Messages in this thread Patch in this message | | | Subject | [PATCH v7 6/6] MCS Lock: add Kconfig entries to allow arch-specific hooks | From | Tim Chen <> | Date | Thu, 16 Jan 2014 16:08:36 -0800 |
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This patch adds Kconfig entries to allow architectures to hook into the MCS lock/unlock functions in the contended case.
From: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> --- arch/Kconfig | 3 +++ include/linux/mcs_spinlock.h | 8 ++++++++ 2 files changed, 11 insertions(+)
diff --git a/arch/Kconfig b/arch/Kconfig index 80bbb8c..8a2a056 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -303,6 +303,9 @@ config HAVE_CMPXCHG_LOCAL config HAVE_CMPXCHG_DOUBLE bool +config HAVE_ARCH_MCS_LOCK + bool + config ARCH_WANT_IPC_PARSE_VERSION bool diff --git a/include/linux/mcs_spinlock.h b/include/linux/mcs_spinlock.h index d54bb23..d2c02ad 100644 --- a/include/linux/mcs_spinlock.h +++ b/include/linux/mcs_spinlock.h @@ -12,6 +12,14 @@ #ifndef __LINUX_MCS_SPINLOCK_H #define __LINUX_MCS_SPINLOCK_H +/* + * An architecture may provide its own lock/unlock functions for the + * contended case. + */ +#ifdef CONFIG_HAVE_ARCH_MCS_LOCK +#include <asm/mcs_spinlock.h> +#endif + struct mcs_spinlock { struct mcs_spinlock *next; int locked; /* 1 if lock acquired */ -- 1.7.11.7
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