Signed-off-by: Paul Mundt <lethal@linux-sh.org>