diff options
| author | Babu Moger <babu.moger@oracle.com> | 2017-05-24 17:55:15 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-05-25 12:06:52 -0700 |
| commit | 145d978585977438ebb55079487827006c604e39 (patch) | |
| tree | 8c2db73ea429d948a46c6b8577ce6c40a3fd18bd /arch/sparc/include/asm/spinlock_types.h | |
| parent | 79d39e2bab60d18a68a5abc00be4506864397efc (diff) | |
arch/sparc: Enable queued spinlock support for SPARC
This patch makes the necessary changes in SPARC architecture to enable
queued spinlock support. Here are some of the earlier discussions about
this feature.
https://lwn.net/Articles/561775/
https://lwn.net/Articles/590243/
Cleaned-up the spinlock_64.h. The definitions of arch_spin_xxx are
replaced by the function in <asm-generic/qspinlock.h>
Signed-off-by: Babu Moger <babu.moger@oracle.com>
Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com>
Reviewed-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Reviewed-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include/asm/spinlock_types.h')
| -rw-r--r-- | arch/sparc/include/asm/spinlock_types.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/spinlock_types.h b/arch/sparc/include/asm/spinlock_types.h index 64fce21b23df..bce8ef44dfa9 100644 --- a/arch/sparc/include/asm/spinlock_types.h +++ b/arch/sparc/include/asm/spinlock_types.h @@ -1,11 +1,16 @@ #ifndef __SPARC_SPINLOCK_TYPES_H #define __SPARC_SPINLOCK_TYPES_H +#ifdef CONFIG_QUEUED_SPINLOCKS +#include <asm-generic/qspinlock_types.h> +#else + typedef struct { volatile unsigned char lock; } arch_spinlock_t; #define __ARCH_SPIN_LOCK_UNLOCKED { 0 } +#endif /* CONFIG_QUEUED_SPINLOCKS */ #ifdef CONFIG_QUEUED_RWLOCKS #include <asm-generic/qrwlock_types.h> |