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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] qdio: prevent stack clobber
  [S390] nohz: Fix __udelay.
This commit is contained in:
Linus Torvalds 2008-10-03 13:43:05 -07:00
parent 96d746c68f 75f6276187
commit 1db9b83738
3 changed files with 79 additions and 72 deletions
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2
arch/s390/kernel/time.c
View File

@ -169,6 +169,8 @@ void init_cpu_timer(void)
static void clock_comparator_interrupt(__u16 code)
{
if (S390_lowcore.clock_comparator == -1ULL)
set_clock_comparator(S390_lowcore.clock_comparator);
}
static void etr_timing_alert(struct etr_irq_parm *);

94
arch/s390/lib/delay.c
View File

@ -1,14 +1,9 @@
/*
* arch/s390/lib/delay.c
* Precise Delay Loops for S390
*
* S390 version
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
*
* Derived from "arch/i386/lib/delay.c"
* Copyright (C) 1993 Linus Torvalds
* Copyright (C) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
* Copyright IBM Corp. 1999,2008
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
* Heiko Carstens <heiko.carstens@de.ibm.com>,
*/
#include <linux/sched.h>
@ -29,30 +24,31 @@ void __delay(unsigned long loops)
asm volatile("0: brct %0,0b" : : "d" ((loops/2) + 1));
}
/*
* Waits for 'usecs' microseconds using the TOD clock comparator.
*/
void __udelay(unsigned long usecs)
static void __udelay_disabled(unsigned long usecs)
{
u64 end, time, old_cc = 0;
unsigned long flags, cr0, mask, dummy;
int irq_context;
unsigned long mask, cr0, cr0_saved;
u64 clock_saved;
irq_context = in_interrupt();
if (!irq_context)
local_bh_disable();
local_irq_save(flags);
if (raw_irqs_disabled_flags(flags)) {
old_cc = local_tick_disable();
S390_lowcore.clock_comparator = -1ULL;
__ctl_store(cr0, 0, 0);
dummy = (cr0 & 0xffff00e0) | 0x00000800;
__ctl_load(dummy , 0, 0);
mask = psw_kernel_bits | PSW_MASK_WAIT | PSW_MASK_EXT;
} else
mask = psw_kernel_bits | PSW_MASK_WAIT |
PSW_MASK_EXT | PSW_MASK_IO;
clock_saved = local_tick_disable();
set_clock_comparator(get_clock() + ((u64) usecs << 12));
__ctl_store(cr0_saved, 0, 0);
cr0 = (cr0_saved & 0xffff00e0) | 0x00000800;
__ctl_load(cr0 , 0, 0);
mask = psw_kernel_bits | PSW_MASK_WAIT | PSW_MASK_EXT;
trace_hardirqs_on();
__load_psw_mask(mask);
local_irq_disable();
__ctl_load(cr0_saved, 0, 0);
local_tick_enable(clock_saved);
set_clock_comparator(S390_lowcore.clock_comparator);
}
static void __udelay_enabled(unsigned long usecs)
{
unsigned long mask;
u64 end, time;
mask = psw_kernel_bits | PSW_MASK_WAIT | PSW_MASK_EXT | PSW_MASK_IO;
end = get_clock() + ((u64) usecs << 12);
do {
time = end < S390_lowcore.clock_comparator ?
@ -62,13 +58,37 @@ void __udelay(unsigned long usecs)
__load_psw_mask(mask);
local_irq_disable();
} while (get_clock() < end);
if (raw_irqs_disabled_flags(flags)) {
__ctl_load(cr0, 0, 0);
local_tick_enable(old_cc);
}
if (!irq_context)
_local_bh_enable();
set_clock_comparator(S390_lowcore.clock_comparator);
local_irq_restore(flags);
}
/*
* Waits for 'usecs' microseconds using the TOD clock comparator.
*/
void __udelay(unsigned long usecs)
{
unsigned long flags;
preempt_disable();
local_irq_save(flags);
if (in_irq()) {
__udelay_disabled(usecs);
goto out;
}
if (in_softirq()) {
if (raw_irqs_disabled_flags(flags))
__udelay_disabled(usecs);
else
__udelay_enabled(usecs);
goto out;
}
if (raw_irqs_disabled_flags(flags)) {
local_bh_disable();
__udelay_disabled(usecs);
_local_bh_enable();
goto out;
}
__udelay_enabled(usecs);
out:
local_irq_restore(flags);
preempt_enable();
}

55
drivers/s390/cio/qdio_setup.c
View File

@ -447,51 +447,36 @@ void qdio_print_subchannel_info(struct qdio_irq *irq_ptr,
{
char s[80];
sprintf(s, "%s sc:%x ", cdev->dev.bus_id, irq_ptr->schid.sch_no);
sprintf(s, "qdio: %s ", dev_name(&cdev->dev));
switch (irq_ptr->qib.qfmt) {
case QDIO_QETH_QFMT:
sprintf(s + strlen(s), "OSADE ");
sprintf(s + strlen(s), "OSA ");
break;
case QDIO_ZFCP_QFMT:
sprintf(s + strlen(s), "ZFCP ");
break;
case QDIO_IQDIO_QFMT:
sprintf(s + strlen(s), "HiperSockets ");
sprintf(s + strlen(s), "HS ");
break;
}
sprintf(s + strlen(s), "using: ");
if (!is_thinint_irq(irq_ptr))
sprintf(s + strlen(s), "no");
sprintf(s + strlen(s), "AdapterInterrupts ");
if (!(irq_ptr->sch_token != 0))
sprintf(s + strlen(s), "no");
sprintf(s + strlen(s), "QEBSM ");
if (!(irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED))
sprintf(s + strlen(s), "no");
sprintf(s + strlen(s), "OutboundPCI ");
if (!css_general_characteristics.aif_tdd)
sprintf(s + strlen(s), "no");
sprintf(s + strlen(s), "TDD\n");
printk(KERN_INFO "qdio: %s", s);
memset(s, 0, sizeof(s));
sprintf(s, "%s SIGA required: ", cdev->dev.bus_id);
if (irq_ptr->siga_flag.input)
sprintf(s + strlen(s), "Read ");
if (irq_ptr->siga_flag.output)
sprintf(s + strlen(s), "Write ");
if (irq_ptr->siga_flag.sync)
sprintf(s + strlen(s), "Sync ");
if (!irq_ptr->siga_flag.no_sync_ti)
sprintf(s + strlen(s), "SyncAI ");
if (!irq_ptr->siga_flag.no_sync_out_ti)
sprintf(s + strlen(s), "SyncOutAI ");
if (!irq_ptr->siga_flag.no_sync_out_pci)
sprintf(s + strlen(s), "SyncOutPCI");
sprintf(s + strlen(s), "on SC %x using ", irq_ptr->schid.sch_no);
sprintf(s + strlen(s), "AI:%d ", is_thinint_irq(irq_ptr));
sprintf(s + strlen(s), "QEBSM:%d ", (irq_ptr->sch_token) ? 1 : 0);
sprintf(s + strlen(s), "PCI:%d ",
(irq_ptr->qib.ac & QIB_AC_OUTBOUND_PCI_SUPPORTED) ? 1 : 0);
sprintf(s + strlen(s), "TDD:%d ", css_general_characteristics.aif_tdd);
sprintf(s + strlen(s), "SIGA:");
sprintf(s + strlen(s), "%s", (irq_ptr->siga_flag.input) ? "R" : " ");
sprintf(s + strlen(s), "%s", (irq_ptr->siga_flag.output) ? "W" : " ");
sprintf(s + strlen(s), "%s", (irq_ptr->siga_flag.sync) ? "S" : " ");
sprintf(s + strlen(s), "%s",
(!irq_ptr->siga_flag.no_sync_ti) ? "A" : " ");
sprintf(s + strlen(s), "%s",
(!irq_ptr->siga_flag.no_sync_out_ti) ? "O" : " ");
sprintf(s + strlen(s), "%s",
(!irq_ptr->siga_flag.no_sync_out_pci) ? "P" : " ");
sprintf(s + strlen(s), "\n");
printk(KERN_INFO "qdio: %s", s);
printk(KERN_INFO "%s", s);
}
int __init qdio_setup_init(void)