Dear RT Folks, I'm pleased to announce the 3.2.38-rt57 stable release.
You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git Head SHA1: 97eeac44604babd344fbcea25620de62ab520d88 Or to build 3.2.38-rt57 directly, the following patches should be applied: http://www.kernel.org/pub/linux/kernel/v3.x/linux-3.2.tar.xz http://www.kernel.org/pub/linux/kernel/v3.x/patch-3.2.38.xz http://www.kernel.org/pub/linux/kernel/projects/rt/3.2/patch-3.2.38-rt57.patch.xz You can also build from 3.2.38-rt56 by applying the incremental patch: http://www.kernel.org/pub/linux/kernel/projects/rt/3.2/incr/patch-3.2.38-rt56-rt57.patch.xz Enjoy, -- Steve Changes from 3.2.38-rt56: --- Steven Rostedt (1): Linux 3.2.38-rt57 Thomas Gleixner (5): drivers-tty-pl011-irq-disable-madness.patch mmci: Remove bogus local_irq_save() sched: Init idle->on_rq in init_idle() sched: Check for idle task in might_sleep() mm: swap: Initialize local locks early ---- drivers/mmc/host/mmci.c | 5 ----- drivers/tty/serial/amba-pl011.c | 15 ++++++++++----- kernel/sched.c | 4 +++- localversion-rt | 2 +- mm/swap.c | 12 +++++++++--- 5 files changed, 23 insertions(+), 15 deletions(-) --------------------------- diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 0726e59..5d7bf83 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -859,15 +859,12 @@ static irqreturn_t mmci_pio_irq(int irq, void *dev_id) struct sg_mapping_iter *sg_miter = &host->sg_miter; struct variant_data *variant = host->variant; void __iomem *base = host->base; - unsigned long flags; u32 status; status = readl(base + MMCISTATUS); dev_dbg(mmc_dev(host->mmc), "irq1 (pio) %08x\n", status); - local_irq_save(flags); - do { unsigned int remain, len; char *buffer; @@ -907,8 +904,6 @@ static irqreturn_t mmci_pio_irq(int irq, void *dev_id) sg_miter_stop(sg_miter); - local_irq_restore(flags); - /* * If we have less than the fifo 'half-full' threshold to transfer, * trigger a PIO interrupt as soon as any data is available. diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index fe9f111..1fbaf66 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -1761,13 +1761,19 @@ pl011_console_write(struct console *co, const char *s, unsigned int count) clk_enable(uap->clk); - local_irq_save(flags); + /* + * local_irq_save(flags); + * + * This local_irq_save() is nonsense. If we come in via sysrq + * handling then interrupts are already disabled. Aside of + * that the port.sysrq check is racy on SMP regardless. + */ if (uap->port.sysrq) locked = 0; else if (oops_in_progress) - locked = spin_trylock(&uap->port.lock); + locked = spin_trylock_irqsave(&uap->port.lock, flags); else - spin_lock(&uap->port.lock); + spin_lock_irqsave(&uap->port.lock, flags); /* * First save the CR then disable the interrupts @@ -1789,8 +1795,7 @@ pl011_console_write(struct console *co, const char *s, unsigned int count) writew(old_cr, uap->port.membase + UART011_CR); if (locked) - spin_unlock(&uap->port.lock); - local_irq_restore(flags); + spin_unlock_irqrestore(&uap->port.lock, flags); clk_disable(uap->clk); } diff --git a/kernel/sched.c b/kernel/sched.c index b318b4a..14219ed 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -6519,6 +6519,7 @@ void __cpuinit init_idle(struct task_struct *idle, int cpu) rcu_read_unlock(); rq->curr = rq->idle = idle; + idle->on_rq = 1; #if defined(CONFIG_SMP) idle->on_cpu = 1; #endif @@ -8936,7 +8937,8 @@ void __might_sleep(const char *file, int line, int preempt_offset) static unsigned long prev_jiffy; /* ratelimiting */ rcu_sleep_check(); /* WARN_ON_ONCE() by default, no rate limit reqd. */ - if ((preempt_count_equals(preempt_offset) && !irqs_disabled()) || + if ((preempt_count_equals(preempt_offset) && !irqs_disabled() && + !is_idle_task(current)) || system_state != SYSTEM_RUNNING || oops_in_progress) return; if (time_before(jiffies, prev_jiffy + HZ) && prev_jiffy) diff --git a/localversion-rt b/localversion-rt index fdb0f88..c06cc435 100644 --- a/localversion-rt +++ b/localversion-rt @@ -1 +1 @@ --rt56 +-rt57 diff --git a/mm/swap.c b/mm/swap.c index e3f7d6f..c428897 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -772,6 +772,15 @@ unsigned pagevec_lookup(struct pagevec *pvec, struct address_space *mapping, EXPORT_SYMBOL(pagevec_lookup); +/* Early setup for the local locks */ +static int __init swap_init_locks(void) +{ + local_irq_lock_init(rotate_lock); + local_irq_lock_init(swap_lock); + return 1; +} +early_initcall(swap_init_locks); + unsigned pagevec_lookup_tag(struct pagevec *pvec, struct address_space *mapping, pgoff_t *index, int tag, unsigned nr_pages) { @@ -789,9 +798,6 @@ void __init swap_setup(void) { unsigned long megs = totalram_pages >> (20 - PAGE_SHIFT); - local_irq_lock_init(rotate_lock); - local_irq_lock_init(swap_lock); - #ifdef CONFIG_SWAP bdi_init(swapper_space.backing_dev_info); #endif -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
