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

* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
  [S390] fill out file list in s390 MAINTAINERS entry
  [S390] Add support for LZO-compressed kernels.
  [S390] cmm: get rid of CMM_PROC config option
  [S390] cmm: remove superfluous EXPORT_SYMBOLs plus cleanups
  [S390] dasd: unit check handling during internal cio I/O
  [S390] cio: unit check handling during internal I/O
  [S390] ccwgroup: add locking around drvdata access
  [S390] cio: remove stsch
  [S390] spp: remove KVM_AWARE_CMF config option
  [S390] kprobes: forbid probing of stnsm/stosm/epsw
  [S390] spp: fix compilation for CONFIG_32BIT
  [S390] atomic: implement atomic64_dec_if_positive
  [S390] cmm: fix crash on module unload
This commit is contained in:
Linus Torvalds 2010-05-27 10:48:46 -07:00
parent 4e455c6782 3bfe68580a
commit cc106eb35e
19 changed files with 135 additions and 113 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
MAINTAINERS
View File

@ -4836,6 +4836,9 @@ W: http://www.ibm.com/developerworks/linux/linux390/
S: Supported
F: arch/s390/
F: drivers/s390/
F: fs/partitions/ibm.c
F: Documentation/s390/
F: Documentation/DocBook/s390*
S390 NETWORK DRIVERS
M: Ursula Braun <ursula.braun@de.ibm.com>

8
arch/s390/Kconfig
View File

@ -102,6 +102,7 @@ config S390
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_BZIP2
select HAVE_KERNEL_LZMA
select HAVE_KERNEL_LZO
select ARCH_INLINE_SPIN_TRYLOCK
select ARCH_INLINE_SPIN_TRYLOCK_BH
select ARCH_INLINE_SPIN_LOCK
@ -479,13 +480,6 @@ config CMM
Everybody who wants to run Linux under VM should select this
option.
config CMM_PROC
bool "/proc interface to cooperative memory management"
depends on CMM
help
Select this option to enable the /proc interface to the
cooperative memory management.
config CMM_IUCV
bool "IUCV special message interface to cooperative memory management"
depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)

5
arch/s390/boot/compressed/Makefile
View File

@ -7,7 +7,7 @@
BITS := $(if $(CONFIG_64BIT),64,31)
targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 \
vmlinux.bin.lzma misc.o piggy.o sizes.h head$(BITS).o
vmlinux.bin.lzma vmlinux.bin.lzo misc.o piggy.o sizes.h head$(BITS).o
KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
KBUILD_CFLAGS += $(cflags-y)
@ -47,6 +47,7 @@ vmlinux.bin.all-y := $(obj)/vmlinux.bin
suffix-$(CONFIG_KERNEL_GZIP) := gz
suffix-$(CONFIG_KERNEL_BZIP2) := bz2
suffix-$(CONFIG_KERNEL_LZMA) := lzma
suffix-$(CONFIG_KERNEL_LZO) := lzo
$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y)
$(call if_changed,gzip)
@ -54,6 +55,8 @@ $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y)
$(call if_changed,bzip2)
$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y)
$(call if_changed,lzma)
$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y)
$(call if_changed,lzo)
LDFLAGS_piggy.o := -r --format binary --oformat $(LD_BFD) -T
$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix-y)

4
arch/s390/boot/compressed/misc.c
View File

@ -50,6 +50,10 @@ static unsigned long free_mem_end_ptr;
#include "../../../../lib/decompress_unlzma.c"
#endif
#ifdef CONFIG_KERNEL_LZO
#include "../../../../lib/decompress_unlzo.c"
#endif
extern _sclp_print_early(const char *);
int puts(const char *s)

19
arch/s390/include/asm/atomic.h
View File

@ -15,6 +15,7 @@
#include <linux/compiler.h>
#include <linux/types.h>
#include <asm/system.h>
#define ATOMIC_INIT(i) { (i) }
@ -274,6 +275,7 @@ static inline void atomic64_clear_mask(unsigned long long mask, atomic64_t *v)
static inline int atomic64_add_unless(atomic64_t *v, long long a, long long u)
{
long long c, old;
c = atomic64_read(v);
for (;;) {
if (unlikely(c == u))
@ -286,6 +288,23 @@ static inline int atomic64_add_unless(atomic64_t *v, long long a, long long u)
return c != u;
}
static inline long long atomic64_dec_if_positive(atomic64_t *v)
{
long long c, old, dec;
c = atomic64_read(v);
for (;;) {
dec = c - 1;
if (unlikely(dec < 0))
break;
old = atomic64_cmpxchg((v), c, dec);
if (likely(old == c))
break;
c = old;
}
return dec;
}
#define atomic64_add(_i, _v) atomic64_add_return(_i, _v)
#define atomic64_add_negative(_i, _v) (atomic64_add_return(_i, _v) < 0)
#define atomic64_inc(_v) atomic64_add_return(1, _v)

10
arch/s390/include/asm/ccwdev.h
View File

@ -91,6 +91,14 @@ struct ccw_device {
void (*handler) (struct ccw_device *, unsigned long, struct irb *);
};
/*
* Possible CIO actions triggered by the unit check handler.
*/
enum uc_todo {
UC_TODO_RETRY,
UC_TODO_RETRY_ON_NEW_PATH,
UC_TODO_STOP
};
/**
* struct ccw driver - device driver for channel attached devices
@ -107,6 +115,7 @@ struct ccw_device {
* @freeze: callback for freezing during hibernation snapshotting
* @thaw: undo work done in @freeze
* @restore: callback for restoring after hibernation
* @uc_handler: callback for unit check handler
* @driver: embedded device driver structure
* @name: device driver name
*/
@ -124,6 +133,7 @@ struct ccw_driver {
int (*freeze)(struct ccw_device *);
int (*thaw) (struct ccw_device *);
int (*restore)(struct ccw_device *);
enum uc_todo (*uc_handler) (struct ccw_device *, struct irb *);
struct device_driver driver;
char *name;
};

4
arch/s390/kernel/asm-offsets.c
View File

@ -132,8 +132,6 @@ int main(void)
DEFINE(__LC_MCCK_CLOCK, offsetof(struct _lowcore, mcck_clock));
DEFINE(__LC_MACHINE_FLAGS, offsetof(struct _lowcore, machine_flags));
DEFINE(__LC_FTRACE_FUNC, offsetof(struct _lowcore, ftrace_func));
DEFINE(__LC_SIE_HOOK, offsetof(struct _lowcore, sie_hook));
DEFINE(__LC_CMF_HPP, offsetof(struct _lowcore, cmf_hpp));
DEFINE(__LC_IRB, offsetof(struct _lowcore, irb));
DEFINE(__LC_CPU_TIMER_SAVE_AREA, offsetof(struct _lowcore, cpu_timer_save_area));
DEFINE(__LC_CLOCK_COMP_SAVE_AREA, offsetof(struct _lowcore, clock_comp_save_area));
@ -154,6 +152,8 @@ int main(void)
DEFINE(__LC_FP_CREG_SAVE_AREA, offsetof(struct _lowcore, fpt_creg_save_area));
DEFINE(__LC_LAST_BREAK, offsetof(struct _lowcore, breaking_event_addr));
DEFINE(__LC_VDSO_PER_CPU, offsetof(struct _lowcore, vdso_per_cpu_data));
DEFINE(__LC_SIE_HOOK, offsetof(struct _lowcore, sie_hook));
DEFINE(__LC_CMF_HPP, offsetof(struct _lowcore, cmf_hpp));
#endif /* CONFIG_32BIT */
return 0;
}

2
arch/s390/kernel/entry64.S
View File

@ -65,7 +65,7 @@ _TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
ltgr %r3,%r3
jz 0f
basr %r14,%r3
0:
0:
#endif
.endm

3
arch/s390/kernel/kprobes.c
View File

@ -63,6 +63,8 @@ int __kprobes is_prohibited_opcode(kprobe_opcode_t *instruction)
case 0x0b: /* bsm */
case 0x83: /* diag */
case 0x44: /* ex */
case 0xac: /* stnsm */
case 0xad: /* stosm */
return -EINVAL;
}
switch (*(__u16 *) instruction) {
@ -72,6 +74,7 @@ int __kprobes is_prohibited_opcode(kprobe_opcode_t *instruction)
case 0xb258: /* bsg */
case 0xb218: /* pc */
case 0xb228: /* pt */
case 0xb98d: /* epsw */
return -EINVAL;
}
return 0;

2
arch/s390/kernel/setup.c
View File

@ -401,7 +401,6 @@ setup_lowcore(void)
lc->io_new_psw.mask = psw_kernel_bits;
lc->io_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) io_int_handler;
lc->clock_comparator = -1ULL;
lc->cmf_hpp = -1ULL;
lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
lc->async_stack = (unsigned long)
__alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE;
@ -418,6 +417,7 @@ setup_lowcore(void)
__ctl_set_bit(14, 29);
}
#else
lc->cmf_hpp = -1ULL;
lc->vdso_per_cpu_data = (unsigned long) &lc->paste[0];
#endif
lc->sync_enter_timer = S390_lowcore.sync_enter_timer;

11
arch/s390/kvm/Kconfig
View File

@ -33,17 +33,6 @@ config KVM
If unsure, say N.
config KVM_AWARE_CMF
depends on KVM
bool "KVM aware sampling"
---help---
This option enhances the sampling data from the CPU Measurement
Facility with additional information, that allows to distinguish
guest(s) and host when using the kernel based virtual machine
functionality.
If unsure, say N.
# OK, it's a little counter-intuitive to do this, but it puts it neatly under
# the virtualization menu.
source drivers/vhost/Kconfig

4
arch/s390/kvm/sie64a.S
View File

@ -32,12 +32,10 @@ SPI_PSW = STACK_FRAME_OVERHEAD + __PT_PSW
.macro SPP newpp
#ifdef CONFIG_KVM_AWARE_CMF
tm __LC_MACHINE_FLAGS+6,0x20 # MACHINE_FLAG_SPP
jz 0f
.insn s,0xb2800000,\newpp
0:
#endif
0:
.endm
sie_irq_handler:

111
arch/s390/mm/cmm.c
View File

@ -1,11 +1,9 @@
/*
* arch/s390/mm/cmm.c
*
* S390 version
* Copyright (C) 2003 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*
* Collaborative memory management interface.
*
* Copyright IBM Corp 2003,2010
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
*
*/
#include <linux/errno.h>
@ -20,9 +18,9 @@
#include <linux/kthread.h>
#include <linux/oom.h>
#include <linux/suspend.h>
#include <linux/uaccess.h>
#include <asm/pgalloc.h>
#include <asm/uaccess.h>
#include <asm/diag.h>
static char *sender = "VMRMSVM";
@ -53,14 +51,14 @@ static struct cmm_page_array *cmm_timed_page_list;
static DEFINE_SPINLOCK(cmm_lock);
static struct task_struct *cmm_thread_ptr;
static wait_queue_head_t cmm_thread_wait;
static struct timer_list cmm_timer;
static DECLARE_WAIT_QUEUE_HEAD(cmm_thread_wait);
static DEFINE_TIMER(cmm_timer, NULL, 0, 0);
static void cmm_timer_fn(unsigned long);
static void cmm_set_timer(void);
static long
cmm_alloc_pages(long nr, long *counter, struct cmm_page_array **list)
static long cmm_alloc_pages(long nr, long *counter,
struct cmm_page_array **list)
{
struct cmm_page_array *pa, *npa;
unsigned long addr;
@ -99,8 +97,7 @@ cmm_alloc_pages(long nr, long *counter, struct cmm_page_array **list)
return nr;
}
static long
cmm_free_pages(long nr, long *counter, struct cmm_page_array **list)
static long cmm_free_pages(long nr, long *counter, struct cmm_page_array **list)
{
struct cmm_page_array *pa;
unsigned long addr;
@ -140,11 +137,10 @@ static int cmm_oom_notify(struct notifier_block *self,
}
static struct notifier_block cmm_oom_nb = {
.notifier_call = cmm_oom_notify
.notifier_call = cmm_oom_notify,
};
static int
cmm_thread(void *dummy)
static int cmm_thread(void *dummy)
{
int rc;
@ -170,7 +166,7 @@ cmm_thread(void *dummy)
cmm_timed_pages_target = cmm_timed_pages;
} else if (cmm_timed_pages_target < cmm_timed_pages) {
cmm_free_pages(1, &cmm_timed_pages,
&cmm_timed_page_list);
&cmm_timed_page_list);
}
if (cmm_timed_pages > 0 && !timer_pending(&cmm_timer))
cmm_set_timer();
@ -178,14 +174,12 @@ cmm_thread(void *dummy)
return 0;
}
static void
cmm_kick_thread(void)
static void cmm_kick_thread(void)
{
wake_up(&cmm_thread_wait);
}
static void
cmm_set_timer(void)
static void cmm_set_timer(void)
{
if (cmm_timed_pages_target <= 0 || cmm_timeout_seconds <= 0) {
if (timer_pending(&cmm_timer))
@ -202,8 +196,7 @@ cmm_set_timer(void)
add_timer(&cmm_timer);
}
static void
cmm_timer_fn(unsigned long ignored)
static void cmm_timer_fn(unsigned long ignored)
{
long nr;
@ -216,57 +209,49 @@ cmm_timer_fn(unsigned long ignored)
cmm_set_timer();
}
void
cmm_set_pages(long nr)
static void cmm_set_pages(long nr)
{
cmm_pages_target = nr;
cmm_kick_thread();
}
long
cmm_get_pages(void)
static long cmm_get_pages(void)
{
return cmm_pages;
}
void
cmm_add_timed_pages(long nr)
static void cmm_add_timed_pages(long nr)
{
cmm_timed_pages_target += nr;
cmm_kick_thread();
}
long
cmm_get_timed_pages(void)
static long cmm_get_timed_pages(void)
{
return cmm_timed_pages;
}
void
cmm_set_timeout(long nr, long seconds)
static void cmm_set_timeout(long nr, long seconds)
{
cmm_timeout_pages = nr;
cmm_timeout_seconds = seconds;
cmm_set_timer();
}
static int
cmm_skip_blanks(char *cp, char **endp)
static int cmm_skip_blanks(char *cp, char **endp)
{
char *str;
for (str = cp; *str == ' ' || *str == '\t'; str++);
for (str = cp; *str == ' ' || *str == '\t'; str++)
;
*endp = str;
return str != cp;
}
#ifdef CONFIG_CMM_PROC
static struct ctl_table cmm_table[];
static int
cmm_pages_handler(ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
static int cmm_pages_handler(ctl_table *ctl, int write, void __user *buffer,
size_t *lenp, loff_t *ppos)
{
char buf[16], *p;
long nr;
@ -305,9 +290,8 @@ cmm_pages_handler(ctl_table *ctl, int write,
return 0;
}
static int
cmm_timeout_handler(ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
static int cmm_timeout_handler(ctl_table *ctl, int write, void __user *buffer,
size_t *lenp, loff_t *ppos)
{
char buf[64], *p;
long nr, seconds;
@ -370,12 +354,10 @@ static struct ctl_table cmm_dir_table[] = {
},
{ }
};
#endif
#ifdef CONFIG_CMM_IUCV
#define SMSG_PREFIX "CMM"
static void
cmm_smsg_target(const char *from, char *msg)
static void cmm_smsg_target(const char *from, char *msg)
{
long nr, seconds;
@ -445,16 +427,13 @@ static struct notifier_block cmm_power_notifier = {
.notifier_call = cmm_power_event,
};
static int
cmm_init (void)
static int cmm_init(void)
{
int rc = -ENOMEM;
#ifdef CONFIG_CMM_PROC
cmm_sysctl_header = register_sysctl_table(cmm_dir_table);
if (!cmm_sysctl_header)
goto out_sysctl;
#endif
#ifdef CONFIG_CMM_IUCV
rc = smsg_register_callback(SMSG_PREFIX, cmm_smsg_target);
if (rc < 0)
@ -466,8 +445,6 @@ cmm_init (void)
rc = register_pm_notifier(&cmm_power_notifier);
if (rc)
goto out_pm;
init_waitqueue_head(&cmm_thread_wait);
init_timer(&cmm_timer);
cmm_thread_ptr = kthread_run(cmm_thread, NULL, "cmmthread");
rc = IS_ERR(cmm_thread_ptr) ? PTR_ERR(cmm_thread_ptr) : 0;
if (rc)
@ -483,36 +460,26 @@ out_oom_notify:
smsg_unregister_callback(SMSG_PREFIX, cmm_smsg_target);
out_smsg:
#endif
#ifdef CONFIG_CMM_PROC
unregister_sysctl_table(cmm_sysctl_header);
out_sysctl:
#endif
del_timer_sync(&cmm_timer);
return rc;
}
module_init(cmm_init);
static void
cmm_exit(void)
static void cmm_exit(void)
{
kthread_stop(cmm_thread_ptr);
unregister_pm_notifier(&cmm_power_notifier);
unregister_oom_notifier(&cmm_oom_nb);
cmm_free_pages(cmm_pages, &cmm_pages, &cmm_page_list);
cmm_free_pages(cmm_timed_pages, &cmm_timed_pages, &cmm_timed_page_list);
#ifdef CONFIG_CMM_PROC
unregister_sysctl_table(cmm_sysctl_header);
#endif
#ifdef CONFIG_CMM_IUCV
smsg_unregister_callback(SMSG_PREFIX, cmm_smsg_target);
#endif
unregister_pm_notifier(&cmm_power_notifier);
unregister_oom_notifier(&cmm_oom_nb);
kthread_stop(cmm_thread_ptr);
del_timer_sync(&cmm_timer);
cmm_free_pages(cmm_pages, &cmm_pages, &cmm_page_list);
cmm_free_pages(cmm_timed_pages, &cmm_timed_pages, &cmm_timed_page_list);
}
module_init(cmm_init);
module_exit(cmm_exit);
EXPORT_SYMBOL(cmm_set_pages);
EXPORT_SYMBOL(cmm_get_pages);
EXPORT_SYMBOL(cmm_add_timed_pages);
EXPORT_SYMBOL(cmm_get_timed_pages);
EXPORT_SYMBOL(cmm_set_timeout);
MODULE_LICENSE("GPL");

23
drivers/s390/block/dasd.c
View File

@ -1186,6 +1186,29 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
dasd_schedule_device_bh(device);
}
enum uc_todo dasd_generic_uc_handler(struct ccw_device *cdev, struct irb *irb)
{
struct dasd_device *device;
device = dasd_device_from_cdev_locked(cdev);
if (IS_ERR(device))
goto out;
if (test_bit(DASD_FLAG_OFFLINE, &device->flags) ||
device->state != device->target ||
!device->discipline->handle_unsolicited_interrupt){
dasd_put_device(device);
goto out;
}
dasd_device_clear_timer(device);
device->discipline->handle_unsolicited_interrupt(device, irb);
dasd_put_device(device);
out:
return UC_TODO_RETRY;
}
EXPORT_SYMBOL_GPL(dasd_generic_uc_handler);
/*
* If we have an error on a dasd_block layer request then we cancel
* and return all further requests from the same dasd_block as well.

1
drivers/s390/block/dasd_eckd.c
View File

@ -3436,6 +3436,7 @@ static struct ccw_driver dasd_eckd_driver = {
.freeze = dasd_generic_pm_freeze,
.thaw = dasd_generic_restore_device,
.restore = dasd_generic_restore_device,
.uc_handler = dasd_generic_uc_handler,
};
/*

1
drivers/s390/block/dasd_int.h
View File

@ -617,6 +617,7 @@ int dasd_generic_notify(struct ccw_device *, int);
void dasd_generic_handle_state_change(struct dasd_device *);
int dasd_generic_pm_freeze(struct ccw_device *);
int dasd_generic_restore_device(struct ccw_device *);
enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
int dasd_generic_read_dev_chars(struct dasd_device *, int, void *, int);
char *dasd_get_sense(struct irb *);

7
drivers/s390/cio/ccwgroup.c
View File

@ -123,8 +123,10 @@ ccwgroup_release (struct device *dev)
for (i = 0; i < gdev->count; i++) {
if (gdev->cdev[i]) {
spin_lock_irq(gdev->cdev[i]->ccwlock);
if (dev_get_drvdata(&gdev->cdev[i]->dev) == gdev)
dev_set_drvdata(&gdev->cdev[i]->dev, NULL);
spin_unlock_irq(gdev->cdev[i]->ccwlock);
put_device(&gdev->cdev[i]->dev);
}
}
@ -262,11 +264,14 @@ int ccwgroup_create_from_string(struct device *root, unsigned int creator_id,
goto error;
}
/* Don't allow a device to belong to more than one group. */
spin_lock_irq(gdev->cdev[i]->ccwlock);
if (dev_get_drvdata(&gdev->cdev[i]->dev)) {
spin_unlock_irq(gdev->cdev[i]->ccwlock);
rc = -EINVAL;
goto error;
}
dev_set_drvdata(&gdev->cdev[i]->dev, gdev);
spin_unlock_irq(gdev->cdev[i]->ccwlock);
}
/* Check for sufficient number of bus ids. */
if (i < num_devices && !curr_buf) {
@ -303,8 +308,10 @@ int ccwgroup_create_from_string(struct device *root, unsigned int creator_id,
error:
for (i = 0; i < num_devices; i++)
if (gdev->cdev[i]) {
spin_lock_irq(gdev->cdev[i]->ccwlock);
if (dev_get_drvdata(&gdev->cdev[i]->dev) == gdev)
dev_set_drvdata(&gdev->cdev[i]->dev, NULL);
spin_unlock_irq(gdev->cdev[i]->ccwlock);
put_device(&gdev->cdev[i]->dev);
gdev->cdev[i] = NULL;
}

15
drivers/s390/cio/ccwreq.c
View File

@ -159,6 +159,7 @@ static enum io_status ccwreq_status(struct ccw_device *cdev, struct irb *lcirb)
{
struct irb *irb = &cdev->private->irb;
struct cmd_scsw *scsw = &irb->scsw.cmd;
enum uc_todo todo;
/* Perform BASIC SENSE if needed. */
if (ccw_device_accumulate_and_sense(cdev, lcirb))
@ -178,6 +179,20 @@ static enum io_status ccwreq_status(struct ccw_device *cdev, struct irb *lcirb)
/* Check for command reject. */
if (irb->ecw[0] & SNS0_CMD_REJECT)
return IO_REJECTED;
/* Ask the driver what to do */
if (cdev->drv && cdev->drv->uc_handler) {
todo = cdev->drv->uc_handler(cdev, lcirb);
switch (todo) {
case UC_TODO_RETRY:
return IO_STATUS_ERROR;
case UC_TODO_RETRY_ON_NEW_PATH:
return IO_PATH_ERROR;
case UC_TODO_STOP:
return IO_REJECTED;
default:
return IO_STATUS_ERROR;
}
}
/* Assume that unexpected SENSE data implies an error. */
return IO_STATUS_ERROR;
}

15
drivers/s390/cio/ioasm.h
View File

@ -23,21 +23,6 @@ struct tpi_info {
* Some S390 specific IO instructions as inline
*/
static inline int stsch(struct subchannel_id schid, struct schib *addr)
{
register struct subchannel_id reg1 asm ("1") = schid;
int ccode;
asm volatile(
" stsch 0(%3)\n"
" ipm %0\n"
" srl %0,28"
: "=d" (ccode), "=m" (*addr)
: "d" (reg1), "a" (addr)
: "cc");
return ccode;
}
static inline int stsch_err(struct subchannel_id schid, struct schib *addr)
{
register struct subchannel_id reg1 asm ("1") = schid;