Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752763Ab2BTJi2 (ORCPT ); Mon, 20 Feb 2012 04:38:28 -0500 Received: from e06smtp11.uk.ibm.com ([195.75.94.107]:45146 "EHLO e06smtp11.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752505Ab2BTJiZ (ORCPT ); Mon, 20 Feb 2012 04:38:25 -0500 Date: Mon, 20 Feb 2012 10:37:54 +0100 From: Martin Schwidefsky To: Linus Torvalds Cc: linux-kernel , linux-s390 , Heiko Carstens Subject: [GIT PULL] s390 patches for 3.3-rc4 Message-ID: <20120220103754.40c113b2@de.ibm.com> Organization: IBM Corporation X-Mailer: Claws Mail 3.8.0 (GTK+ 2.24.9; i486-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit x-cbid: 12022009-5024-0000-0000-000001BE9199 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5143 Lines: 155 Hi Linus, please pull from 'for-linus' branch of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git for-linus to receive the following updates: Heiko Carstens (1): [S390] idle: avoid RCU usage in extended quiescent state Martin Schwidefsky (3): [S390] incorrect PageTables counter for kvm page tables [S390] 3215 deadlock with tty_wakeup [S390] correct ktime to tod clock comparator conversion arch/s390/kernel/process.c | 5 +++-- arch/s390/kernel/time.c | 7 +++++-- arch/s390/mm/pgtable.c | 2 +- drivers/s390/char/con3215.c | 22 +++++++++++++++------- 4 files changed, 24 insertions(+), 12 deletions(-) diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index 3201ae4..4261aa7 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -76,7 +76,6 @@ static void default_idle(void) if (test_thread_flag(TIF_MCCK_PENDING)) { local_mcck_enable(); local_irq_enable(); - s390_handle_mcck(); return; } trace_hardirqs_on(); @@ -93,10 +92,12 @@ void cpu_idle(void) for (;;) { tick_nohz_idle_enter(); rcu_idle_enter(); - while (!need_resched()) + while (!need_resched() && !test_thread_flag(TIF_MCCK_PENDING)) default_idle(); rcu_idle_exit(); tick_nohz_idle_exit(); + if (test_thread_flag(TIF_MCCK_PENDING)) + s390_handle_mcck(); preempt_enable_no_resched(); schedule(); preempt_disable(); diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c index fa02f44..14da278 100644 --- a/arch/s390/kernel/time.c +++ b/arch/s390/kernel/time.c @@ -113,11 +113,14 @@ static void fixup_clock_comparator(unsigned long long delta) static int s390_next_ktime(ktime_t expires, struct clock_event_device *evt) { + struct timespec ts; u64 nsecs; - nsecs = ktime_to_ns(ktime_sub(expires, ktime_get_monotonic_offset())); + ts.tv_sec = ts.tv_nsec = 0; + monotonic_to_bootbased(&ts); + nsecs = ktime_to_ns(ktime_add(timespec_to_ktime(ts), expires)); do_div(nsecs, 125); - S390_lowcore.clock_comparator = TOD_UNIX_EPOCH + (nsecs << 9); + S390_lowcore.clock_comparator = sched_clock_base_cc + (nsecs << 9); set_clock_comparator(S390_lowcore.clock_comparator); return 0; } diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c index 9a4d02f..51b0738 100644 --- a/arch/s390/mm/pgtable.c +++ b/arch/s390/mm/pgtable.c @@ -574,7 +574,7 @@ static inline void page_table_free_pgste(unsigned long *table) page = pfn_to_page(__pa(table) >> PAGE_SHIFT); mp = (struct gmap_pgtable *) page->index; BUG_ON(!list_empty(&mp->mapper)); - pgtable_page_ctor(page); + pgtable_page_dtor(page); atomic_set(&page->_mapcount, -1); kfree(mp); __free_page(page); diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c index 934458a..e71a50d 100644 --- a/drivers/s390/char/con3215.c +++ b/drivers/s390/char/con3215.c @@ -87,6 +87,7 @@ struct raw3215_info { struct tty_struct *tty; /* pointer to tty structure if present */ struct raw3215_req *queued_read; /* pointer to queued read requests */ struct raw3215_req *queued_write;/* pointer to queued write requests */ + struct tasklet_struct tlet; /* tasklet to invoke tty_wakeup */ wait_queue_head_t empty_wait; /* wait queue for flushing */ struct timer_list timer; /* timer for delayed output */ int line_pos; /* position on the line (for tabs) */ @@ -334,19 +335,23 @@ static inline void raw3215_try_io(struct raw3215_info *raw) } /* + * Call tty_wakeup from tasklet context + */ +static void raw3215_wakeup(unsigned long data) +{ + struct raw3215_info *raw = (struct raw3215_info *) data; + tty_wakeup(raw->tty); +} + +/* * Try to start the next IO and wake up processes waiting on the tty. */ static void raw3215_next_io(struct raw3215_info *raw) { - struct tty_struct *tty; - raw3215_mk_write_req(raw); raw3215_try_io(raw); - tty = raw->tty; - if (tty != NULL && - RAW3215_BUFFER_SIZE - raw->count >= RAW3215_MIN_SPACE) { - tty_wakeup(tty); - } + if (raw->tty && RAW3215_BUFFER_SIZE - raw->count >= RAW3215_MIN_SPACE) + tasklet_schedule(&raw->tlet); } /* @@ -682,6 +687,7 @@ static int raw3215_probe (struct ccw_device *cdev) return -ENOMEM; } init_waitqueue_head(&raw->empty_wait); + tasklet_init(&raw->tlet, raw3215_wakeup, (unsigned long) raw); dev_set_drvdata(&cdev->dev, raw); cdev->handler = raw3215_irq; @@ -901,6 +907,7 @@ static int __init con3215_init(void) raw->flags |= RAW3215_FIXED; init_waitqueue_head(&raw->empty_wait); + tasklet_init(&raw->tlet, raw3215_wakeup, (unsigned long) raw); /* Request the console irq */ if (raw3215_startup(raw) != 0) { @@ -966,6 +973,7 @@ static void tty3215_close(struct tty_struct *tty, struct file * filp) tty->closing = 1; /* Shutdown the terminal */ raw3215_shutdown(raw); + tasklet_kill(&raw->tlet); tty->closing = 0; raw->tty = NULL; } -- 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/