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Commit 1db9b837 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] qdio: prevent stack clobber
  [S390] nohz: Fix __udelay.
parents 96d746c6 75f62761

arch/s390/kernel/time.c

+2 −0
Original line number Diff line number Diff line
@@ -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 *);

arch/s390/lib/delay.c

+54 −34
Original line number Diff line number Diff line 
/*

 *  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);

	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;

	} else

		mask = psw_kernel_bits | PSW_MASK_WAIT |

			PSW_MASK_EXT | PSW_MASK_IO;

	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);

	set_clock_comparator(S390_lowcore.clock_comparator);

}



	if (raw_irqs_disabled_flags(flags)) {

		__ctl_load(cr0, 0, 0);

		local_tick_enable(old_cc);

/*

 * 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 (!irq_context)

	if (raw_irqs_disabled_flags(flags)) {

		local_bh_disable();

		__udelay_disabled(usecs);

		_local_bh_enable();

	set_clock_comparator(S390_lowcore.clock_comparator);

		goto out;

	}

	__udelay_enabled(usecs);

out:

	local_irq_restore(flags);

	preempt_enable();

}

drivers/s390/cio/qdio_setup.c

+20 −35
Original line number Diff line number Diff line
@@ -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)