APPLIED: [PATCH 0/5][Bionic][SRU Artful] Switch arm64 over to qrwlock

[Khaled Elmously]

Applied to Artful

On 2018-01-04 18:48:32 , dann frazier wrote:
> BugLink: http://bugs.launchpad.net/bugs/1732238
> 
> These patches comprise all clean cherry picks that landed in the 4.15
> merge window. Verified on a ThunderX2-based Sabre board, and regression
> tested on a 128-cpu x86 system using stress-ng and locktorture. (The other
> Ubuntu architectures don't use qrwlocks).
> 
> Will Deacon (5):
>   locking/qrwlock: Use 'struct qrwlock' instead of 'struct __qrwlock'
>   locking/atomic: Add atomic_cond_read_acquire()
>   locking/qrwlock: Use atomic_cond_read_acquire() when spinning in
>     qrwlock
>   locking/qrwlock, arm64: Move rwlock implementation over to qrwlocks
>   locking/qrwlock: Prevent slowpath writers getting held up by fastpath
> 
>  arch/arm64/Kconfig                      |  17 ++++
>  arch/arm64/include/asm/Kbuild           |   1 +
>  arch/arm64/include/asm/spinlock.h       | 164 +-------------------------------
>  arch/arm64/include/asm/spinlock_types.h |   6 +-
>  include/asm-generic/atomic-long.h       |   3 +
>  include/asm-generic/qrwlock.h           |  37 ++-----
>  include/asm-generic/qrwlock_types.h     |  15 ++-
>  include/linux/atomic.h                  |   4 +
>  kernel/locking/qrwlock.c                |  86 +++--------------
>  9 files changed, 61 insertions(+), 272 deletions(-)
> 
> -- 
> 2.15.1
> 
> 
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