Commit Graph

19 Commits

Author SHA1 Message Date
Paul Mundt 339547bf5d sh: Move entry point code to .text.head.
Follow Al Viro's m68k change from l-k:

	i.e. tell modpost that entry point code (that has to be outside
	of .init.text for external reasons) is OK to refer to .init.*

Shuts up some section mismatch warnings from modpost.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 17:40:03 +09:00
Fenghua Yu 5fb7dc37dc define new percpu interface for shared data
per cpu data section contains two types of data.  One set which is
exclusively accessed by the local cpu and the other set which is per cpu,
but also shared by remote cpus.  In the current kernel, these two sets are
not clearely separated out.  This can potentially cause the same data
cacheline shared between the two sets of data, which will result in
unnecessary bouncing of the cacheline between cpus.

One way to fix the problem is to cacheline align the remotely accessed per
cpu data, both at the beginning and at the end.  Because of the padding at
both ends, this will likely cause some memory wastage and also the
interface to achieve this is not clean.

This patch:

Moves the remotely accessed per cpu data (which is currently marked
as ____cacheline_aligned_in_smp) into a different section, where all the data
elements are cacheline aligned. And as such, this differentiates the local
only data and remotely accessed data cleanly.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: <linux-arch@vger.kernel.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19 10:04:44 -07:00
Paul Mundt e181127a7a sh: Add a .bss.page_aligned section for 4K stacks.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-12 10:40:36 +09:00
Takashi YOSHII 3a3c60fc0b sh: Align .machvec.init section on a 4-byte boundary.
.machvec.init can be misaligned with the recent machvec changes,
forcibly align it on the boundary that it expects, as before.

Signed-off-by: Takashi YOSHII <takashi.yoshii.ze@hitachi.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-06-08 02:43:41 +00:00
Paul Mundt 9655ad03af sh: Fixup machvec support.
This fixes up much of the machvec handling, allowing for it to be
overloaded on boot. Making practical use of this still requires
some Kconfig munging, however.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-06-08 02:43:37 +00:00
Sam Ravnborg ca967258b6 all-archs: consolidate .data section definition in asm-generic
With this consolidation we can now modify the .data
section definition in one spot for all archs.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2007-05-19 09:11:57 +02:00
Sam Ravnborg 7664709b44 all-archs: consolidate .text section definition in asm-generic
Move definition of .text section to asm-generic.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2007-05-19 09:11:57 +02:00
Paul Mundt fa69151173 sh: generic BUG() support.
Wire up GENERIC_BUG for SH. This moves off of the special bug
frame and on to the generic struct bug_entry. Roughly the same
semantics are retained, and we can kill off some of the verbose
BUG() reporting code.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-05-07 02:10:53 +00:00
Jeremy Fitzhardinge b6e3590f81 [PATCH] x86: Allow percpu variables to be page-aligned
Let's allow page-alignment in general for per-cpu data (wanted by Xen, and
Ingo suggested KVM as well).

Because larger alignments can use more room, we increase the max per-cpu
memory to 64k rather than 32k: it's getting a little tight.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2007-05-02 19:27:12 +02:00
Paul Mundt 87e29cacb7 sh: Use L1_CACHE_BYTES for .data.cacheline_aligned.
Previously this was using a hardcoded 32, use L1_CACHE_BYTES for
cacheline alignment instead.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-03-05 14:13:26 +09:00
Jean-Paul Saman 67d38229df [PATCH] disable init/initramfs.c: architectures
Update all arch/*/kernel/vmlinux.lds.S to not include space for initramfs
when CONFIG_BLK_DEV_INITRAMFS is not selected.  This saves another 4 kbytes
on most platfoms (some reserve PAGE_SIZE for initramfs).

Signed-off-by: Jean-Paul Saman <jean-paul.saman@nxp.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-11 10:51:25 -08:00
Paul Mundt f668f55c39 sh: Fixup .data.page_aligned.
This had a bogus .data.idt reference, fix it up..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-12-12 08:50:36 +09:00
Andrew Morton 61ce1efe6e [PATCH] vmlinux.lds: consolidate initcall sections
Add a vmlinux.lds.h helper macro for defining the eight-level initcall table,
teach all the architectures to use it.

This is a prerequisite for a patch which performs initcall synchronisation for
multithreaded-probing.

Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
[ Added AVR32 as well ]
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-27 15:34:51 -07:00
Paul Mundt a6a3113989 sh: Add support for 4K stacks.
This enables support for 4K stacks on SH.

Currently this depends on DEBUG_KERNEL, but likely all boards
will switch to this as the default in the future.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 18:22:14 +09:00
Paul Mundt d153ea88dc sh: stack debugging support.
This adds a DEBUG_STACK_USAGE and DEBUG_STACKOVERFLOW for SH.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 18:20:16 +09:00
Paul Mundt e7f93a355c sh: Make PAGE_OFFSET configurable.
nommu needs to be able to shift PAGE_OFFSET, so we switch it to a
non-user-visible CONFIG_PAGE_OFFSET and use that in the few places
where it matters.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 17:19:13 +09:00
Paul Mundt 50e98e72e4 sh: Kill off the .stack section.
We had a special .stack section in the ld script that
was being used to position r15 initially. This is
nonsensical, as we can just use a THREAD_SIZE offset
from the init_thread_union instead (as every other arch
does).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2006-09-27 11:40:05 +09:00
Jörn Engel 6ab3d5624e Remove obsolete #include <linux/config.h>
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-06-30 19:25:36 +02:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00