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author | Will Deacon <will.deacon@arm.com> | 2013-10-09 15:54:26 +0100 |
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committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-10-24 15:46:33 +0100 |
commit | 52ea2a560a9dba57fe5fd6b4726b1089751accf2 (patch) | |
tree | 5cd58ed43397b9f52fa3d63a11bc272f3a834967 /arch/arm64/include/asm/spinlock_types.h | |
parent | e29a074b44a9110c567fc31cdb12928f8eca7c79 (diff) | |
download | op-kernel-dev-52ea2a560a9dba57fe5fd6b4726b1089751accf2.zip op-kernel-dev-52ea2a560a9dba57fe5fd6b4726b1089751accf2.tar.gz |
arm64: locks: introduce ticket-based spinlock implementation
This patch introduces a ticket lock implementation for arm64, along the
same lines as the implementation for arch/arm/.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/spinlock_types.h')
-rw-r--r-- | arch/arm64/include/asm/spinlock_types.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/arm64/include/asm/spinlock_types.h b/arch/arm64/include/asm/spinlock_types.h index 9a49434..8769275 100644 --- a/arch/arm64/include/asm/spinlock_types.h +++ b/arch/arm64/include/asm/spinlock_types.h @@ -20,14 +20,14 @@ # error "please don't include this file directly" #endif -/* We only require natural alignment for exclusive accesses. */ -#define __lock_aligned +#define TICKET_SHIFT 16 typedef struct { - volatile unsigned int lock; -} arch_spinlock_t; + u16 owner; + u16 next; +} __aligned(4) arch_spinlock_t; -#define __ARCH_SPIN_LOCK_UNLOCKED { 0 } +#define __ARCH_SPIN_LOCK_UNLOCKED { 0 , 0 } typedef struct { volatile unsigned int lock; |