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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] correct address of _stext with CONFIG_SHARED_KERNEL=y
  [S390] ptrace: fix return value of do_syscall_trace_enter()
  [S390] dasd: fix race between tasklet and dasd_sleep_on
This commit is contained in:
Linus Torvalds 2010-05-12 18:47:55 -07:00
parent cdf5f61ed1 57d84906f0
commit 5ec390e046
4 changed files with 14 additions and 12 deletions
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2
arch/s390/kernel/head31.S
View File

@ -82,7 +82,7 @@ startup_continue:
_ehead:
#ifdef CONFIG_SHARED_KERNEL
.org 0x100000
.org 0x100000 - 0x11000 # head.o ends at 0x11000
#endif
#

2
arch/s390/kernel/head64.S
View File

@ -80,7 +80,7 @@ startup_continue:
_ehead:
#ifdef CONFIG_SHARED_KERNEL
.org 0x100000
.org 0x100000 - 0x11000 # head.o ends at 0x11000
#endif
#

5
arch/s390/kernel/ptrace.c
View File

@ -640,7 +640,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
{
long ret;
long ret = 0;
/* Do the secure computing check first. */
secure_computing(regs->gprs[2]);
@ -649,7 +649,6 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
* The sysc_tracesys code in entry.S stored the system
* call number to gprs[2].
*/
ret = regs->gprs[2];
if (test_thread_flag(TIF_SYSCALL_TRACE) &&
(tracehook_report_syscall_entry(regs) ||
regs->gprs[2] >= NR_syscalls)) {
@ -671,7 +670,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
regs->gprs[2], regs->orig_gpr2,
regs->gprs[3], regs->gprs[4],
regs->gprs[5]);
return ret;
return ret ?: regs->gprs[2];
}
asmlinkage void do_syscall_trace_exit(struct pt_regs *regs)

17
drivers/s390/block/dasd.c
View File

@ -37,6 +37,9 @@
*/
#define DASD_CHANQ_MAX_SIZE 4
#define DASD_SLEEPON_START_TAG (void *) 1
#define DASD_SLEEPON_END_TAG (void *) 2
/*
* SECTION: exported variables of dasd.c
*/
@ -1472,7 +1475,10 @@ void dasd_add_request_tail(struct dasd_ccw_req *cqr)
*/
static void dasd_wakeup_cb(struct dasd_ccw_req *cqr, void *data)
{
wake_up((wait_queue_head_t *) data);
spin_lock_irq(get_ccwdev_lock(cqr->startdev->cdev));
cqr->callback_data = DASD_SLEEPON_END_TAG;
spin_unlock_irq(get_ccwdev_lock(cqr->startdev->cdev));
wake_up(&generic_waitq);
}
static inline int _wait_for_wakeup(struct dasd_ccw_req *cqr)
@ -1482,10 +1488,7 @@ static inline int _wait_for_wakeup(struct dasd_ccw_req *cqr)
device = cqr->startdev;
spin_lock_irq(get_ccwdev_lock(device->cdev));
rc = ((cqr->status == DASD_CQR_DONE ||
cqr->status == DASD_CQR_NEED_ERP ||
cqr->status == DASD_CQR_TERMINATED) &&
list_empty(&cqr->devlist));
rc = (cqr->callback_data == DASD_SLEEPON_END_TAG);
spin_unlock_irq(get_ccwdev_lock(device->cdev));
return rc;
}
@ -1573,7 +1576,7 @@ static int _dasd_sleep_on(struct dasd_ccw_req *maincqr, int interruptible)
wait_event(generic_waitq, !(device->stopped));
cqr->callback = dasd_wakeup_cb;
cqr->callback_data = (void *) &generic_waitq;
cqr->callback_data = DASD_SLEEPON_START_TAG;
dasd_add_request_tail(cqr);
if (interruptible) {
rc = wait_event_interruptible(
@ -1652,7 +1655,7 @@ int dasd_sleep_on_immediatly(struct dasd_ccw_req *cqr)
}
cqr->callback = dasd_wakeup_cb;
cqr->callback_data = (void *) &generic_waitq;
cqr->callback_data = DASD_SLEEPON_START_TAG;
cqr->status = DASD_CQR_QUEUED;
list_add(&cqr->devlist, &device->ccw_queue);