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SubjectRe: [PATCH v3 0/5] Switch arm64 over to qrwlock
Ingo, Peter,

Would you be willing to merge this via -tip, please? I'm happy to
rebase/repost as required, but the code is in good shape now.

Will

On Thu, Oct 19, 2017 at 05:53:32PM +0100, Will Deacon wrote:
> On Thu, Oct 12, 2017 at 01:20:46PM +0100, Will Deacon wrote:
> > This is version three of the patches previously posted here:
> >
> > v1: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-October/534666.html
> > v2: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-October/534981.html
> >
> > Changes since v2 include:
> >
> > * Drop unused cnt argument
> > * Fix typo in UNLOCK Kconfig inlining options
> > * Added Tested-by tags
> >
> > Thanks to all of those who provided review and testing feedback!
>
> I've not had any more feedback on this and the testing results are very
> encouraging so I'd like to merge it for 4.15. However, it might make more
> sense for the whole thing to go via -tip instead.
>
> Ingo, Peter: what do you prefer?
>
> Will
>
> > Will Deacon (5):
> > kernel/locking: Use struct qrwlock instead of struct __qrwlock
> > locking/atomic: Add atomic_cond_read_acquire
> > kernel/locking: Use atomic_cond_read_acquire when spinning in qrwlock
> > arm64: locking: Move rwlock implementation over to qrwlocks
> > kernel/locking: 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(-)
> >
> > --
> > 2.1.4
> >

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