litmus-rt.git/arch/sh/lib/copy_page.S, branch 2010.2 The LITMUS^RT kernel. sh: Kill off dcache writeback from copy_page(). 2009-09-08T07:23:08+00:00 Paul Mundt lethal@linux-sh.org 2009-09-08T07:23:08+00:00 a2494b9b5fb702becaf8d8e3138f7a1a0d3c537e 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> 
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>
sh: __copy_user function can corrupt the stack in case of exception 2008-11-13T08:40:30+00:00 Stuart MENEFY stuart.menefy@st.com 2008-10-10T18:49:30+00:00 5d52013cbb3d39bde9f5a6023193058eeb112e98 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> 
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>
sh: Allow optimized clear/copy page routines to be used on SH-2. 2008-04-18T16:50:02+00:00 Paul Mundt lethal@linux-sh.org 2008-03-21T09:07:04+00:00 5c0cbd74bb56aeb7f3de883ab79c5f501622ccb1 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> 
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>
sh: Explicit alignment for PAGE_SIZE in copy/clear_page(). 2008-01-28T04:18:58+00:00 Paul Mundt lethal@linux-sh.org 2007-11-30T07:34:26+00:00 325df7f20467da07901c4f2b006d3457bba0adec Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
sh: clear/copy_page renames in lib and lib64. 2008-01-28T04:18:54+00:00 Paul Mundt lethal@linux-sh.org 2007-11-21T13:46:14+00:00 9895f9429cb489ba271c06767531083ae4c4bcbe Signed-off-by: Paul Mundt <lethal@linux-sh.org> 
Signed-off-by: Paul Mundt <lethal@linux-sh.org>