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Commit 39ce941e authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6 

* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
  [S390] dcss: Initialize workqueue before using it.
  [S390] Remove BUILD_BUG_ON() in vmem code.
  [S390] sclp_tty/sclp_vt220: Fix scheduling while atomic
  [S390] dasd: fix panic caused by alias device offline
  [S390] dasd: add ifcc handling
  [S390] latencytop s390 support.
  [S390] Implement ext2_find_next_bit.
  [S390] Cleanup & optimize bitops.
  [S390] Define GENERIC_LOCKBREAK.
  [S390] console: allow vt220 console to be the only console
  [S390] Fix couple of section mismatches.
  [S390] Fix smp_call_function_mask semantics.
  [S390] Fix linker script.
  [S390] DEBUG_PAGEALLOC support for s390.
  [S390] cio: Add shutdown callback for ccwgroup.
  [S390] cio: Update documentation.
  [S390] cio: Clean up chsc response code handling.
  [S390] cio: make sense id procedure work with partial hardware response
parents 3d412f60 c5411dba

Documentation/DocBook/s390-drivers.tmpl

+16 −5
Original line number Diff line number Diff line
@@ -59,7 +59,7 @@ 
   <title>Introduction</title>

  <para>

    This document describes the interfaces available for device drivers that

    drive s390 based channel attached devices. This includes interfaces for

    drive s390 based channel attached I/O devices. This includes interfaces for

    interaction with the hardware and interfaces for interacting with the

    common driver core. Those interfaces are provided by the s390 common I/O

    layer.
@@ -86,9 +86,10 @@ 
	The ccw bus typically contains the majority of devices available to

	a s390 system. Named after the channel command word (ccw), the basic

	command structure used to address its devices, the ccw bus contains

	so-called channel attached devices. They are addressed via subchannels,

	visible on the css bus. A device driver, however, will never interact

	with the subchannel directly, but only via the device on the ccw bus,

	so-called channel attached devices. They are addressed via I/O

	subchannels, visible on the css bus. A device driver for

	channel-attached devices, however, will never interact	with the

	subchannel directly, but only via the I/O device on the ccw bus,

	the ccw device.

  </para>

    <sect1 id="channelIO">
@@ -116,7 +117,6 @@ 
!Iinclude/asm-s390/ccwdev.h

!Edrivers/s390/cio/device.c

!Edrivers/s390/cio/device_ops.c

!Edrivers/s390/cio/airq.c

    </sect1>

    <sect1 id="cmf">

     <title>The channel-measurement facility</title>
@@ -147,4 +147,15 @@ 
   </sect1>

  </chapter>



  <chapter id="genericinterfaces">

   <title>Generic interfaces</title>

  <para>

	Some interfaces are available to other drivers that do not necessarily

	have anything to do with the busses described above, but still are

	indirectly using basic infrastructure in the common I/O layer.

	One example is the support for adapter interrupts.

  </para>

!Edrivers/s390/cio/airq.c

  </chapter>



</book>

arch/s390/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -16,6 +16,9 @@ config LOCKDEP_SUPPORT 
config STACKTRACE_SUPPORT

	def_bool y



config HAVE_LATENCYTOP_SUPPORT

	def_bool y



config RWSEM_GENERIC_SPINLOCK

	bool
@@ -47,6 +50,11 @@ config NO_IOMEM 
config NO_DMA

	def_bool y



config GENERIC_LOCKBREAK

	bool

	default y

	depends on SMP && PREEMPT



mainmenu "Linux Kernel Configuration"



config S390

arch/s390/Kconfig.debug

+8 −0
Original line number Diff line number Diff line
@@ -6,4 +6,12 @@ config TRACE_IRQFLAGS_SUPPORT 


source "lib/Kconfig.debug"



config DEBUG_PAGEALLOC

	bool "Debug page memory allocations"

	depends on DEBUG_KERNEL

	help

	  Unmap pages from the kernel linear mapping after free_pages().

	  This results in a slowdown, but helps to find certain types of

	  memory corruptions.



endmenu

arch/s390/kernel/entry.S

+2 −5
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 


#include <linux/sys.h>

#include <linux/linkage.h>

#include <linux/init.h>

#include <asm/cache.h>

#include <asm/lowcore.h>

#include <asm/errno.h>
@@ -830,9 +831,7 @@ mcck_return: 
 * Restart interruption handler, kick starter for additional CPUs

 */

#ifdef CONFIG_SMP

#ifndef CONFIG_HOTPLUG_CPU

	.section .init.text,"ax"

#endif

	__CPUINIT

	.globl restart_int_handler

restart_int_handler:

	l	%r15,__LC_SAVE_AREA+60	# load ksp
@@ -845,9 +844,7 @@ restart_int_handler: 
	br	%r14			# branch to start_secondary

restart_addr:

	.long	start_secondary

#ifndef CONFIG_HOTPLUG_CPU

	.previous

#endif

#else

/*

 * If we do not run with SMP enabled, let the new CPU crash ...

arch/s390/kernel/entry64.S

+2 −5
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 


#include <linux/sys.h>

#include <linux/linkage.h>

#include <linux/init.h>

#include <asm/cache.h>

#include <asm/lowcore.h>

#include <asm/errno.h>
@@ -801,9 +802,7 @@ mcck_return: 
 * Restart interruption handler, kick starter for additional CPUs

 */

#ifdef CONFIG_SMP

#ifndef CONFIG_HOTPLUG_CPU

	.section .init.text,"ax"

#endif

	__CPUINIT

	.globl restart_int_handler

restart_int_handler:

	lg	%r15,__LC_SAVE_AREA+120 # load ksp
@@ -814,9 +813,7 @@ restart_int_handler: 
	lmg	%r6,%r15,__SF_GPRS(%r15) # load registers from clone

	stosm	__SF_EMPTY(%r15),0x04	# now we can turn dat on

	jg	start_secondary

#ifndef CONFIG_HOTPLUG_CPU

	.previous

#endif

#else

/*

 * If we do not run with SMP enabled, let the new CPU crash ...