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arch/sparc: Enable queued rwlocks for SPARC

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Enable queued rwlocks for SPARC. Here are the discussions on this feature
when this was introduced.
https://lwn.net/Articles/572765/
https://lwn.net/Articles/582200/

Cleaned-up the arch_read_xxx and arch_write_xxx definitions in spinlock_64.h.
These routines are replaced by the functions in include/asm-generic/qrwlock.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 17:55:13 -06:00
committed by David S. Miller
parent a12ee23493
commit a37594f198
4 changed files with 13 additions and 124 deletions
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7
arch/sparc/include/asm/qrwlock.h Normal file
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@@ -0,0 +1,7 @@
#ifndef _ASM_SPARC_QRWLOCK_H
#define _ASM_SPARC_QRWLOCK_H
#include <asm-generic/qrwlock_types.h>
#include <asm-generic/qrwlock.h>
#endif /* _ASM_SPARC_QRWLOCK_H */