Commit Graph

535 Commits

Author SHA1 Message Date
Paul Mundt
e06c4e5775 sh: Fix fs.h removal from mm.h regressions.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-31 13:01:43 +09:00
David McCullough
c64ac9f058 sh: fix get_wchan() for SH kernels without framepointers
Do not follow the frame pointers (/proc/X/task/1/stat) unless we were
compiled with them.

Signed-off-by: David McCullough <david_mccullough@au.securecomputing.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-26 17:46:07 +09:00
David McCullough
1f25756a11 sh: arch/sh/boot - fix shell usage
Fix the shell call to explicitly use bash, since they are bash
specific and not all systems have bash as the default.

Signed-off-by: David McCullough <david_mccullough@au.securecomputing.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-26 17:43:41 +09:00
Magnus Damm
d89ddd1c84 sh: remove support for sh7300 and solution engine 7300
This patch removes old dead code:
- kill off sh7300 cpu support
- get rid of broken solution engine 7300 board support

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-26 15:37:57 +09:00
Paul Mundt
e257ad062a sh: Kill off virt_to_bus()/bus_to_virt().
Wire up ARCH_NO_VIRT_TO_BUS, and kill off the remaining users. The
dma-mapping code really wanted virt_to_phys()/phys_to_virt() anyways,
there are no inherently special bus addresses.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-26 15:37:40 +09:00
Paul Mundt
ac79fd58a2 sh: Restrict DSP support to specific CPUs.
Not all CPUs support the DSP, and this leads to problems when mixing
and matching CPU types and DSP opcodes. Fix this up by only allowing
CONFIG_SH_DSP to be enabled for the CPUs that explicitly have such a
block.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-26 15:35:24 +09:00
Paul Mundt
b067c50a7f sh: Silence sq compile warning on sh4 nommu.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-26 15:35:17 +09:00
Paul Mundt
3c6b6c7fb7 sh: Kill the rest of the SE73180 cruft.
There was a stray header, and the mach-type removal was also
missed.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-26 15:34:56 +09:00
Magnus Damm
870e8a2438 sh: remove support for sh73180 and solution engine 73180
This patch removes old dead code:
- kill off sh73180 cpu support
- get rid of broken solution engine 73180 board support

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-25 10:49:21 +09:00
Magnus Damm
347b9bdddb sh: remove old broken pint code
The code in arch/sh/kernel/cpu/irq/pint.c doesn't compile, so let's
get rid of it to make space for a future pint implementation on top
of intc.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-25 10:46:32 +09:00
Paul Mundt
f0b859e3d6 sh: Reclaim beginning of P3 space for vmalloc area.
The first 1MB of P3 space was reserved and used for page colouring,
as we've reworked that to use fixmaps, we can reclaim the space and
hand it back to VMALLOC_START.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-25 10:43:47 +09:00
Adrian McMenamin
eb695dbf00 sh: Fix Dreamcast DMA issues.
The current SH DMA API is somewhat broken, not correctly matching
virtual channel to the correct SH DMAC. This wasn't noticeable when
using g2 DMA for the sound driver - one channel 0 is as good as any
other! - but caused the pvr2 driver to fail.

This patch fixes the pvr2 problem and consequently fixes the sound
driver to ensure it continues to function.

Signed-off by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-24 13:30:55 +09:00
Paul Mundt
8cf1a74305 sh: Add kmap_coherent()/kunmap_coherent() interface for SH-4.
This wires up kmap_coherent() and kunmap_coherent() on SH-4, and
moves away from the p3map_mutex and reserved P3 space, opting to
use fixmaps for colouring instead.

The copy_user_page()/clear_user_page() implementations are moved
to this, which fixes the nasty blowups with spinlock debugging
as a result of having some of these calls nested under the page
table lock.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-24 13:28:26 +09:00
Thomas Gleixner
18de5bc4c1 clockevents: fix resume logic
We need to make sure, that the clockevent devices are resumed, before
the tick is resumed. The current resume logic does not guarantee this.

Add CLOCK_EVT_MODE_RESUME and call the set mode functions of the clock
event devices before resuming the tick / oneshot functionality.

Fixup the existing users.

Thanks to Nigel Cunningham for tracking down a long standing thinko,
which affected the jinxed VAIO.

[akpm@linux-foundation.org: xen build fix]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-21 17:49:15 -07:00
Magnus Damm
56386f6424 sh: intc - add support for SH7750 and its variants
This patch converts the cpu specific 7750 setup code to use the
new intc controller. Many new vectors are added and multiple
processor variants including 7091, 7750, 7750s, 7750r, 7751 and
7751r should all have the correct vectors hooked up.

IRLM interrupts can be enabled using ipr_irq_enable_irlm() which
now is marked as __init.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 18:44:49 +09:00
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
Paul Mundt
bf73af2314 sh: heartbeat: Shut up resource size warning.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 17:35:42 +09:00
Magnus Damm
ee54505199 sh: update r2d defconfig and fix SH7751R pci compliation
This patch updates the r2d board support in a few ways:

- CPU_SUBTYPE_SH7751R is selected in the defconfig to play well
  with the r2d board Kconfig entry. Without this the defconfig
  results in no board enabled.

- Enable EARLY_PRINTK.
- Enable SH_STANDARD_BIOS
	- this works well for early printk on the r2d board.

- Add "earlyprink=bios" to the cmdline for early serial port
  output by default.

- CONFIG_SUBTYPE_SH7751R support is added to the sh-specific
  pci makefile.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 17:25:48 +09:00
Paul Mundt
98d877c487 sh: Many symbol exports for nommu allmodconfig.
allmodconfig generates a lot of interesting code, a lot of the
generated symbols we've never exported before, so this fixes
those up. Verified with both GCC3 and GCC4 toolchains.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 16:59:49 +09:00
Magnus Damm
3a353824df sh: zero terminate 8250 platform data for r2d board
struct plat_serial8250_port should contain a terminating zero entry

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 16:34:22 +09:00
Paul Mundt
6894e0a943 sh: cpufreq: Fix up the build for SH-2.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 16:03:02 +09:00
Paul Mundt
fc10020292 sh: Make on-chip DMA channel selection explicit.
Currently this has a prompt to allow users to change it. There's
no reason to do this, and it has caused breakage and confusion
in the past, so remove it entirely.

We'll get rid of this when the whole driver is tidied for
the driver model.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 14:24:57 +09:00
Paul Mundt
3e7678333a sh: Fix up CPU dependencies for on-chip DMAC.
We only handle SH-3 and SH-4 at present, don't expose it to the
other CPUs.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 14:23:04 +09:00
Paul Mundt
da9f0ac2f1 Merge branch 'clkfwk' 2007-07-20 13:38:49 +09:00
Paul Mundt
cb5ec75b8b sh: cpufreq: clock framework support.
This gets the SH cpufreq working again. We follow the changes
in the AVR32 implementation for wrapping in to the clock framework.
CPUs that wish to use this are required to define rate rounding
primitives in order to satisfy clk_round_rate().

This works well enough for the common case, though we should
look at unifying this driver across all of the platforms that
implement clock framework support in one capacity or another.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 13:38:19 +09:00
Paul Mundt
fe04d7798f sh: Support rate rounding for SH7722 FRQCR clocks.
Now that the round_rate() op is supported, hook it up on SH7722
for the FRQCR (CPU, PCLK, etc.) clocks.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 13:30:07 +09:00
Paul Mundt
f6991b0456 sh: Implement clk_round_rate() in the clock framework.
This is an optional component of the clock framework. However,
as we're going to be using this in the cpufreq drivers, add
support for it to the framework.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 13:29:09 +09:00
Paul Mundt
bd5f0d1c25 sh: Fix up PCI section mismatch warnings.
Flag pcibios_setup() and pcibios_fixup_bus() as __devinit.
Follows the sh64 change.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 13:22:47 +09:00
Paul Mundt
0c99adb0a6 sh: Wire up fallocate() syscall.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 12:27:09 +09:00
Magnus Damm
39c7aa9ea9 sh: intc - add support for 7780
This patch converts the cpu specific 7780 setup code to use the
new intc controller. Many new vectors are added and also support for
external interrupt sense configuration. So with this patch it is now
possible to configure external interrupt pins as edge or level
triggered using set_irq_type().

No external interrupts are registered by default.
Use plat_irq_setup_pins() to select between IRQ or IRL mode.

This patch also fixes the Alarm IRQ for the RTC.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 12:18:21 +09:00
Magnus Damm
680c45981a sh: intc - improve group support
This patch improves intc group support, ie it makes it possible to
group interrupts together and mask / unmask the entire group. This
also works with priorities, so setting a priority for an entire group
is also possible. This patch is needed to properly support certain
processors such as the 7780.

Fixes for NULL pointers in DECLARE_INTC_DESC() are also included.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 12:18:21 +09:00
Paul Mundt
e5e3dfc80a sh: push-switch: Correct license string.
This was accidentally set as "GPLv2", whereas the kernel expects v2
to be written "GPL v2", this caused complaints regarding the use
of the platform device APIs when built as a module.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 12:18:20 +09:00
Paul Mundt
792e947a29 sh: cpufreq: Fix driver dependencies and flag as broken.
This is only supported on SH-4, so don't expose it for the other
CPUs. Additionally, it's suffered some bitrot, so add a BROKEN
dependency as well until we fix it up.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 12:18:20 +09:00
Magnus Damm
90015c8938 sh: IPR/INTC2 IRQ setup consolidation.
This patch unifies the cpu specific interrupt setup functions for
interrupt controller blocks such as ipr, intc2 and intc. There is no
point in having separate functions for each interrupt controller, so
let's clean this up.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 12:18:20 +09:00
Magnus Damm
493a358e0a sh: clean up interrupt code for solution engine 7722 board
This patch cleans up solution engine 7722 specific interrupt code.
The main purpose is to replace the mux function with use of
set_irq_chained_handler() and replace hard coded register poking
code with set_irq_type(). The board specific interrupts are also
moved to start from SE7722_FPGA_IRQ_BASE.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 12:18:20 +09:00
Magnus Damm
1b06428ee5 sh: intc - add support for 7722 processor
This patch converts the cpu specific 7722 setup code to use the
new intc controller. Many new vectors are added and also support
for external interrupt sense configuration. So with this patch
it is now possible to configure external interrupt pins as edge
or level triggered using set_irq_type().

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 12:18:20 +09:00
Magnus Damm
02ab3f7079 sh: intc - shared IPR and INTC2 controller
This is the second version of the shared interrupt controller patch
for the sh architecture, fixing up handling of intc_reg_fns[].

The three main advantages with this controller over the existing
ones are:

	- Both priority (ipr) and bitmap (intc2) registers are
	  supported
	- External pin sense configuration is supported, ie edge
	  vs level triggered
	- CPU/Board specific code maps 1:1 with datasheet for
	  easy verification

This controller can easily coexist with the current IPR and INTC2
controllers, but the idea is that CPUs/Boards should be moved over
to this controller over time so we have a single code base to
maintain.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 12:18:20 +09:00
Magnus Damm
53aba19f82 sh: Fix irq assignment for uarts on sh7722
This patch contains two serial port related fixes for sh7722:
- Make sure the irqs for the first serial port is correct
- Add the second and third serial port to the platform data

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 12:18:20 +09:00
Kristoffer Ericson
4aafae27d0 sh: hd64461 tidying.
Kill off the hd64461 io.c, as all of the hd64461 users are now
using the generic I/O routines.

[ hd64461/ moved to hd64461.c by Paul ]

Signed-off-by: Kristoffer Ericson <kristoffer.ericson@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 12:18:19 +09:00
Yoshihiro Shimoda
e6c972f218 sh: r7780rp: Add R8A66597 and M66592 support.
This wires up the platform devices for the USB expansion boards for
the Highlander boards.

Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 12:18:19 +09:00
Paul Mundt
20c2df83d2 mm: Remove slab destructors from kmem_cache_create().
Slab destructors were no longer supported after Christoph's
c59def9f22 change. They've been
BUGs for both slab and slub, and slob never supported them
either.

This rips out support for the dtor pointer from kmem_cache_create()
completely and fixes up every single callsite in the kernel (there were
about 224, not including the slab allocator definitions themselves,
or the documentation references).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 10:11:58 +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
Nick Piggin
83c54070ee mm: fault feedback
This patch completes Linus's wish that the fault return codes be made into
bit flags, which I agree makes everything nicer.  This requires requires
all handle_mm_fault callers to be modified (possibly the modifications
should go further and do things like fault accounting in handle_mm_fault --
however that would be for another patch).

[akpm@linux-foundation.org: fix alpha build]
[akpm@linux-foundation.org: fix s390 build]
[akpm@linux-foundation.org: fix sparc build]
[akpm@linux-foundation.org: fix sparc64 build]
[akpm@linux-foundation.org: fix ia64 build]
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Ian Molton <spyro@f2s.com>
Cc: Bryan Wu <bryan.wu@analog.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Matthew Wilcox <willy@debian.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
Cc: Richard Curnow <rc@rc0.org.uk>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp>
Cc: Chris Zankel <chris@zankel.net>
Acked-by: Kyle McMartin <kyle@mcmartin.ca>
Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[ Still apparently needs some ARM and PPC loving - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-19 10:04:41 -07:00
Alexey Dobriyan
f284ce7269 PTRACE_POKEDATA consolidation
Identical implementations of PTRACE_POKEDATA go into generic_ptrace_pokedata()
function.

AFAICS, fix bug on xtensa where successful PTRACE_POKEDATA will nevertheless
return EPERM.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:03 -07:00
Alexey Dobriyan
7664732315 PTRACE_PEEKDATA consolidation
Identical implementations of PTRACE_PEEKDATA go into generic_ptrace_peekdata()
function.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:03 -07:00
Pavel Emelianov
bcdcd8e725 Report that kernel is tainted if there was an OOPS
If the kernel OOPSed or BUGed then it probably should be considered as
tainted.  Thus, all subsequent OOPSes and SysRq dumps will report the
tainted kernel.  This saves a lot of time explaining oddities in the
calltraces.

Signed-off-by: Pavel Emelianov <xemul@openvz.org>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
[ Added parisc patch from Matthew Wilson  -Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:02 -07:00
Linus Torvalds
b91cba52e9 Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6: (68 commits)
  sh: sh-rtc support for SH7709.
  sh: Revert __xdiv64_32 size change.
  sh: Update r7785rp defconfig.
  sh: Export div symbols for GCC 4.2 and ST GCC.
  sh: fix race in parallel out-of-tree build
  sh: Kill off dead mach.c for hp6xx.
  sh: hd64461.h cleanup and added comments.
  sh: Update the alignment when 4K stacks are used.
  sh: Add a .bss.page_aligned section for 4K stacks.
  sh: Don't let SH-4A clobber SH-4 CFLAGS.
  sh: Add parport stub for SuperIO ports.
  sh: Drop -Wa,-dsp for DSP tuning.
  sh: Update dreamcast defconfig.
  fb: pvr2fb: A few more __devinit annotations for PCI.
  fb: pvr2fb: Fix up section mismatch warnings.
  sh: Select IPR-IRQ for SH7091.
  sh: Correct __xdiv64_32/div64_32 return value size.
  sh: Fix timer-tmu build for SH-3.
  sh: Add cpu and mach links to CLEAN_FILES.
  sh: Preliminary support for the SH-X3 CPU.
  ...
2007-07-16 10:32:02 -07:00
Heiko Carstens
608e261968 generic bug: use show_regs() instead of dump_stack()
The current generic bug implementation has a call to dump_stack() in case a
WARN_ON(whatever) gets hit.  Since report_bug(), which calls dump_stack(),
gets called from an exception handler we can do better: just pass the
pt_regs structure to report_bug() and pass it to show_regs() in case of a
warning.  This will give more debug informations like register contents,
etc...  In addition this avoids some pointless lines that dump_stack()
emits, since it includes a stack backtrace of the exception handler which
is of no interest in case of a warning.  E.g.  on s390 the following lines
are currently always present in a stack backtrace if dump_stack() gets
called from report_bug():

 [<000000000001517a>] show_trace+0x92/0xe8)
 [<0000000000015270>] show_stack+0xa0/0xd0
 [<00000000000152ce>] dump_stack+0x2e/0x3c
 [<0000000000195450>] report_bug+0x98/0xf8
 [<0000000000016cc8>] illegal_op+0x1fc/0x21c
 [<00000000000227d6>] sysc_return+0x0/0x10

Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>
Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Kyle McMartin <kyle@parisc-linux.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 09:05:51 -07:00
Kristoffer Ericson
e509ac4bbc sh: sh-rtc support for SH7709.
Signed-off-by: Kristoffer Ericson <kristoffer.ericson@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-16 09:51:39 +09:00
Paul Mundt
075fc19bde sh: Revert __xdiv64_32 size change.
It's only __div64_32 that needs the fix, __xdiv64_32 behaves as
expected with the original size.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-13 12:27:13 +09:00