Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753834AbYJCUbx (ORCPT ); Fri, 3 Oct 2008 16:31:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752687AbYJCUbn (ORCPT ); Fri, 3 Oct 2008 16:31:43 -0400 Received: from mtagate7.de.ibm.com ([195.212.29.156]:48592 "EHLO mtagate7.de.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752646AbYJCUbm (ORCPT ); Fri, 3 Oct 2008 16:31:42 -0400 Subject: [GIT PULL] last minute s390 fixes for 2.6.27 From: Martin Schwidefsky Reply-To: schwidefsky@de.ibm.com To: Linus Torvalds Cc: Heiko Carstens , linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org Content-Type: text/plain Organization: IBM Corporation Date: Fri, 03 Oct 2008 22:06:09 +0200 Message-Id: <1223064369.31517.3.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.22.3.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7274 Lines: 233 Hi Linus, please pull from 'for-linus' branch of git://git390.osdl.marist.edu/pub/scm/linux-2.6.git for-linus to receive fixes for two regressions: Heiko Carstens (1): [S390] nohz: Fix __udelay. Jan Glauber (1): [S390] qdio: prevent stack clobber arch/s390/kernel/time.c | 2 + arch/s390/lib/delay.c | 88 +++++++++++++++++++++++++---------------- drivers/s390/cio/qdio_setup.c | 55 +++++++++---------------- 3 files changed, 76 insertions(+), 69 deletions(-) diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c index ca114fe..06acb1a 100644 --- a/arch/s390/kernel/time.c +++ b/arch/s390/kernel/time.c @@ -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 *); diff --git a/arch/s390/lib/delay.c b/arch/s390/lib/delay.c index fc6ab60..0953cee 100644 --- a/arch/s390/lib/delay.c +++ b/arch/s390/lib/delay.c @@ -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 + * Copyright IBM Corp. 1999,2008 + * Author(s): Martin Schwidefsky , + * Heiko Carstens , */ #include @@ -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); + 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(); } diff --git a/drivers/s390/cio/qdio_setup.c b/drivers/s390/cio/qdio_setup.c index 1679e2f..a0b6b46 100644 --- a/drivers/s390/cio/qdio_setup.c +++ b/drivers/s390/cio/qdio_setup.c @@ -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) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/