From: Waiman Long <Waiman.Long@hp.com> To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>, Arnd Bergmann <arnd@arndb.de> Cc: Waiman Long <Waiman.Long@hp.com>, linux-arch@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>, Steven Rostedt <rostedt@goodmis.org>, Andrew Morton <akpm@linux-foundation.org>, Richard Weinberger <richard@nod.at>, Catalin Marinas <catalin.marinas@arm.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Matt Fleming <matt.fleming@intel.com>, Herbert Xu <herbert@gondor.hengli.com.au>, Akinobu Mita <akinobu.mita@gmail.com>, Rusty Russell <rusty@rustcorp.com.au>, Michel Lespinasse <walken@google.com>, Andi Kleen <andi@firstfloor.org>, Rik van Riel <riel@redhat.com>, "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>, Linus Torvalds <torvalds@linux-foundation.org>, "Chandramouleeswaran, Aswin" <aswin@hp.com>, "Norton, Scott J" <scott.norton@hp.com> Subject: [PATCH RFC 2/2] x86 qrwlock: Enable x86 to use queue read/write lock Date: Fri, 12 Jul 2013 21:34:09 -0400 [thread overview] Message-ID: <1373679249-27123-3-git-send-email-Waiman.Long@hp.com> (raw) In-Reply-To: <1373679249-27123-1-git-send-email-Waiman.Long@hp.com> This patch makes the necessary changes at the x86 architecture specific layer to enable the presence of the CONFIG_QUEUE_RWLOCK kernel option to replace the plain read/write lock by the queue read/write lock. Signed-off-by: Waiman Long <Waiman.Long@hp.com> --- arch/x86/Kconfig | 3 +++ arch/x86/include/asm/spinlock.h | 2 ++ arch/x86/include/asm/spinlock_types.h | 4 ++++ 3 files changed, 9 insertions(+), 0 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index b32ebf9..638dbaa 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2344,6 +2344,9 @@ config X86_DMA_REMAP bool depends on STA2X11 +config ARCH_QUEUE_RWLOCK + def_bool y + source "net/Kconfig" source "drivers/Kconfig" diff --git a/arch/x86/include/asm/spinlock.h b/arch/x86/include/asm/spinlock.h index 33692ea..613a4ff 100644 --- a/arch/x86/include/asm/spinlock.h +++ b/arch/x86/include/asm/spinlock.h @@ -137,6 +137,7 @@ static inline void arch_spin_unlock_wait(arch_spinlock_t *lock) cpu_relax(); } +#ifndef CONFIG_QUEUE_RWLOCK /* * Read-write spinlocks, allowing multiple readers * but only one writer. @@ -219,6 +220,7 @@ static inline void arch_write_unlock(arch_rwlock_t *rw) asm volatile(LOCK_PREFIX WRITE_LOCK_ADD(%1) "%0" : "+m" (rw->write) : "i" (RW_LOCK_BIAS) : "memory"); } +#endif /* CONFIG_QUEUE_RWLOCK */ #define arch_read_lock_flags(lock, flags) arch_read_lock(lock) #define arch_write_lock_flags(lock, flags) arch_write_lock(lock) diff --git a/arch/x86/include/asm/spinlock_types.h b/arch/x86/include/asm/spinlock_types.h index ad0ad07..afacd36 100644 --- a/arch/x86/include/asm/spinlock_types.h +++ b/arch/x86/include/asm/spinlock_types.h @@ -28,6 +28,10 @@ typedef struct arch_spinlock { #define __ARCH_SPIN_LOCK_UNLOCKED { { 0 } } +#ifdef CONFIG_QUEUE_RWLOCK +#include <asm-generic/qrwlock.h> +#else #include <asm/rwlock.h> +#endif #endif /* _ASM_X86_SPINLOCK_TYPES_H */ -- 1.7.1
WARNING: multiple messages have this Message-ID (diff)
From: Waiman Long <Waiman.Long@hp.com> To: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>, Arnd Bergmann <arnd@arndb.de> Cc: Waiman Long <Waiman.Long@hp.com>, linux-arch@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>, Steven Rostedt <rostedt@goodmis.org>, Andrew Morton <akpm@linux-foundation.org>, Richard Weinberger <richard@nod.at>, Catalin Marinas <catalin.marinas@arm.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Matt Fleming <matt.fleming@intel.com>, Herbert Xu <herbert@gondor.apana.org.au>, Akinobu Mita <akinobu.mita@gmail.com>, Rusty Russell <rusty@rustcorp.com.au>, Michel Lespinasse <walken@google.com>, Andi Kleen <andi@firstfloor.org>, Rik van Riel <riel@redhat.com>, "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>, Linus Torvalds <torvalds@linux-foundation.org>, "Chandramouleeswaran, Aswin" <aswin@hp.com>, "Norton, Scott J" <scott.norton@hp.com> Subject: [PATCH RFC 2/2] x86 qrwlock: Enable x86 to use queue read/write lock Date: Fri, 12 Jul 2013 21:34:09 -0400 [thread overview] Message-ID: <1373679249-27123-3-git-send-email-Waiman.Long@hp.com> (raw) In-Reply-To: <1373679249-27123-1-git-send-email-Waiman.Long@hp.com> This patch makes the necessary changes at the x86 architecture specific layer to enable the presence of the CONFIG_QUEUE_RWLOCK kernel option to replace the plain read/write lock by the queue read/write lock. Signed-off-by: Waiman Long <Waiman.Long@hp.com> --- arch/x86/Kconfig | 3 +++ arch/x86/include/asm/spinlock.h | 2 ++ arch/x86/include/asm/spinlock_types.h | 4 ++++ 3 files changed, 9 insertions(+), 0 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index b32ebf9..638dbaa 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2344,6 +2344,9 @@ config X86_DMA_REMAP bool depends on STA2X11 +config ARCH_QUEUE_RWLOCK + def_bool y + source "net/Kconfig" source "drivers/Kconfig" diff --git a/arch/x86/include/asm/spinlock.h b/arch/x86/include/asm/spinlock.h index 33692ea..613a4ff 100644 --- a/arch/x86/include/asm/spinlock.h +++ b/arch/x86/include/asm/spinlock.h @@ -137,6 +137,7 @@ static inline void arch_spin_unlock_wait(arch_spinlock_t *lock) cpu_relax(); } +#ifndef CONFIG_QUEUE_RWLOCK /* * Read-write spinlocks, allowing multiple readers * but only one writer. @@ -219,6 +220,7 @@ static inline void arch_write_unlock(arch_rwlock_t *rw) asm volatile(LOCK_PREFIX WRITE_LOCK_ADD(%1) "%0" : "+m" (rw->write) : "i" (RW_LOCK_BIAS) : "memory"); } +#endif /* CONFIG_QUEUE_RWLOCK */ #define arch_read_lock_flags(lock, flags) arch_read_lock(lock) #define arch_write_lock_flags(lock, flags) arch_write_lock(lock) diff --git a/arch/x86/include/asm/spinlock_types.h b/arch/x86/include/asm/spinlock_types.h index ad0ad07..afacd36 100644 --- a/arch/x86/include/asm/spinlock_types.h +++ b/arch/x86/include/asm/spinlock_types.h @@ -28,6 +28,10 @@ typedef struct arch_spinlock { #define __ARCH_SPIN_LOCK_UNLOCKED { { 0 } } +#ifdef CONFIG_QUEUE_RWLOCK +#include <asm-generic/qrwlock.h> +#else #include <asm/rwlock.h> +#endif #endif /* _ASM_X86_SPINLOCK_TYPES_H */ -- 1.7.1
next prev parent reply other threads:[~2013-07-13 1:34 UTC|newest] Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-07-13 1:34 [PATCH RFC 0/2] qrwlock: Introducing a queue read/write lock implementation Waiman Long 2013-07-13 1:34 ` Waiman Long 2013-07-13 1:34 ` [PATCH RFC 1/2] qrwlock: A " Waiman Long 2013-07-13 1:34 ` Waiman Long 2013-07-15 14:39 ` Steven Rostedt 2013-07-15 14:39 ` Steven Rostedt 2013-07-15 20:44 ` Waiman Long 2013-07-15 20:44 ` Waiman Long 2013-07-15 22:31 ` Thomas Gleixner 2013-07-15 22:31 ` Thomas Gleixner 2013-07-16 1:19 ` Waiman Long 2013-07-16 1:19 ` Waiman Long 2013-07-18 7:42 ` Ingo Molnar 2013-07-18 7:42 ` Ingo Molnar 2013-07-18 7:42 ` Ingo Molnar 2013-07-18 13:40 ` Waiman Long 2013-07-18 13:40 ` Waiman Long 2013-07-18 13:40 ` Waiman Long 2013-07-19 8:40 ` Ingo Molnar 2013-07-19 8:40 ` Ingo Molnar 2013-07-19 8:40 ` Ingo Molnar 2013-07-19 15:30 ` Waiman Long 2013-07-19 15:30 ` Waiman Long 2013-07-19 15:30 ` Waiman Long 2013-07-22 10:34 ` Ingo Molnar 2013-07-22 10:34 ` Ingo Molnar 2013-07-22 10:34 ` Ingo Molnar 2013-07-24 0:03 ` Waiman Long 2013-07-24 0:03 ` Waiman Long 2013-07-24 0:03 ` Waiman Long 2013-07-18 10:22 ` Thomas Gleixner 2013-07-18 10:22 ` Thomas Gleixner 2013-07-18 14:19 ` Waiman Long 2013-07-18 14:19 ` Waiman Long 2013-07-21 5:42 ` Raghavendra K T 2013-07-21 5:42 ` Raghavendra K T 2013-07-21 5:42 ` Raghavendra K T 2013-07-23 23:54 ` Waiman Long 2013-07-23 23:54 ` Waiman Long 2013-07-23 23:54 ` Waiman Long 2013-07-13 1:34 ` Waiman Long [this message] 2013-07-13 1:34 ` [PATCH RFC 2/2] x86 qrwlock: Enable x86 to use queue read/write lock Waiman Long
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