From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964775AbcJYJE2 (ORCPT ); Tue, 25 Oct 2016 05:04:28 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:59341 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1758613AbcJYJD2 (ORCPT ); Tue, 25 Oct 2016 05:03:28 -0400 From: Christian Borntraeger To: Peter Zijlstra Cc: Ingo Molnar , Nicholas Piggin , linux-kernel@vger.kernel.org, linux-s390 , linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Heiko Carstens , Martin Schwidefsky , Noam Camus , sparclinux@vger.kernel.org, x86@kernel.org, Will Deacon , Catalin Marinas , Russell King , virtualization@lists.linux-foundation.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, Christian Borntraeger Subject: [GIT PULL v2 4/5] processor.h: Remove cpu_relax_lowlatency users Date: Tue, 25 Oct 2016 11:03:14 +0200 X-Mailer: git-send-email 2.5.5 In-Reply-To: <1477386195-32736-1-git-send-email-borntraeger@de.ibm.com> References: <1477386195-32736-1-git-send-email-borntraeger@de.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16102509-0024-0000-0000-00000239E994 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16102509-0025-0000-0000-000020EAA19D Message-Id: <1477386195-32736-5-git-send-email-borntraeger@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-10-25_06:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=3 spamscore=3 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1609300000 definitions=main-1610250152 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org With the s390 special case of a yielding cpu_relax implementation gone, we can now remove all users of cpu_relax_lowlatency and replace them with cpu_relax. Signed-off-by: Christian Borntraeger --- drivers/gpu/drm/i915/i915_gem_request.c | 2 +- drivers/vhost/net.c | 4 ++-- kernel/locking/mcs_spinlock.h | 4 ++-- kernel/locking/mutex.c | 4 ++-- kernel/locking/osq_lock.c | 6 +++--- kernel/locking/qrwlock.c | 6 +++--- kernel/locking/rwsem-xadd.c | 4 ++-- lib/lockref.c | 2 +- 8 files changed, 16 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c index 8832f8e..383d134 100644 --- a/drivers/gpu/drm/i915/i915_gem_request.c +++ b/drivers/gpu/drm/i915/i915_gem_request.c @@ -723,7 +723,7 @@ bool __i915_spin_request(const struct drm_i915_gem_request *req, if (busywait_stop(timeout_us, cpu)) break; - cpu_relax_lowlatency(); + cpu_relax(); } while (!need_resched()); return false; diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 5dc128a..5dc3465 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -342,7 +342,7 @@ static int vhost_net_tx_get_vq_desc(struct vhost_net *net, endtime = busy_clock() + vq->busyloop_timeout; while (vhost_can_busy_poll(vq->dev, endtime) && vhost_vq_avail_empty(vq->dev, vq)) - cpu_relax_lowlatency(); + cpu_relax(); preempt_enable(); r = vhost_get_vq_desc(vq, vq->iov, ARRAY_SIZE(vq->iov), out_num, in_num, NULL, NULL); @@ -533,7 +533,7 @@ static int vhost_net_rx_peek_head_len(struct vhost_net *net, struct sock *sk) while (vhost_can_busy_poll(&net->dev, endtime) && !sk_has_rx_data(sk) && vhost_vq_avail_empty(&net->dev, vq)) - cpu_relax_lowlatency(); + cpu_relax(); preempt_enable(); diff --git a/kernel/locking/mcs_spinlock.h b/kernel/locking/mcs_spinlock.h index c835270..6a385aa 100644 --- a/kernel/locking/mcs_spinlock.h +++ b/kernel/locking/mcs_spinlock.h @@ -28,7 +28,7 @@ struct mcs_spinlock { #define arch_mcs_spin_lock_contended(l) \ do { \ while (!(smp_load_acquire(l))) \ - cpu_relax_lowlatency(); \ + cpu_relax(); \ } while (0) #endif @@ -108,7 +108,7 @@ void mcs_spin_unlock(struct mcs_spinlock **lock, struct mcs_spinlock *node) return; /* Wait until the next pointer is set */ while (!(next = READ_ONCE(node->next))) - cpu_relax_lowlatency(); + cpu_relax(); } /* Pass lock to next waiter. */ diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c index a70b90d..4463405 100644 --- a/kernel/locking/mutex.c +++ b/kernel/locking/mutex.c @@ -241,7 +241,7 @@ bool mutex_spin_on_owner(struct mutex *lock, struct task_struct *owner) break; } - cpu_relax_lowlatency(); + cpu_relax(); } rcu_read_unlock(); @@ -377,7 +377,7 @@ static bool mutex_optimistic_spin(struct mutex *lock, * memory barriers as we'll eventually observe the right * values at the cost of a few extra spins. */ - cpu_relax_lowlatency(); + cpu_relax(); } osq_unlock(&lock->osq); diff --git a/kernel/locking/osq_lock.c b/kernel/locking/osq_lock.c index 05a3785..4ea2710 100644 --- a/kernel/locking/osq_lock.c +++ b/kernel/locking/osq_lock.c @@ -75,7 +75,7 @@ osq_wait_next(struct optimistic_spin_queue *lock, break; } - cpu_relax_lowlatency(); + cpu_relax(); } return next; @@ -122,7 +122,7 @@ bool osq_lock(struct optimistic_spin_queue *lock) if (need_resched()) goto unqueue; - cpu_relax_lowlatency(); + cpu_relax(); } return true; @@ -148,7 +148,7 @@ bool osq_lock(struct optimistic_spin_queue *lock) if (smp_load_acquire(&node->locked)) return true; - cpu_relax_lowlatency(); + cpu_relax(); /* * Or we race against a concurrent unqueue()'s step-B, in which diff --git a/kernel/locking/qrwlock.c b/kernel/locking/qrwlock.c index 19248dd..cc3ed0c 100644 --- a/kernel/locking/qrwlock.c +++ b/kernel/locking/qrwlock.c @@ -54,7 +54,7 @@ static __always_inline void rspin_until_writer_unlock(struct qrwlock *lock, u32 cnts) { while ((cnts & _QW_WMASK) == _QW_LOCKED) { - cpu_relax_lowlatency(); + cpu_relax(); cnts = atomic_read_acquire(&lock->cnts); } } @@ -130,7 +130,7 @@ void queued_write_lock_slowpath(struct qrwlock *lock) (cmpxchg_relaxed(&l->wmode, 0, _QW_WAITING) == 0)) break; - cpu_relax_lowlatency(); + cpu_relax(); } /* When no more readers, set the locked flag */ @@ -141,7 +141,7 @@ void queued_write_lock_slowpath(struct qrwlock *lock) _QW_LOCKED) == _QW_WAITING)) break; - cpu_relax_lowlatency(); + cpu_relax(); } unlock: arch_spin_unlock(&lock->wait_lock); diff --git a/kernel/locking/rwsem-xadd.c b/kernel/locking/rwsem-xadd.c index 2337b4b..2fa2e2e6 100644 --- a/kernel/locking/rwsem-xadd.c +++ b/kernel/locking/rwsem-xadd.c @@ -368,7 +368,7 @@ static noinline bool rwsem_spin_on_owner(struct rw_semaphore *sem) return false; } - cpu_relax_lowlatency(); + cpu_relax(); } rcu_read_unlock(); out: @@ -423,7 +423,7 @@ static bool rwsem_optimistic_spin(struct rw_semaphore *sem) * memory barriers as we'll eventually observe the right * values at the cost of a few extra spins. */ - cpu_relax_lowlatency(); + cpu_relax(); } osq_unlock(&sem->osq); done: diff --git a/lib/lockref.c b/lib/lockref.c index 5a92189..c4bfcb8 100644 --- a/lib/lockref.c +++ b/lib/lockref.c @@ -20,7 +20,7 @@ if (likely(old.lock_count == prev.lock_count)) { \ SUCCESS; \ } \ - cpu_relax_lowlatency(); \ + cpu_relax(); \ } \ } while (0) -- 2.5.5 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christian Borntraeger Subject: [GIT PULL v2 4/5] processor.h: Remove cpu_relax_lowlatency users Date: Tue, 25 Oct 2016 11:03:14 +0200 Message-ID: <1477386195-32736-5-git-send-email-borntraeger@de.ibm.com> References: <1477386195-32736-1-git-send-email-borntraeger@de.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1477386195-32736-1-git-send-email-borntraeger@de.ibm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org List-Archive: List-Post: To: Peter Zijlstra Cc: linux-arch@vger.kernel.org, linux-s390 , kvm@vger.kernel.org, Will Deacon , x86@kernel.org, Heiko Carstens , linux-kernel@vger.kernel.org, Nicholas Piggin , Russell King , sparclinux@vger.kernel.org, Noam Camus , Catalin Marinas , Martin Schwidefsky , xen-devel@lists.xenproject.org, virtualization@lists.linux-foundation.org, linuxppc-dev@lists.ozlabs.org, Ingo Molnar List-ID: With the s390 special case of a yielding cpu_relax implementation gone, we can now remove all users of cpu_relax_lowlatency and replace them with cpu_relax. Signed-off-by: Christian Borntraeger --- drivers/gpu/drm/i915/i915_gem_request.c | 2 +- drivers/vhost/net.c | 4 ++-- kernel/locking/mcs_spinlock.h | 4 ++-- kernel/locking/mutex.c | 4 ++-- kernel/locking/osq_lock.c | 6 +++--- kernel/locking/qrwlock.c | 6 +++--- kernel/locking/rwsem-xadd.c | 4 ++-- lib/lockref.c | 2 +- 8 files changed, 16 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c index 8832f8e..383d134 100644 --- a/drivers/gpu/drm/i915/i915_gem_request.c +++ b/drivers/gpu/drm/i915/i915_gem_request.c @@ -723,7 +723,7 @@ bool __i915_spin_request(const struct drm_i915_gem_request *req, if (busywait_stop(timeout_us, cpu)) break; - cpu_relax_lowlatency(); + cpu_relax(); } while (!need_resched()); return false; diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 5dc128a..5dc3465 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -342,7 +342,7 @@ static int vhost_net_tx_get_vq_desc(struct vhost_net *net, endtime = busy_clock() + vq->busyloop_timeout; while (vhost_can_busy_poll(vq->dev, endtime) && vhost_vq_avail_empty(vq->dev, vq)) - cpu_relax_lowlatency(); + cpu_relax(); preempt_enable(); r = vhost_get_vq_desc(vq, vq->iov, ARRAY_SIZE(vq->iov), out_num, in_num, NULL, NULL); @@ -533,7 +533,7 @@ static int vhost_net_rx_peek_head_len(struct vhost_net *net, struct sock *sk) while (vhost_can_busy_poll(&net->dev, endtime) && !sk_has_rx_data(sk) && vhost_vq_avail_empty(&net->dev, vq)) - cpu_relax_lowlatency(); + cpu_relax(); preempt_enable(); diff --git a/kernel/locking/mcs_spinlock.h b/kernel/locking/mcs_spinlock.h index c835270..6a385aa 100644 --- a/kernel/locking/mcs_spinlock.h +++ b/kernel/locking/mcs_spinlock.h @@ -28,7 +28,7 @@ struct mcs_spinlock { #define arch_mcs_spin_lock_contended(l) \ do { \ while (!(smp_load_acquire(l))) \ - cpu_relax_lowlatency(); \ + cpu_relax(); \ } while (0) #endif @@ -108,7 +108,7 @@ void mcs_spin_unlock(struct mcs_spinlock **lock, struct mcs_spinlock *node) return; /* Wait until the next pointer is set */ while (!(next = READ_ONCE(node->next))) - cpu_relax_lowlatency(); + cpu_relax(); } /* Pass lock to next waiter. */ diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c index a70b90d..4463405 100644 --- a/kernel/locking/mutex.c +++ b/kernel/locking/mutex.c @@ -241,7 +241,7 @@ bool mutex_spin_on_owner(struct mutex *lock, struct task_struct *owner) break; } - cpu_relax_lowlatency(); + cpu_relax(); } rcu_read_unlock(); @@ -377,7 +377,7 @@ static bool mutex_optimistic_spin(struct mutex *lock, * memory barriers as we'll eventually observe the right * values at the cost of a few extra spins. */ - cpu_relax_lowlatency(); + cpu_relax(); } osq_unlock(&lock->osq); diff --git a/kernel/locking/osq_lock.c b/kernel/locking/osq_lock.c index 05a3785..4ea2710 100644 --- a/kernel/locking/osq_lock.c +++ b/kernel/locking/osq_lock.c @@ -75,7 +75,7 @@ osq_wait_next(struct optimistic_spin_queue *lock, break; } - cpu_relax_lowlatency(); + cpu_relax(); } return next; @@ -122,7 +122,7 @@ bool osq_lock(struct optimistic_spin_queue *lock) if (need_resched()) goto unqueue; - cpu_relax_lowlatency(); + cpu_relax(); } return true; @@ -148,7 +148,7 @@ bool osq_lock(struct optimistic_spin_queue *lock) if (smp_load_acquire(&node->locked)) return true; - cpu_relax_lowlatency(); + cpu_relax(); /* * Or we race against a concurrent unqueue()'s step-B, in which diff --git a/kernel/locking/qrwlock.c b/kernel/locking/qrwlock.c index 19248dd..cc3ed0c 100644 --- a/kernel/locking/qrwlock.c +++ b/kernel/locking/qrwlock.c @@ -54,7 +54,7 @@ static __always_inline void rspin_until_writer_unlock(struct qrwlock *lock, u32 cnts) { while ((cnts & _QW_WMASK) == _QW_LOCKED) { - cpu_relax_lowlatency(); + cpu_relax(); cnts = atomic_read_acquire(&lock->cnts); } } @@ -130,7 +130,7 @@ void queued_write_lock_slowpath(struct qrwlock *lock) (cmpxchg_relaxed(&l->wmode, 0, _QW_WAITING) == 0)) break; - cpu_relax_lowlatency(); + cpu_relax(); } /* When no more readers, set the locked flag */ @@ -141,7 +141,7 @@ void queued_write_lock_slowpath(struct qrwlock *lock) _QW_LOCKED) == _QW_WAITING)) break; - cpu_relax_lowlatency(); + cpu_relax(); } unlock: arch_spin_unlock(&lock->wait_lock); diff --git a/kernel/locking/rwsem-xadd.c b/kernel/locking/rwsem-xadd.c index 2337b4b..2fa2e2e6 100644 --- a/kernel/locking/rwsem-xadd.c +++ b/kernel/locking/rwsem-xadd.c @@ -368,7 +368,7 @@ static noinline bool rwsem_spin_on_owner(struct rw_semaphore *sem) return false; } - cpu_relax_lowlatency(); + cpu_relax(); } rcu_read_unlock(); out: @@ -423,7 +423,7 @@ static bool rwsem_optimistic_spin(struct rw_semaphore *sem) * memory barriers as we'll eventually observe the right * values at the cost of a few extra spins. */ - cpu_relax_lowlatency(); + cpu_relax(); } osq_unlock(&sem->osq); done: diff --git a/lib/lockref.c b/lib/lockref.c index 5a92189..c4bfcb8 100644 --- a/lib/lockref.c +++ b/lib/lockref.c @@ -20,7 +20,7 @@ if (likely(old.lock_count == prev.lock_count)) { \ SUCCESS; \ } \ - cpu_relax_lowlatency(); \ + cpu_relax(); \ } \ } while (0) -- 2.5.5 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christian Borntraeger Date: Tue, 25 Oct 2016 09:03:14 +0000 Subject: [GIT PULL v2 4/5] processor.h: Remove cpu_relax_lowlatency users Message-Id: <1477386195-32736-5-git-send-email-borntraeger@de.ibm.com> List-Id: References: <1477386195-32736-1-git-send-email-borntraeger@de.ibm.com> In-Reply-To: <1477386195-32736-1-git-send-email-borntraeger@de.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Peter Zijlstra Cc: linux-arch@vger.kernel.org, linux-s390 , kvm@vger.kernel.org, Will Deacon , x86@kernel.org, Heiko Carstens , linux-kernel@vger.kernel.org, Nicholas Piggin , Russell King , sparclinux@vger.kernel.org, Noam Camus , Catalin Marinas , Martin Schwidefsky , xen-devel@lists.xenproject.org, virtualization@lists.linux-foundation.org, linuxppc-dev@lists.ozlabs.org, Ingo Molnar With the s390 special case of a yielding cpu_relax implementation gone, we can now remove all users of cpu_relax_lowlatency and replace them with cpu_relax. Signed-off-by: Christian Borntraeger --- drivers/gpu/drm/i915/i915_gem_request.c | 2 +- drivers/vhost/net.c | 4 ++-- kernel/locking/mcs_spinlock.h | 4 ++-- kernel/locking/mutex.c | 4 ++-- kernel/locking/osq_lock.c | 6 +++--- kernel/locking/qrwlock.c | 6 +++--- kernel/locking/rwsem-xadd.c | 4 ++-- lib/lockref.c | 2 +- 8 files changed, 16 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c index 8832f8e..383d134 100644 --- a/drivers/gpu/drm/i915/i915_gem_request.c +++ b/drivers/gpu/drm/i915/i915_gem_request.c @@ -723,7 +723,7 @@ bool __i915_spin_request(const struct drm_i915_gem_request *req, if (busywait_stop(timeout_us, cpu)) break; - cpu_relax_lowlatency(); + cpu_relax(); } while (!need_resched()); return false; diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 5dc128a..5dc3465 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -342,7 +342,7 @@ static int vhost_net_tx_get_vq_desc(struct vhost_net *net, endtime = busy_clock() + vq->busyloop_timeout; while (vhost_can_busy_poll(vq->dev, endtime) && vhost_vq_avail_empty(vq->dev, vq)) - cpu_relax_lowlatency(); + cpu_relax(); preempt_enable(); r = vhost_get_vq_desc(vq, vq->iov, ARRAY_SIZE(vq->iov), out_num, in_num, NULL, NULL); @@ -533,7 +533,7 @@ static int vhost_net_rx_peek_head_len(struct vhost_net *net, struct sock *sk) while (vhost_can_busy_poll(&net->dev, endtime) && !sk_has_rx_data(sk) && vhost_vq_avail_empty(&net->dev, vq)) - cpu_relax_lowlatency(); + cpu_relax(); preempt_enable(); diff --git a/kernel/locking/mcs_spinlock.h b/kernel/locking/mcs_spinlock.h index c835270..6a385aa 100644 --- a/kernel/locking/mcs_spinlock.h +++ b/kernel/locking/mcs_spinlock.h @@ -28,7 +28,7 @@ struct mcs_spinlock { #define arch_mcs_spin_lock_contended(l) \ do { \ while (!(smp_load_acquire(l))) \ - cpu_relax_lowlatency(); \ + cpu_relax(); \ } while (0) #endif @@ -108,7 +108,7 @@ void mcs_spin_unlock(struct mcs_spinlock **lock, struct mcs_spinlock *node) return; /* Wait until the next pointer is set */ while (!(next = READ_ONCE(node->next))) - cpu_relax_lowlatency(); + cpu_relax(); } /* Pass lock to next waiter. */ diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c index a70b90d..4463405 100644 --- a/kernel/locking/mutex.c +++ b/kernel/locking/mutex.c @@ -241,7 +241,7 @@ bool mutex_spin_on_owner(struct mutex *lock, struct task_struct *owner) break; } - cpu_relax_lowlatency(); + cpu_relax(); } rcu_read_unlock(); @@ -377,7 +377,7 @@ static bool mutex_optimistic_spin(struct mutex *lock, * memory barriers as we'll eventually observe the right * values at the cost of a few extra spins. */ - cpu_relax_lowlatency(); + cpu_relax(); } osq_unlock(&lock->osq); diff --git a/kernel/locking/osq_lock.c b/kernel/locking/osq_lock.c index 05a3785..4ea2710 100644 --- a/kernel/locking/osq_lock.c +++ b/kernel/locking/osq_lock.c @@ -75,7 +75,7 @@ osq_wait_next(struct optimistic_spin_queue *lock, break; } - cpu_relax_lowlatency(); + cpu_relax(); } return next; @@ -122,7 +122,7 @@ bool osq_lock(struct optimistic_spin_queue *lock) if (need_resched()) goto unqueue; - cpu_relax_lowlatency(); + cpu_relax(); } return true; @@ -148,7 +148,7 @@ bool osq_lock(struct optimistic_spin_queue *lock) if (smp_load_acquire(&node->locked)) return true; - cpu_relax_lowlatency(); + cpu_relax(); /* * Or we race against a concurrent unqueue()'s step-B, in which diff --git a/kernel/locking/qrwlock.c b/kernel/locking/qrwlock.c index 19248dd..cc3ed0c 100644 --- a/kernel/locking/qrwlock.c +++ b/kernel/locking/qrwlock.c @@ -54,7 +54,7 @@ static __always_inline void rspin_until_writer_unlock(struct qrwlock *lock, u32 cnts) { while ((cnts & _QW_WMASK) = _QW_LOCKED) { - cpu_relax_lowlatency(); + cpu_relax(); cnts = atomic_read_acquire(&lock->cnts); } } @@ -130,7 +130,7 @@ void queued_write_lock_slowpath(struct qrwlock *lock) (cmpxchg_relaxed(&l->wmode, 0, _QW_WAITING) = 0)) break; - cpu_relax_lowlatency(); + cpu_relax(); } /* When no more readers, set the locked flag */ @@ -141,7 +141,7 @@ void queued_write_lock_slowpath(struct qrwlock *lock) _QW_LOCKED) = _QW_WAITING)) break; - cpu_relax_lowlatency(); + cpu_relax(); } unlock: arch_spin_unlock(&lock->wait_lock); diff --git a/kernel/locking/rwsem-xadd.c b/kernel/locking/rwsem-xadd.c index 2337b4b..2fa2e2e6 100644 --- a/kernel/locking/rwsem-xadd.c +++ b/kernel/locking/rwsem-xadd.c @@ -368,7 +368,7 @@ static noinline bool rwsem_spin_on_owner(struct rw_semaphore *sem) return false; } - cpu_relax_lowlatency(); + cpu_relax(); } rcu_read_unlock(); out: @@ -423,7 +423,7 @@ static bool rwsem_optimistic_spin(struct rw_semaphore *sem) * memory barriers as we'll eventually observe the right * values at the cost of a few extra spins. */ - cpu_relax_lowlatency(); + cpu_relax(); } osq_unlock(&sem->osq); done: diff --git a/lib/lockref.c b/lib/lockref.c index 5a92189..c4bfcb8 100644 --- a/lib/lockref.c +++ b/lib/lockref.c @@ -20,7 +20,7 @@ if (likely(old.lock_count = prev.lock_count)) { \ SUCCESS; \ } \ - cpu_relax_lowlatency(); \ + cpu_relax(); \ } \ } while (0) -- 2.5.5