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arch/sparc: Enable queued spinlock support for SPARC

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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>
This commit is contained in:
Babu Moger
2017-05-24 17:55:15 -06:00
committed by David S. Miller
parent 79d39e2bab
commit 145d978585
4 changed files with 14 additions and 83 deletions
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7
arch/sparc/include/asm/qspinlock.h Normal file
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#ifndef _ASM_SPARC_QSPINLOCK_H
#define _ASM_SPARC_QSPINLOCK_H
#include <asm-generic/qspinlock_types.h>
#include <asm-generic/qspinlock.h>
#endif /* _ASM_SPARC_QSPINLOCK_H */