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Date: Fri, 22 Feb 2013 12:38:35 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: LKML <linux-kernel@...r.kernel.org>,
linux-rt-users <linux-rt-users@...r.kernel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>,
Carsten Emde <C.Emde@...dl.org>, John Kacur <jkacur@...hat.com>
Subject: [ANNOUNCE] 3.0.65-rt92
Dear RT Folks,
I'm pleased to announce the 3.0.65-rt92 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: f91338e92d1e0acb3f1efcb26725190d1feb9c4e
Or to build 3.0.65-rt92 directly, the following patches should be applied:
http://www.kernel.org/pub/linux/kernel/v3.0/linux-3.0.tar.xz
http://www.kernel.org/pub/linux/kernel/v3.0/patch-3.0.65.xz
http://www.kernel.org/pub/linux/kernel/projects/rt/3.0/patch-3.0.65-rt92.patch.xz
You can also build from 3.0.65-rt91 by applying the incremental patch:
http://www.kernel.org/pub/linux/kernel/projects/rt/3.0/incr/patch-3.0.65-rt91-rt92.patch.xz
Enjoy,
-- Steve
Changes from 3.0.65-rt91:
---
Steven Rostedt (2):
acpi/rt: Convert acpi_gbl_hardware lock back to a raw_spinlock_t
Linux 3.0.65-rt92
Thomas Gleixner (2):
x86/32: Use kmap switch for non highmem as well
rcutiny: Use simple waitqueue
----
arch/x86/kernel/process_32.c | 2 +-
drivers/acpi/acpica/acglobal.h | 2 +-
drivers/acpi/acpica/hwregs.c | 4 ++--
drivers/acpi/acpica/hwxface.c | 4 ++--
drivers/acpi/acpica/utmutex.c | 4 ++--
include/acpi/platform/aclinux.h | 14 ++++++++++++++
include/linux/sched.h | 4 +++-
kernel/rcutiny_plugin.h | 9 +++++----
localversion-rt | 2 +-
9 files changed, 31 insertions(+), 14 deletions(-)
---------------------------
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 95f2630..4a0d37f 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -336,7 +336,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
task_thread_info(next_p)->flags & _TIF_WORK_CTXSW_NEXT))
__switch_to_xtra(prev_p, next_p, tss);
-#if defined CONFIG_PREEMPT_RT_FULL && defined CONFIG_HIGHMEM
+#ifdef CONFIG_PREEMPT_RT_FULL
/*
* Save @prev's kmap_atomic stack
*/
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index 73863d8..3d208c8 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -230,7 +230,7 @@ ACPI_EXTERN u8 acpi_gbl_global_lock_pending;
* interrupt level
*/
ACPI_EXTERN acpi_spinlock acpi_gbl_gpe_lock; /* For GPE data structs and registers */
-ACPI_EXTERN acpi_spinlock acpi_gbl_hardware_lock; /* For ACPI H/W except GPE registers */
+ACPI_EXTERN acpi_raw_spinlock acpi_gbl_hardware_lock; /* For ACPI H/W except GPE registers */
/*****************************************************************************
*
diff --git a/drivers/acpi/acpica/hwregs.c b/drivers/acpi/acpica/hwregs.c
index 55accb7..1da9213 100644
--- a/drivers/acpi/acpica/hwregs.c
+++ b/drivers/acpi/acpica/hwregs.c
@@ -263,7 +263,7 @@ acpi_status acpi_hw_clear_acpi_status(void)
ACPI_BITMASK_ALL_FIXED_STATUS,
ACPI_FORMAT_UINT64(acpi_gbl_xpm1a_status.address)));
- lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
+ raw_spin_lock_irqsave(acpi_gbl_hardware_lock, lock_flags);
/* Clear the fixed events in PM1 A/B */
@@ -278,7 +278,7 @@ acpi_status acpi_hw_clear_acpi_status(void)
status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block, NULL);
unlock_and_exit:
- acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
+ raw_spin_unlock_irqrestore(acpi_gbl_hardware_lock, lock_flags);
return_ACPI_STATUS(status);
}
diff --git a/drivers/acpi/acpica/hwxface.c b/drivers/acpi/acpica/hwxface.c
index f75f81a..94a33ce 100644
--- a/drivers/acpi/acpica/hwxface.c
+++ b/drivers/acpi/acpica/hwxface.c
@@ -386,7 +386,7 @@ acpi_status acpi_write_bit_register(u32 register_id, u32 value)
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
- lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
+ raw_spin_lock_irqsave(acpi_gbl_hardware_lock, lock_flags);
/*
* At this point, we know that the parent register is one of the
@@ -447,7 +447,7 @@ acpi_status acpi_write_bit_register(u32 register_id, u32 value)
unlock_and_exit:
- acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
+ raw_spin_unlock_irqrestore(acpi_gbl_hardware_lock, lock_flags);
return_ACPI_STATUS(status);
}
diff --git a/drivers/acpi/acpica/utmutex.c b/drivers/acpi/acpica/utmutex.c
index 7d797e2..b611bf3 100644
--- a/drivers/acpi/acpica/utmutex.c
+++ b/drivers/acpi/acpica/utmutex.c
@@ -88,7 +88,7 @@ acpi_status acpi_ut_mutex_initialize(void)
return_ACPI_STATUS (status);
}
- status = acpi_os_create_lock (&acpi_gbl_hardware_lock);
+ status = acpi_os_create_raw_lock (&acpi_gbl_hardware_lock);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
@@ -135,7 +135,7 @@ void acpi_ut_mutex_terminate(void)
/* Delete the spinlocks */
acpi_os_delete_lock(acpi_gbl_gpe_lock);
- acpi_os_delete_lock(acpi_gbl_hardware_lock);
+ acpi_os_delete_raw_lock(acpi_gbl_hardware_lock);
/* Delete the reader/writer lock */
diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
index 2ce1be9..17d24de 100644
--- a/include/acpi/platform/aclinux.h
+++ b/include/acpi/platform/aclinux.h
@@ -74,6 +74,7 @@
#define acpi_cache_t struct kmem_cache
#define acpi_spinlock spinlock_t *
+#define acpi_raw_spinlock raw_spinlock_t *
#define acpi_cpu_flags unsigned long
#else /* !__KERNEL__ */
@@ -177,6 +178,19 @@ static inline void *acpi_os_acquire_object(acpi_cache_t * cache)
lock ? AE_OK : AE_NO_MEMORY; \
})
+#define acpi_os_create_raw_lock(__handle) \
+({ \
+ raw_spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \
+ \
+ if (lock) { \
+ *(__handle) = lock; \
+ raw_spin_lock_init(*(__handle)); \
+ } \
+ lock ? AE_OK : AE_NO_MEMORY; \
+})
+
+#define acpi_os_delete_raw_lock(__handle) kfree(__handle)
+
#endif /* __KERNEL__ */
#endif /* __ACLINUX_H__ */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 8772834..285ab45 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1602,9 +1602,11 @@ struct task_struct {
struct rcu_head put_rcu;
int softirq_nestcnt;
#endif
-#if defined CONFIG_PREEMPT_RT_FULL && defined CONFIG_HIGHMEM
+#ifdef CONFIG_PREEMPT_RT_FULL
+# if defined CONFIG_HIGHMEM || defined CONFIG_X86_32
int kmap_idx;
pte_t kmap_pte[KM_TYPE_NR];
+# endif
#endif
#ifdef CONFIG_DEBUG_PREEMPT
diff --git a/kernel/rcutiny_plugin.h b/kernel/rcutiny_plugin.h
index f259c67..1cd0c6e 100644
--- a/kernel/rcutiny_plugin.h
+++ b/kernel/rcutiny_plugin.h
@@ -25,6 +25,7 @@
#include <linux/kthread.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
+#include <linux/wait-simple.h>
#ifdef CONFIG_RCU_TRACE
#define RCU_TRACE(stmt) stmt
@@ -736,7 +737,7 @@ void synchronize_rcu(void)
}
EXPORT_SYMBOL_GPL(synchronize_rcu);
-static DECLARE_WAIT_QUEUE_HEAD(sync_rcu_preempt_exp_wq);
+static DEFINE_SWAIT_HEAD(sync_rcu_preempt_exp_wq);
static unsigned long sync_rcu_preempt_exp_count;
static DEFINE_MUTEX(sync_rcu_preempt_exp_mutex);
@@ -758,7 +759,7 @@ static int rcu_preempted_readers_exp(void)
*/
static void rcu_report_exp_done(void)
{
- wake_up(&sync_rcu_preempt_exp_wq);
+ swait_wake(&sync_rcu_preempt_exp_wq);
}
/*
@@ -810,8 +811,8 @@ void synchronize_rcu_expedited(void)
else {
rcu_initiate_boost();
local_irq_restore(flags);
- wait_event(sync_rcu_preempt_exp_wq,
- !rcu_preempted_readers_exp());
+ swait_event(sync_rcu_preempt_exp_wq,
+ !rcu_preempted_readers_exp());
}
/* Clean up and exit. */
diff --git a/localversion-rt b/localversion-rt
index e95e338..4905d52 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt91
+-rt92
--
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