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OpenCloudOS-Kernel
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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] s390: fix single stepping on svc0
  [S390] sclp: undo quiesce handler override on resume
  [S390] reset cputime accounting after IPL from NSS
  [S390] monreader: fix use after free bug with suspend/resume
This commit is contained in:
Linus Torvalds 2009-11-14 12:57:39 -08:00
parent 7b8e2c1db0 bcc6525fb2
commit 0283243849
5 changed files with 56 additions and 18 deletions
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9
arch/s390/kernel/early.c
View File

@ -55,6 +55,7 @@ static void __init reset_tod_clock(void)
disabled_wait(0);
sched_clock_base_cc = TOD_UNIX_EPOCH;
S390_lowcore.last_update_clock = sched_clock_base_cc;
}
#ifdef CONFIG_SHARED_KERNEL
@ -167,6 +168,14 @@ static noinline __init void create_kernel_nss(void)
return;
}
/* re-initialize cputime accounting. */
sched_clock_base_cc = get_clock();
S390_lowcore.last_update_clock = sched_clock_base_cc;
S390_lowcore.last_update_timer = 0x7fffffffffffffffULL;
S390_lowcore.user_timer = 0;
S390_lowcore.system_timer = 0;
asm volatile("SPT 0(%0)" : : "a" (&S390_lowcore.last_update_timer));
/* re-setup boot command line with new ipl vm parms */
ipl_update_parameters();
setup_boot_command_line();

8
arch/s390/kernel/entry.S
View File

@ -565,10 +565,10 @@ pgm_svcper:
lh %r7,0x8a # get svc number from lowcore
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
l %r1,__TI_task(%r9)
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
l %r8,__TI_task(%r9)
mvc __THREAD_per+__PER_atmid(2,%r8),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(4,%r8),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r8),__LC_PER_ACCESS_ID
oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
TRACE_IRQS_ON
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts

8
arch/s390/kernel/entry64.S
View File

@ -543,10 +543,10 @@ pgm_svcper:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
llgh %r7,__LC_SVC_INT_CODE # get svc number from lowcore
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
lg %r1,__TI_task(%r9)
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(8,%r1),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
lg %r8,__TI_task(%r9)
mvc __THREAD_per+__PER_atmid(2,%r8),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(8,%r8),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r8),__LC_PER_ACCESS_ID
oi __TI_flags+7(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
TRACE_IRQS_ON
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts

1
drivers/s390/char/monreader.c
View File

@ -357,6 +357,7 @@ static int mon_close(struct inode *inode, struct file *filp)
atomic_set(&monpriv->msglim_count, 0);
monpriv->write_index = 0;
monpriv->read_index = 0;
dev_set_drvdata(monreader_device, NULL);
for (i = 0; i < MON_MSGLIM; i++)
kfree(monpriv->msg_array[i]);

48
drivers/s390/char/sclp_quiesce.c
View File

@ -20,9 +20,12 @@
#include "sclp.h"
static void (*old_machine_restart)(char *);
static void (*old_machine_halt)(void);
static void (*old_machine_power_off)(void);
/* Shutdown handler. Signal completion of shutdown by loading special PSW. */
static void
do_machine_quiesce(void)
static void do_machine_quiesce(void)
{
psw_t quiesce_psw;
@ -33,23 +36,48 @@ do_machine_quiesce(void)
}
/* Handler for quiesce event. Start shutdown procedure. */
static void
sclp_quiesce_handler(struct evbuf_header *evbuf)
static void sclp_quiesce_handler(struct evbuf_header *evbuf)
{
_machine_restart = (void *) do_machine_quiesce;
_machine_halt = do_machine_quiesce;
_machine_power_off = do_machine_quiesce;
if (_machine_restart != (void *) do_machine_quiesce) {
old_machine_restart = _machine_restart;
old_machine_halt = _machine_halt;
old_machine_power_off = _machine_power_off;
_machine_restart = (void *) do_machine_quiesce;
_machine_halt = do_machine_quiesce;
_machine_power_off = do_machine_quiesce;
}
ctrl_alt_del();
}
/* Undo machine restart/halt/power_off modification on resume */
static void sclp_quiesce_pm_event(struct sclp_register *reg,
enum sclp_pm_event sclp_pm_event)
{
switch (sclp_pm_event) {
case SCLP_PM_EVENT_RESTORE:
if (old_machine_restart) {
_machine_restart = old_machine_restart;
_machine_halt = old_machine_halt;
_machine_power_off = old_machine_power_off;
old_machine_restart = NULL;
old_machine_halt = NULL;
old_machine_power_off = NULL;
}
break;
case SCLP_PM_EVENT_FREEZE:
case SCLP_PM_EVENT_THAW:
break;
}
}
static struct sclp_register sclp_quiesce_event = {
.receive_mask = EVTYP_SIGQUIESCE_MASK,
.receiver_fn = sclp_quiesce_handler
.receiver_fn = sclp_quiesce_handler,
.pm_event_fn = sclp_quiesce_pm_event
};
/* Initialize quiesce driver. */
static int __init
sclp_quiesce_init(void)
static int __init sclp_quiesce_init(void)
{
return sclp_register(&sclp_quiesce_event);
}