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Subject[ANNOUNCE] 3.6.11-rt30
Dear RT Folks,

I'm pleased to announce the 3.6.11-rt30 release.

Changes since 3.6.11-rt29:

1) Fix a deadlock on imx serial

2) Fix a ACPI scheduling while atomic issue (Steven)

3) Fix a longstanding mainline issue in printk (Yitian Bu)

I know I said that a few days ago already, but this is
probably^Whopefully the last release for 3.6 from my side. Steven
might keep it maintained until the 3.8-rt stabilizes, but that's not
yet decided.

The delta patch against 3.6.11-rt29 is appended below and can be found
here:

http://www.kernel.org/pub/linux/kernel/projects/rt/3.6/incr/patch-3.6.11-rt29-rt30.pa
tch.xz

The RT patch against 3.6.11 can be found here:

http://www.kernel.org/pub/linux/kernel/projects/rt/3.6/patch-3.6.11-rt30.patch.xz

The split quilt queue is available at:

http://www.kernel.org/pub/linux/kernel/projects/rt/3.6/patches-3.6.11-rt30.tar.xz

Enjoy,

tglx

Index: linux-stable/kernel/printk.c
===================================================================
--- linux-stable.orig/kernel/printk.c
+++ linux-stable/kernel/printk.c
@@ -1412,9 +1412,9 @@ static int console_trylock_for_printk(un
}
}
logbuf_cpu = UINT_MAX;
+ raw_spin_unlock(&logbuf_lock);
if (wake)
up(&console_sem);
- raw_spin_unlock(&logbuf_lock);
return retval;
}

Index: linux-stable/localversion-rt
===================================================================
--- linux-stable.orig/localversion-rt
+++ linux-stable/localversion-rt
@@ -1 +1 @@
--rt29
+-rt30
Index: linux-stable/drivers/acpi/acpica/acglobal.h
===================================================================
--- linux-stable.orig/drivers/acpi/acpica/acglobal.h
+++ linux-stable/drivers/acpi/acpica/acglobal.h
@@ -251,7 +251,7 @@ ACPI_EXTERN u8 acpi_gbl_global_lock_pend
* 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 */

/*****************************************************************************
*
Index: linux-stable/drivers/acpi/acpica/hwregs.c
===================================================================
--- linux-stable.orig/drivers/acpi/acpica/hwregs.c
+++ linux-stable/drivers/acpi/acpica/hwregs.c
@@ -271,14 +271,14 @@ acpi_status acpi_hw_clear_acpi_status(vo
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 */

status = acpi_hw_register_write(ACPI_REGISTER_PM1_STATUS,
ACPI_BITMASK_ALL_FIXED_STATUS);

- acpi_os_release_lock(acpi_gbl_hardware_lock, lock_flags);
+ raw_spin_unlock_irqrestore(acpi_gbl_hardware_lock, lock_flags);

if (ACPI_FAILURE(status))
goto exit;
Index: linux-stable/drivers/acpi/acpica/hwxface.c
===================================================================
--- linux-stable.orig/drivers/acpi/acpica/hwxface.c
+++ linux-stable/drivers/acpi/acpica/hwxface.c
@@ -366,7 +366,7 @@ acpi_status acpi_write_bit_register(u32
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
@@ -427,7 +427,7 @@ acpi_status acpi_write_bit_register(u32

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);
}

Index: linux-stable/drivers/acpi/acpica/utmutex.c
===================================================================
--- linux-stable.orig/drivers/acpi/acpica/utmutex.c
+++ linux-stable/drivers/acpi/acpica/utmutex.c
@@ -88,7 +88,7 @@ acpi_status acpi_ut_mutex_initialize(voi
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 */

Index: linux-stable/include/acpi/platform/aclinux.h
===================================================================
--- linux-stable.orig/include/acpi/platform/aclinux.h
+++ linux-stable/include/acpi/platform/aclinux.h
@@ -72,6 +72,7 @@

#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__ */
@@ -175,6 +176,19 @@ static inline void *acpi_os_acquire_obje
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__ */
Index: linux-stable/drivers/tty/serial/imx.c
===================================================================
--- linux-stable.orig/drivers/tty/serial/imx.c
+++ linux-stable/drivers/tty/serial/imx.c
@@ -1213,8 +1213,14 @@ imx_console_write(struct console *co, co
struct imx_port_ucrs old_ucr;
unsigned int ucr1;
unsigned long flags;
+ int locked = 1;

- spin_lock_irqsave(&sport->port.lock, flags);
+ if (sport->port.sysrq)
+ locked = 0;
+ else if (oops_in_progress)
+ locked = spin_trylock_irqsave(&sport->port.lock, flags);
+ else
+ spin_lock_irqsave(&sport->port.lock, flags);

/*
* First, save UCR1/2/3 and then disable interrupts
@@ -1241,7 +1247,8 @@ imx_console_write(struct console *co, co

imx_port_ucrs_restore(&sport->port, &old_ucr);

- spin_unlock_irqrestore(&sport->port.lock, flags);
+ if (locked)
+ spin_unlock_irqrestore(&sport->port.lock, flags);
}

/*

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