A blast from the past!
On Wed, 2012-03-14 at 21:30 -0400, Steven Rostedt wrote:
> plain text document attachment
> (0001-rt-Revert-acpi-Make-gbl_-hardware-gpe-_lock-raw.patch)
> From: Steven Rostedt <srostedt@xxxxxxxxxx>
>
> Revert:
>
> commit bf30ab190c1237ba18f534455becc045422c891d
> Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Date: Mon Nov 28 17:09:54 2011 +0100
>
> acpi: Make gbl_[hardware|gpe]_lock raw
>
> These locks are taken in the guts of the idle code and cannot be
> converted to "sleeping" spinlocks on RT
>
> As they do not seem to be an issue, and they cause ACPI bugs.
Unfortunately, we just stumbled on an issue:
[ 5.898990] BUG: scheduling while atomic: swapper/3/0/0x00000002
[ 5.898991] no locks held by swapper/3/0.
[ 5.898993] Modules linked in:
[ 5.898996] Pid: 0, comm: swapper/3 Not tainted 3.6.11-rt28.19.el6rt.x86_64.debug #1
[ 5.898997] Call Trace:
[ 5.899011] [<ffffffff810804e7>] __schedule_bug+0x67/0x90
[ 5.899028] [<ffffffff81577923>] __schedule+0x793/0x7a0
[ 5.899032] [<ffffffff810b4e40>] ? debug_rt_mutex_print_deadlock+0x50/0x200
[ 5.899034] [<ffffffff81577b89>] schedule+0x29/0x70
[ 5.899036] BUG: scheduling while atomic: swapper/7/0/0x00000002
[ 5.899037] no locks held by swapper/7/0.
[ 5.899039] [<ffffffff81578525>] rt_spin_lock_slowlock+0xe5/0x2f0
[ 5.899040] Modules linked in:
[ 5.899041]
[ 5.899045] [<ffffffff81579a58>] ? _raw_spin_unlock_irqrestore+0x38/0x90
[ 5.899046] Pid: 0, comm: swapper/7 Not tainted 3.6.11-rt28.19.el6rt.x86_64.debug #1
[ 5.899047] Call Trace:
[ 5.899049] [<ffffffff81578bc6>] rt_spin_lock+0x16/0x40
[ 5.899052] [<ffffffff810804e7>] __schedule_bug+0x67/0x90
[ 5.899054] [<ffffffff8157d3f0>] ? notifier_call_chain+0x80/0x80
[ 5.899056] [<ffffffff81577923>] __schedule+0x793/0x7a0
[ 5.899059] [<ffffffff812f2034>] acpi_os_acquire_lock+0x1f/0x23
[ 5.899062] [<ffffffff810b4e40>] ? debug_rt_mutex_print_deadlock+0x50/0x200
[ 5.899068] [<ffffffff8130be64>] acpi_write_bit_register+0x33/0xb0
[ 5.899071] [<ffffffff81577b89>] schedule+0x29/0x70
[ 5.899072] [<ffffffff8130be13>] ? acpi_read_bit_register+0x33/0x51
[ 5.899074] [<ffffffff81578525>] rt_spin_lock_slowlock+0xe5/0x2f0
[ 5.899077] [<ffffffff8131d1fc>] acpi_idle_enter_bm+0x8a/0x28e
[ 5.899079] [<ffffffff81579a58>] ? _raw_spin_unlock_irqrestore+0x38/0x90
[ 5.899081] [<ffffffff8107e5da>] ? this_cpu_load+0x1a/0x30
[ 5.899083] [<ffffffff81578bc6>] rt_spin_lock+0x16/0x40
[ 5.899087] [<ffffffff8144c759>] cpuidle_enter+0x19/0x20
[ 5.899088] [<ffffffff8157d3f0>] ? notifier_call_chain+0x80/0x80
[ 5.899090] [<ffffffff8144c777>] cpuidle_enter_state+0x17/0x50
[ 5.899092] [<ffffffff812f2034>] acpi_os_acquire_lock+0x1f/0x23
[ 5.899094] [<ffffffff8144d1a1>] cpuidle899101] [<ffffffff8130be13>] ?
The acpi_idle_enter_bm() disables interrupts, and then calls
acpi_write_bit_register() which takes the (now sleeping) spin lock.
Now the question is, can we somehow do this without taking that lock, or
maybe not disabling interrupts. I don't know acpi code very well, and
I'm very uncomfortable making that decision.
-- Steve
>
> Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
> ---
> drivers/acpi/acpica/acglobal.h | 4 ++--
> drivers/acpi/acpica/evgpe.c | 4 ++--
> drivers/acpi/acpica/evgpeblk.c | 8 ++++----
> drivers/acpi/acpica/evgpeutil.c | 12 ++++++------
> drivers/acpi/acpica/evxface.c | 10 +++++-----
> drivers/acpi/acpica/evxfgpe.c | 24 ++++++++++++------------
> drivers/acpi/acpica/hwregs.c | 4 ++--
> drivers/acpi/acpica/hwxface.c | 4 ++--
> drivers/acpi/acpica/utmutex.c | 21 ++++++++++++++++++---
> 9 files changed, 53 insertions(+), 38 deletions(-)
>
> diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
> index 6c169a2..73863d8 100644
> --- a/drivers/acpi/acpica/acglobal.h
> +++ b/drivers/acpi/acpica/acglobal.h
> @@ -229,8 +229,8 @@ ACPI_EXTERN u8 acpi_gbl_global_lock_pending;
> * Spinlocks are used for interfaces that can be possibly called at
> * interrupt level
> */
> -extern raw_spinlock_t acpi_gbl_gpe_lock; /* For GPE data structs and registers */
> -extern raw_spinlock_t acpi_gbl_hardware_lock; /* For ACPI H/W except GPE registers */
> +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 */
>
> /*****************************************************************************
> *
> diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
> index 36e7e10..65c79ad 100644
> --- a/drivers/acpi/acpica/evgpe.c
> +++ b/drivers/acpi/acpica/evgpe.c
> @@ -357,7 +357,7 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list)
> * Note: Not necessary to obtain the hardware lock, since the GPE
> * registers are owned by the gpe_lock.
> */
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
>
> /* Examine all GPE blocks attached to this interrupt level */
>
> @@ -440,7 +440,7 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list)
>
> unlock_and_exit:
>
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> return (int_status);
> }
>
> diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
> index 60c47b9..ca2c41a 100644
> --- a/drivers/acpi/acpica/evgpeblk.c
> +++ b/drivers/acpi/acpica/evgpeblk.c
> @@ -95,7 +95,7 @@ acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block,
>
> /* Install the new block at the end of the list with lock */
>
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
> if (gpe_xrupt_block->gpe_block_list_head) {
> next_gpe_block = gpe_xrupt_block->gpe_block_list_head;
> while (next_gpe_block->next) {
> @@ -109,7 +109,7 @@ acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block,
> }
>
> gpe_block->xrupt_block = gpe_xrupt_block;
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
>
> unlock_and_exit:
> status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
> @@ -156,7 +156,7 @@ acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block)
> } else {
> /* Remove the block on this interrupt with lock */
>
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
> if (gpe_block->previous) {
> gpe_block->previous->next = gpe_block->next;
> } else {
> @@ -167,7 +167,7 @@ acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block)
> if (gpe_block->next) {
> gpe_block->next->previous = gpe_block->previous;
> }
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> }
>
> acpi_current_gpe_count -= gpe_block->gpe_count;
> diff --git a/drivers/acpi/acpica/evgpeutil.c b/drivers/acpi/acpica/evgpeutil.c
> index 895b68ab..80a81d0 100644
> --- a/drivers/acpi/acpica/evgpeutil.c
> +++ b/drivers/acpi/acpica/evgpeutil.c
> @@ -70,7 +70,7 @@ acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context)
>
> ACPI_FUNCTION_TRACE(ev_walk_gpe_list);
>
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
>
> /* Walk the interrupt level descriptor list */
>
> @@ -101,7 +101,7 @@ acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context)
> }
>
> unlock_and_exit:
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> return_ACPI_STATUS(status);
> }
>
> @@ -237,7 +237,7 @@ struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 interrupt_number)
>
> /* Install new interrupt descriptor with spin lock */
>
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
> if (acpi_gbl_gpe_xrupt_list_head) {
> next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
> while (next_gpe_xrupt->next) {
> @@ -249,7 +249,7 @@ struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 interrupt_number)
> } else {
> acpi_gbl_gpe_xrupt_list_head = gpe_xrupt;
> }
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
>
> /* Install new interrupt handler if not SCI_INT */
>
> @@ -306,7 +306,7 @@ acpi_status acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
>
> /* Unlink the interrupt block with lock */
>
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
> if (gpe_xrupt->previous) {
> gpe_xrupt->previous->next = gpe_xrupt->next;
> } else {
> @@ -318,7 +318,7 @@ acpi_status acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
> if (gpe_xrupt->next) {
> gpe_xrupt->next->previous = gpe_xrupt->previous;
> }
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
>
> /* Free the block */
>
> diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c
> index e849c10..e114140 100644
> --- a/drivers/acpi/acpica/evxface.c
> +++ b/drivers/acpi/acpica/evxface.c
> @@ -750,7 +750,7 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
> goto unlock_and_exit;
> }
>
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
>
> /* Ensure that we have a valid GPE number */
>
> @@ -798,14 +798,14 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
> ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
> gpe_event_info->flags |= (u8) (type | ACPI_GPE_DISPATCH_HANDLER);
>
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
>
> unlock_and_exit:
> (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
> return_ACPI_STATUS(status);
>
> free_and_exit:
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> ACPI_FREE(handler);
> goto unlock_and_exit;
> }
> @@ -852,7 +852,7 @@ acpi_remove_gpe_handler(acpi_handle gpe_device,
> return_ACPI_STATUS(status);
> }
>
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
>
> /* Ensure that we have a valid GPE number */
>
> @@ -903,7 +903,7 @@ acpi_remove_gpe_handler(acpi_handle gpe_device,
> ACPI_FREE(handler);
>
> unlock_and_exit:
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
>
> (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
> return_ACPI_STATUS(status);
> diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c
> index ce07ebb..52aaff3 100644
> --- a/drivers/acpi/acpica/evxfgpe.c
> +++ b/drivers/acpi/acpica/evxfgpe.c
> @@ -121,7 +121,7 @@ acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
>
> ACPI_FUNCTION_TRACE(acpi_enable_gpe);
>
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
>
> /* Ensure that we have a valid GPE number */
>
> @@ -130,7 +130,7 @@ acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
> status = acpi_ev_add_gpe_reference(gpe_event_info);
> }
>
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> return_ACPI_STATUS(status);
> }
> ACPI_EXPORT_SYMBOL(acpi_enable_gpe)
> @@ -158,7 +158,7 @@ acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
>
> ACPI_FUNCTION_TRACE(acpi_disable_gpe);
>
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
>
> /* Ensure that we have a valid GPE number */
>
> @@ -167,7 +167,7 @@ acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
> status = acpi_ev_remove_gpe_reference(gpe_event_info) ;
> }
>
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> return_ACPI_STATUS(status);
> }
> ACPI_EXPORT_SYMBOL(acpi_disable_gpe)
> @@ -214,7 +214,7 @@ acpi_setup_gpe_for_wake(acpi_handle wake_device,
> return_ACPI_STATUS(AE_BAD_PARAMETER);
> }
>
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
>
> /* Ensure that we have a valid GPE number */
>
> @@ -270,7 +270,7 @@ acpi_setup_gpe_for_wake(acpi_handle wake_device,
> status = AE_OK;
>
> unlock_and_exit:
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> return_ACPI_STATUS(status);
> }
> ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake)
> @@ -300,7 +300,7 @@ acpi_status acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 ac
>
> ACPI_FUNCTION_TRACE(acpi_set_gpe_wake_mask);
>
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
>
> /*
> * Ensure that we have a valid GPE number and that this GPE is in
> @@ -346,7 +346,7 @@ acpi_status acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 ac
> }
>
> unlock_and_exit:
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> return_ACPI_STATUS(status);
> }
>
> @@ -372,7 +372,7 @@ acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number)
>
> ACPI_FUNCTION_TRACE(acpi_clear_gpe);
>
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
>
> /* Ensure that we have a valid GPE number */
>
> @@ -385,7 +385,7 @@ acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number)
> status = acpi_hw_clear_gpe(gpe_event_info);
>
> unlock_and_exit:
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> return_ACPI_STATUS(status);
> }
>
> @@ -415,7 +415,7 @@ acpi_get_gpe_status(acpi_handle gpe_device,
>
> ACPI_FUNCTION_TRACE(acpi_get_gpe_status);
>
> - raw_spin_lock_irqsave(&acpi_gbl_gpe_lock, flags);
> + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
>
> /* Ensure that we have a valid GPE number */
>
> @@ -433,7 +433,7 @@ acpi_get_gpe_status(acpi_handle gpe_device,
> *event_status |= ACPI_EVENT_FLAG_HANDLE;
>
> unlock_and_exit:
> - raw_spin_unlock_irqrestore(&acpi_gbl_gpe_lock, flags);
> + acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> return_ACPI_STATUS(status);
> }
>
> diff --git a/drivers/acpi/acpica/hwregs.c b/drivers/acpi/acpica/hwregs.c
> index 4772930..55accb7 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)));
>
> - raw_spin_lock_irqsave(&acpi_gbl_hardware_lock, lock_flags);
> + lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
>
> /* 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:
> - raw_spin_unlock_irqrestore(&acpi_gbl_hardware_lock, lock_flags);
> + acpi_os_release_lock(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 76159ba..f75f81a 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);
> }
>
> - raw_spin_lock_irqsave(&acpi_gbl_hardware_lock, lock_flags);
> + lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock);
>
> /*
> * 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:
>
> - raw_spin_unlock_irqrestore(&acpi_gbl_hardware_lock, lock_flags);
> + acpi_os_release_lock(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 420eecf..7d797e2 100644
> --- a/drivers/acpi/acpica/utmutex.c
> +++ b/drivers/acpi/acpica/utmutex.c
> @@ -52,9 +52,6 @@ static acpi_status acpi_ut_create_mutex(acpi_mutex_handle mutex_id);
>
> static void acpi_ut_delete_mutex(acpi_mutex_handle mutex_id);
>
> -DEFINE_RAW_SPINLOCK(acpi_gbl_gpe_lock);
> -DEFINE_RAW_SPINLOCK(acpi_gbl_hardware_lock);
> -
> /*******************************************************************************
> *
> * FUNCTION: acpi_ut_mutex_initialize
> @@ -84,6 +81,18 @@ acpi_status acpi_ut_mutex_initialize(void)
> }
> }
>
> + /* Create the spinlocks for use at interrupt level */
> +
> + status = acpi_os_create_lock (&acpi_gbl_gpe_lock);
> + if (ACPI_FAILURE (status)) {
> + return_ACPI_STATUS (status);
> + }
> +
> + status = acpi_os_create_lock (&acpi_gbl_hardware_lock);
> + if (ACPI_FAILURE (status)) {
> + return_ACPI_STATUS (status);
> + }
> +
> /* Mutex for _OSI support */
> status = acpi_os_create_mutex(&acpi_gbl_osi_mutex);
> if (ACPI_FAILURE(status)) {
> @@ -123,7 +132,13 @@ void acpi_ut_mutex_terminate(void)
>
> acpi_os_delete_mutex(acpi_gbl_osi_mutex);
>
> + /* Delete the spinlocks */
> +
> + acpi_os_delete_lock(acpi_gbl_gpe_lock);
> + acpi_os_delete_lock(acpi_gbl_hardware_lock);
> +
> /* Delete the reader/writer lock */
> +
> acpi_ut_delete_rw_lock(&acpi_gbl_namespace_rw_lock);
> return_VOID;
> }
--
To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
