linux-toradex.git/arch/xtensa/Kconfig, branch v2.6.27.17

remove mention of CONFIG_KMOD from documentation

2008-07-22T09:24:29+00:00

Also includes a few Kconfig files (xtensa, blackfin)

Signed-off-by: Johannes Berg 
Cc: Michael Kerrisk 
Cc: linux-doc@vger.kernel.org
Signed-off-by: Rusty Russell 
Acked-by: Randy Dunlap

ide: introduce HAVE_IDE

2008-02-09T09:46:40+00:00

To allow flexible configuration of IDE introduce HAVE_IDE.
All archs except arm, um and s390 unconditionally select it.
For arm the actual configuration determine if IDE is supported.

This is a step towards introducing drivers/Kconfig for arm.

Signed-off-by: Sam Ravnborg 
Acked-by: Russell King - ARM Linux 
Acked-by: Bartlomiej Zolnierkiewicz

avoid overflows in kernel/time.c

2008-02-08T17:22:39+00:00

When the conversion factor between jiffies and milli- or microseconds is
not a single multiply or divide, as for the case of HZ == 300, we currently
do a multiply followed by a divide.  The intervening result, however, is
subject to overflows, especially since the fraction is not simplified (for
HZ == 300, we multiply by 300 and divide by 1000).

This is exposed to the user when passing a large timeout to poll(), for
example.

This patch replaces the multiply-divide with a reciprocal multiplication on
32-bit platforms.  When the input is an unsigned long, there is no portable
way to do this on 64-bit platforms there is no portable way to do this
since it requires a 128-bit intermediate result (which gcc does support on
64-bit platforms but may generate libgcc calls, e.g.  on 64-bit s390), but
since the output is a 32-bit integer in the cases affected, just simplify
the multiply-divide (*3/10 instead of *300/1000).

The reciprocal multiply used can have off-by-one errors in the upper half
of the valid output range.  This could be avoided at the expense of having
to deal with a potential 65-bit intermediate result.  Since the intent is
to avoid overflow problems and most of the other time conversions are only
semiexact, the off-by-one errors were considered an acceptable tradeoff.

At Ralf Baechle's suggestion, this version uses a Perl script to compute
the necessary constants.  We already have dependencies on Perl for kernel
compiles.  This does, however, require the Perl module Math::BigInt, which
is included in the standard Perl distribution starting with version 5.8.0.
In order to support older versions of Perl, include a table of canned
constants in the script itself, and structure the script so that
Math::BigInt isn't required if pulling values from said table.

Running the script requires that the HZ value is available from the
Makefile.  Thus, this patch also adds the Kconfig variable CONFIG_HZ to the
architectures which didn't already have it (alpha, cris, frv, h8300, m32r,
m68k, m68knommu, sparc, v850, and xtensa.) It does *not* touch the sh or
sh64 architectures, since Paul Mundt has dealt with those separately in the
sh tree.

Signed-off-by: H. Peter Anvin 
Cc: Ralf Baechle ,
Cc: Sam Ravnborg ,
Cc: Paul Mundt ,
Cc: Richard Henderson ,
Cc: Michael Starvik ,
Cc: David Howells ,
Cc: Yoshinori Sato ,
Cc: Hirokazu Takata ,
Cc: Geert Uytterhoeven ,
Cc: Roman Zippel ,
Cc: William L. Irwin ,
Cc: Chris Zankel ,
Cc: H. Peter Anvin ,
Cc: Jan Engelhardt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Move Kconfig.instrumentation to arch/Kconfig and init/Kconfig

2008-02-03T07:58:08+00:00

Move the instrumentation Kconfig to

arch/Kconfig for architecture dependent options
  - oprofile
  - kprobes

and

init/Kconfig for architecture independent options
  - profiling
  - markers

Remove the "Instrumentation Support" menu. Everything moves to "General setup".
Delete the kernel/Kconfig.instrumentation file.

Signed-off-by: Mathieu Desnoyers 
Cc: Linus Torvalds 
Cc: 
Signed-off-by: Sam Ravnborg

PCI: Kconfig help: don't refer to the PCI-HOWTO

2008-02-01T23:04:26+00:00

A HOWTO that hasn't been updated for half a dozen years no longer
"contains valuable information about which PCI hardware does work under
Linux and which doesn't".

Signed-off-by: Adrian Bunk 
Signed-off-by: Greg Kroah-Hartman

Kbuild/doc: fix links to Documentation files

2007-10-30T21:26:30+00:00

Fix links to files in Documentation/* in various Kconfig files

Signed-off-by: Dirk Hohndel 
Signed-off-by: Linus Torvalds

Combine instrumentation menus in kernel/Kconfig.instrumentation

2007-10-19T18:53:54+00:00

Quoting Randy:

"It seems sad that this patch sources Kconfig.marker, a 7-line file,
20-something times.  Yes, you (we) don't want to put those 7 lines into
20-something different files, so sourcing is the right thing.

However, what you did for avr32 seems more on the right track to me: make
_one_ Instrumentation support menu that includes PROFILING, OPROFILE, KPROBES,
and MARKERS and then use (source) that in all of the arches."

Signed-off-by: Mathieu Desnoyers 
Acked-by: Randy Dunlap 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] sort the devres mess out

2007-02-11T19:18:07+00:00

* Split the implementation-agnostic stuff in separate files.
* Make sure that targets using non-default request_irq() pull
  kernel/irq/devres.o
* Introduce new symbols (HAS_IOPORT and HAS_IOMEM) defaulting to positive;
  allow architectures to turn them off (we needed these symbols anyway for
  dependencies of quite a few drivers).
* protect the ioport-related parts of lib/devres.o with CONFIG_HAS_IOPORT.

Signed-off-by: Al Viro 
Signed-off-by: Linus Torvalds

[PATCH] optional ZONE_DMA: introduce CONFIG_ZONE_DMA

2007-02-11T18:51:18+00:00

This patch simply defines CONFIG_ZONE_DMA for all arches.  We later do special
things with CONFIG_ZONE_DMA after the VM and an arch are prepared to work
without ZONE_DMA.

CONFIG_ZONE_DMA can be defined in two ways depending on how an architecture
handles ISA DMA.

First if CONFIG_GENERIC_ISA_DMA is set by the arch then we know that the arch
needs ZONE_DMA because ISA DMA devices are supported.  We can catch this in
mm/Kconfig and do not need to modify arch code.

Second, arches may use ZONE_DMA in an unknown way.  We set CONFIG_ZONE_DMA for
all arches that do not set CONFIG_GENERIC_ISA_DMA in order to insure backwards
compatibility.  The arches may later undefine ZONE_DMA if their arch code has
been verified to not depend on ZONE_DMA.

Signed-off-by: Christoph Lameter 
Cc: Andi Kleen 
Cc: "Luck, Tony" 
Cc: Kyle McMartin 
Cc: Matthew Wilcox 
Cc: James Bottomley 
Cc: Paul Mundt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] xtensa: remove extra header files

2006-12-10T17:55:39+00:00

The Xtensa port contained many header files that were never needed.  This
rather lengthy patch removes all those files.  Unfortunately, there were
many dependencies that needed to be updated, so this patch touches quite a
few source files.

Signed-off-by: Chris Zankel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds