cross architecture discussion list ()

Akinobu Mita | 1 Jun 2011 16:32

Picon

[PATCH] asm-generic: add another generic ext2 atomic bitops

The majority of architectures implement ext2 atomic bitops as
test_and_{set,clear}_bit() without spinlock.

This adds this type of generic implementation in ext2-atomic.h and
use it wherever possible.

Suggested-by: Andreas Dilger <adilger <at> dilger.ca>
Signed-off-by: Akinobu Mita <akinobu.mita <at> gmail.com>
Cc: Arnd Bergmann <arnd <at> arndb.de>
Cc: linux-arch <at> vger.kernel.org
---
 arch/alpha/include/asm/bitops.h          |    4 ++--
 arch/arm/include/asm/bitops.h            |    6 ++----
 arch/cris/include/asm/bitops.h           |    4 ++--
 arch/frv/include/asm/bitops.h            |    4 ++--
 arch/ia64/include/asm/bitops.h           |    4 ++--
 arch/m68k/include/asm/bitops_mm.h        |    6 ++----
 arch/mn10300/include/asm/bitops.h        |    8 ++------
 arch/parisc/include/asm/bitops.h         |   10 ++--------
 arch/powerpc/include/asm/bitops.h        |    6 ++----
 arch/s390/include/asm/bitops.h           |    6 ++----
 arch/sparc/include/asm/bitops_64.h       |    6 ++----
 arch/tile/include/asm/bitops_64.h        |    6 ++----
 arch/x86/include/asm/bitops.h            |    6 ++----
 arch/xtensa/include/asm/bitops.h         |   15 ++-------------
 include/asm-generic/bitops/ext2-atomic.h |    9 +++++++++
 15 files changed, 37 insertions(+), 63 deletions(-)

diff --git a/arch/alpha/include/asm/bitops.h b/arch/alpha/include/asm/bitops.h
index 85b8152..e7f02c6 100644

(Continue reading)

ralf | 1 Jun 2011 20:05

[patch 04/14] i8253: Make MIPS use the shared i8253_lock.

Signed-off-by: Ralf Baechle <ralf <at> linux-mips.org>
To: linux-kernel <at> vger.kernel.org
Cc: linux-mips <at> linux-mips.org

 arch/mips/Kconfig        |    1 +
 arch/mips/kernel/i8253.c |    3 ---
 2 files changed, 1 insertion(+), 3 deletions(-)

Index: linux-mips/arch/mips/Kconfig
===================================================================
--- linux-mips.orig/arch/mips/Kconfig
+++ linux-mips/arch/mips/Kconfig
 <at>  <at>  -2388,6 +2388,7  <at>  <at>  config MMU
 config I8253
 	bool
 	select CLKSRC_I8253
+	select I8253_LOCK
 	select MIPS_EXTERNAL_TIMER

 config ZONE_DMA32
Index: linux-mips/arch/mips/kernel/i8253.c
===================================================================
--- linux-mips.orig/arch/mips/kernel/i8253.c
+++ linux-mips/arch/mips/kernel/i8253.c
 <at>  <at>  -16,9 +16,6  <at>  <at> 
 #include <asm/io.h>
 #include <asm/time.h>

-DEFINE_RAW_SPINLOCK(i8253_lock);
-EXPORT_SYMBOL(i8253_lock);

(Continue reading)

ralf | 1 Jun 2011 20:04

[patch 03/14] i8253: Consolidate all kernel definitions of i8253_lock in lib/i8253-lock.c.

Signed-off-by: Ralf Baechle <ralf <at> linux-mips.org>
To: linux-kernel <at> vger.kernel.org

 lib/Kconfig      |    6 ++++++
 lib/Makefile     |    1 +
 lib/i8253-lock.c |   11 +++++++++++
 3 files changed, 18 insertions(+)

Index: linux-i8253/lib/i8253-lock.c
===================================================================
--- /dev/null
+++ linux-i8253/lib/i8253-lock.c
 <at>  <at>  -0,0 +1,11  <at>  <at> 
+#include <linux/spinlock.h>
+#include <linux/module.h>
+
+/*
+ * Protects access to I/O ports
+ *
+ * 0040-0043 : timer0, i8253 / i8254
+ * 0061-0061 : NMI Control Register which contains two speaker control bits.
+ */
+DEFINE_RAW_SPINLOCK(i8253_lock);
+EXPORT_SYMBOL(i8253_lock);
Index: linux-i8253/lib/Makefile
===================================================================
--- linux-i8253.orig/lib/Makefile
+++ linux-i8253/lib/Makefile
 <at>  <at>  -37,6 +37,7  <at>  <at>  obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o 
 obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o

(Continue reading)

ralf | 1 Jun 2011 20:05

[patch 05/14] i8253: Make x86 use the shared i8253_lock.

Signed-off-by: Ralf Baechle <ralf <at> linux-mips.org>
To: linux-kernel <at> vger.kernel.org
Cc: Thomas Gleixner <tglx <at> linutronix.de>
Cc: Ingo Molnar <mingo <at> redhat.com>
Cc: "H. Peter Anvin" <hpa <at> zytor.com>
Cc: x86 <at> kernel.org

 arch/x86/Kconfig        |    1 +
 arch/x86/kernel/i8253.c |    3 ---
 2 files changed, 1 insertion(+), 3 deletions(-)

Index: linux-mips/arch/x86/Kconfig
===================================================================
--- linux-mips.orig/arch/x86/Kconfig
+++ linux-mips/arch/x86/Kconfig
 <at>  <at>  -67,6 +67,7  <at>  <at>  config X86
 	select GENERIC_IRQ_PROBE
 	select GENERIC_PENDING_IRQ if SMP
 	select GENERIC_IRQ_SHOW
+	select I8253_LOCK
 	select IRQ_FORCED_THREADING
 	select USE_GENERIC_SMP_HELPERS if SMP
 	select HAVE_BPF_JIT if (X86_64 && NET)
Index: linux-mips/arch/x86/kernel/i8253.c
===================================================================
--- linux-mips.orig/arch/x86/kernel/i8253.c
+++ linux-mips/arch/x86/kernel/i8253.c
 <at>  <at>  -16,9 +16,6  <at>  <at> 
 #include <asm/hpet.h>
 #include <asm/smp.h>

(Continue reading)

Chris Metcalf | 1 Jun 2011 22:15

Re: [PATCH 1/1] Add new syscall sys_sendmmsg to generic unistd

On 5/29/2011 5:57 PM, Arnd Bergmann wrote:
> On Sunday 29 May 2011 23:30:24 Jonas Bonn wrote:
>>> * remove all __ARCH_WANT_* from asm/unistd.h and use the generic glibc
>>>   implementation.
>>
>> I tried this earlier but ran into issues with uClibc, which is the only
>> libc port that we currently have.  Is uClibc known to be compatible with
>> the reduced set of syscalls?
>>
>> A good compromise here may be to submit the patch upstream with the
>> reduced set of syscalls but to maintain a separate tree locally that
>> reenables these for use with our current uClibc port until we can get it
>> straightened out.  It would be good to know, however, what's known to be
>> working for others in this area...
> 
> I don't think that there is a port today, but you can maybe Chris Metcalf,
> Guan Xuetao or Linas Vepstas know more about this, as they have all
> worked on the glibc support for the generic syscall interface.

The arch/tile glibc port works with none of the "extra" syscalls.  It has
not yet been pushed back to the community (although we just got our FSF
paperwork complete), but you can grab our version from
http://www.tilera.com/scm/ .  I tried to extract the asm-generic aspects
into a sysdeps/unix/sysv/linux/generic/ hierarchy as distinct from the
actual tile-specific code.

We hacked up uclibc to handle our architecture, too, but then discontinued
support for it, and the code was a pretty gnarly set of hacks on top of the
old nptl branch (long since merged into the uclibc trunk).

(Continue reading)

Greg Ungerer | 2 Jun 2011 06:30

Re: [PATCH] asm-generic: add another generic ext2 atomic bitops


Hi Akinobu,

On 02/06/11 00:32, Akinobu Mita wrote:
> The majority of architectures implement ext2 atomic bitops as
> test_and_{set,clear}_bit() without spinlock.
>
> This adds this type of generic implementation in ext2-atomic.h and
> use it wherever possible.

I am trying to get consensus on merging the m68k bitops_mm.h and
bitops_no.h. Here is a proposed patch to do this:

http://www.spinics.net/lists/linux-m68k/msg03803.html

I expect you wouldn't need to patch m68k/bitops_mm.h if this
goes in.

Regards
Greg

> Suggested-by: Andreas Dilger<adilger <at> dilger.ca>
> Signed-off-by: Akinobu Mita<akinobu.mita <at> gmail.com>
> Cc: Arnd Bergmann<arnd <at> arndb.de>
> Cc: linux-arch <at> vger.kernel.org
> ---
>   arch/alpha/include/asm/bitops.h          |    4 ++--
>   arch/arm/include/asm/bitops.h            |    6 ++----
>   arch/cris/include/asm/bitops.h           |    4 ++--
>   arch/frv/include/asm/bitops.h            |    4 ++--

(Continue reading)

Sergei Shtylyov | 2 Jun 2011 13:29

Re: [patch 12/14] i8253: Move remaining content and delete <asm/i8253.h>

Hello.

On 01-06-2011 22:05, ralf <at> linux-mips.org wrote:

> There is no really good other place but one line for two out of three
> architectures that have a <asm/i8253.h> file doesn't justify this files
> existence.

    I couldn't parse that. 

> Signed-off-by: Ralf Baechle <ralf <at> linux-mips.org>
> To: linux-kernel <at> vger.kernel.org
> Cc: linux-arm-kernel <at> lists.infradead.org
> Cc: Russell King <linux <at> arm.linux.org.uk>
> Cc: linux-mips <at> linux-mips.org
> Cc: Thomas Gleixner <tglx <at> linutronix.de>
> Cc: Ingo Molnar <mingo <at> redhat.com>
> Cc: "H. Peter Anvin" <hpa <at> zytor.com>
> Cc: x86 <at> kernel.org

WBR, Sergei

Arnd Bergmann | 2 Jun 2011 20:30

Picon

Re: [PATCH] asm-generic/unistd.h: support sendmmsg syscall

On Thursday 02 June 2011 20:21:45 Chris Metcalf wrote:
> 
> Signed-off-by: Chris Metcalf <cmetcalf <at> tilera.com>

Acked-by: Arnd Bergmann <arnd <at> arndb.de>

Arnd Bergmann | 3 Jun 2011 18:00

Picon

Re: [PATCH] asm-generic: add another generic ext2 atomic bitops

On Wednesday 01 June 2011, Akinobu Mita wrote:
> The majority of architectures implement ext2 atomic bitops as
> test_and_{set,clear}_bit() without spinlock.
> 
> This adds this type of generic implementation in ext2-atomic.h and
> use it wherever possible.

The idea sounds really good, but I'm trying to keep the number of
ARCH_* macros low. How about instead providing a new
asm-generic/bitops/ext2-atomic-setbit.h or similar?

Each architecture can then include either the spinlock or the
atomic bitop based version.

	Arnd

Gerhard Pircher | 3 Jun 2011 21:22

Picon

Re: [patch 00/14] Sort out i8253 and PC speaker locking and headers


-------- Original-Nachricht --------
> Datum: Fri, 3 Jun 2011 19:00:38 +0100
> Von: Ralf Baechle <ralf <at> linux-mips.org>
> An: Gerhard Pircher <gerhard_pircher <at> gmx.net>
> CC: linux-mips <at> linux-mips.org, linuxppc-dev <at> lists.ozlabs.org, linux-alpha <at> vger.kernel.org,
linux-arch <at> vger.kernel.org, linux-kernel <at> vger.kernel.org, Thomas Gleixner
<tglx <at> linutronix.de>, Benjamin Herrenschmidt <benh <at> kernel.crashing.org>
> Betreff: Re: [patch 00/14] Sort out i8253 and PC speaker locking and headers

> On Thu, Jun 02, 2011 at 09:11:19PM +0200, Gerhard Pircher wrote:
> 
> > > #if defined(CONFIG_MIPS) || defined(CONFIG_X86)
> > > /* Use the global PIT lock ! */
> > > #include <asm/i8253.h>
> > > #else
> > > #include <asm/8253pit.h>
> > > static DEFINE_RAW_SPINLOCK(i8253_lock);
> > > #endif
> > > 
> > > sound/drivers/pcsp/pcsp.h:
> > > 
> > > #if defined(CONFIG_MIPS) || defined(CONFIG_X86)
> > > /* Use the global PIT lock ! */
> > > #include <asm/i8253.h>
> > > #else
> > > #include <asm/8253pit.h>
> > > static DEFINE_RAW_SPINLOCK(i8253_lock);
> > > 
> > > $ git grep -F pcsp.h sound/drivers/pcsp

(Continue reading)

Group

gmane.linux.kernel.cross-arch.

Project Web Page

cross architecture discussion list ()

Search Archive

Page

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 13

Articles in period: 127

June 2011

Language

Change language

Options

Current view: Threads only / Showing only 20 lines / Not hiding cited text.
Change to All messages, whole messages, or hide cited text.

Post a message
NNTP Newsgroup
Classic Gmane web interface
XML

XML

RSS Feed
List Information

About Gmane

Recent entries

[PATCH] arch: configuration, deleting 'CONFIG_BUG' since always need i (23 May 2013)
[PATCH] Finally eradicate CONFIG_HOTPLUG (21 May 2013)
Get rid of cpuinit? (21 May 2013)
[PATCH v7, part3 00/16] accurately calculate memory statisitic informa (17 May 2013)
[PATCH v6, part3 00/16] accurately calculate memory statisitic informa (11 May 2013)
[PATCHv4] arm: Preserve the user r/w register TPIDRURW on context swit (8 May 2013)
[PATCH v5, part3 00/15] accurately calculate memory statisitic informa (8 May 2013)
[RFC PATCH v2 00/11] HugeTLB and THP support for ARM64. (8 May 2013)
dringender Vorschlag (8 May 2013)
[PATCHv3] arm: Preserve the user r/w register TPIDRURW on context swit (7 May 2013)
Build errors caused by modalias generation patch (6 May 2013)
[GIT PULL] Removal of GENERIC_GPIO (2 May 2013)
[RFC PATCH 0/9] HugeTLB and THP support for ARM64. (30 Apr 2013)
[PATCH v3 0/3] Wait/wound mutex implementation, v3 (28 Apr 2013)
bonjour (27 Apr 2013)
[PATCH v4 0/4] mutex: Improve mutex performance by doing less atomic- (17 Apr 2013)
[PATCH 1/1] metag: avoid unnecessary builtin dtb rebuilds (17 Apr 2013)
[PATCH v3 0/5] mutex: Improve mutex performance by doing less atomic-o (17 Apr 2013)
[PATCH v2 3/4] gpio: rename CONFIG_GPIOLIB to CONFIG_GPIO (16 Apr 2013)
[PATCH 0/3 v2] mutex: Improve mutex performance by doing less atomic-o (15 Apr 2013)
[RFC PATCH v1 00/19] kill free_all_bootmem() and clean up VALID_PAGE() (13 Apr 2013)

Archives

60	May 2013
167	April 2013
119	March 2013
140	February 2013
329	January 2013
140	December 2012
211	November 2012
252	October 2012
157	September 2012
128	August 2012
89	July 2012
100	June 2012
278	May 2012
239	April 2012
190	March 2012
280	February 2012
142	January 2012
113	December 2011
86	November 2011
138	October 2011
127	September 2011
167	August 2011
256	July 2011
124	June 2011
151	May 2011
81	April 2011
121	March 2011
139	February 2011
229	January 2011
187	December 2010
101	November 2010
230	October 2010
227	September 2010
114	August 2010
274	July 2010
148	June 2010
286	May 2010
273	April 2010
367	March 2010
143	February 2010
86	January 2010
176	December 2009
63	November 2009
26	October 2009
141	September 2009
149	August 2009
198	July 2009
351	June 2009
209	May 2009
195	April 2009
122	March 2009
164	February 2009
63	January 2009
299	December 2008
291	November 2008
147	October 2008
53	September 2008
80	August 2008
354	July 2008
375	June 2008
675	May 2008
439	April 2008
146	March 2008
1	January 2008

Design

Zawodny | Right Menu | Left Menu

Your Own Design

Paste the URL of your CSS below. Download CSS template