From: John Kacur <jkacur@redhat.com>
To: Thomas Gleixner <tglx@linutronix.de>,
lkml <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>
Cc: Clark Williams <williams@redhat.com>, John Kacur <jkacur@redhat.com>
Subject: [PATCH 10/26] ACPI: Convert c3_lock to raw_spinlock
Date: Mon, 11 Jan 2010 22:26:40 +0100 [thread overview]
Message-ID: <1263245216-14754-11-git-send-email-jkacur@redhat.com> (raw)
In-Reply-To: <1263245216-14754-10-git-send-email-jkacur@redhat.com>
Convert locks which cannot sleep under preempt-rt to raw_spinlocks
See also 50fee3b3ad7cd773f0b50739bb0ed9ac43561c7d
Signed-off-by: John Kacur <jkacur@redhat.com>
---
drivers/acpi/processor_idle.c | 10 +++++-----
1 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index d1676b1..42b30d0 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -929,7 +929,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
}
static int c3_cpu_count;
-static DEFINE_SPINLOCK(c3_lock);
+static DEFINE_RAW_SPINLOCK(c3_lock);
/**
* acpi_idle_enter_bm - enters C3 with proper BM handling
@@ -1004,12 +1004,12 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
* without doing anything.
*/
if (pr->flags.bm_check && pr->flags.bm_control) {
- spin_lock(&c3_lock);
+ raw_spin_lock(&c3_lock);
c3_cpu_count++;
/* Disable bus master arbitration when all CPUs are in C3 */
if (c3_cpu_count == num_online_cpus())
acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 1);
- spin_unlock(&c3_lock);
+ raw_spin_unlock(&c3_lock);
} else if (!pr->flags.bm_check) {
ACPI_FLUSH_CPU_CACHE();
}
@@ -1018,10 +1018,10 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
/* Re-enable bus master arbitration */
if (pr->flags.bm_check && pr->flags.bm_control) {
- spin_lock(&c3_lock);
+ raw_spin_lock(&c3_lock);
acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 0);
c3_cpu_count--;
- spin_unlock(&c3_lock);
+ raw_spin_unlock(&c3_lock);
}
kt2 = ktime_get_real();
idle_time = ktime_to_us(ktime_sub(kt2, kt1));
--
1.6.5.2
next prev parent reply other threads:[~2010-01-11 21:30 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-11 21:26 [PATCH 00/26] Convert locks that can't sleep in -rt " John Kacur
2010-01-11 21:26 ` [PATCH 01/26] xtime_lock: Convert atomic_seqlock to raw_seqlock, fix up all users John Kacur
2010-01-11 21:26 ` [PATCH 02/26] seqlock: Create raw_seqlock John Kacur
2010-01-11 21:26 ` [PATCH 03/26] x86: Convert tlbstate_lock to raw_spinlock John Kacur
2010-01-11 21:26 ` [PATCH 04/26] sched: Convert thread_group_cputimer lock " John Kacur
2010-01-11 21:26 ` [PATCH 05/26] x86: Convert ioapic_lock and vector_lock to raw_spinlocks John Kacur
2010-01-11 21:26 ` [PATCH 06/26] x86: Convert i8259A_lock to raw_spinlock John Kacur
2010-01-11 21:26 ` [PATCH 07/26] x86: Convert pci_config_lock " John Kacur
2010-01-11 21:26 ` [PATCH 08/26] i8253: Convert i8253_lock " John Kacur
2010-01-11 21:26 ` [PATCH 09/26] x86: Convert set_atomicity_lock " John Kacur
2010-01-11 21:26 ` John Kacur [this message]
2010-01-11 21:26 ` [PATCH 11/26] rtmutex: Convert wait_lock and pi_lock " John Kacur
2010-01-11 21:26 ` [PATCH 12/26] printk: Convert lock " John Kacur
2010-01-11 21:26 ` [PATCH 13/26] genirq: Convert locks to raw_spinlocks John Kacur
2010-01-11 21:26 ` [PATCH 14/26] trace: Convert various locks to raw_spinlock John Kacur
2010-01-11 21:26 ` [PATCH 15/26] clocksource: Convert watchdog_lock " John Kacur
2010-01-11 21:26 ` [PATCH 16/26] timer_stats: Convert to raw_spinlocks John Kacur
2010-01-11 21:26 ` [PATCH 17/26] x86: kvm: Convert i8254/i8259 locks to raw_spinlock John Kacur
2010-01-11 21:26 ` [PATCH 18/26] x86 - nmi: Convert nmi_lock " John Kacur
2010-01-11 21:26 ` [PATCH 19/26] cgroups: Convert cgroups release_list_lock " John Kacur
2010-01-11 21:26 ` [PATCH 20/26] proportions: Convert spinlocks to raw_spinlocks John Kacur
2010-01-11 21:26 ` [PATCH 21/26] percpu_counter: Convert to raw_spinlock John Kacur
2010-01-11 21:26 ` [PATCH 22/26] oprofile: " John Kacur
2010-01-11 21:26 ` [PATCH 23/26] vgacon: Convert vga console lock " John Kacur
2010-01-11 21:26 ` [PATCH 24/26] pci-access: Convert pci_lock " John Kacur
2010-01-11 21:26 ` [PATCH 25/26] kprobes: Convert to raw_spinlocks John Kacur
2010-01-11 21:26 ` [PATCH 26/26] softlockup: " John Kacur
2010-01-12 3:54 ` [PATCH 25/26] kprobes: " Frederic Weisbecker
2010-01-11 21:50 ` [PATCH 19/26] cgroups: Convert cgroups release_list_lock to raw_spinlock Paul Menage
2010-01-11 22:11 ` John Kacur
2010-01-12 3:39 ` [PATCH 14/26] trace: Convert various locks " Frederic Weisbecker
2010-01-13 15:28 ` Steven Rostedt
2010-01-13 15:36 ` John Kacur
2010-01-13 15:41 ` Steven Rostedt
2010-01-13 18:09 ` John Kacur
2010-01-17 13:00 ` Frederic Weisbecker
2010-01-12 3:24 ` [PATCH 00/26] Convert locks that can't sleep in -rt " Frederic Weisbecker
2010-01-12 3:49 ` Frederic Weisbecker
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