| From: |
| Sebastian Andrzej Siewior <sebastian-AT-breakpoint.cc> |
| To: |
| linux-arm-kernel-AT-lists.infradead.org |
| Subject: |
| [RFC PATCH 0/6 v2] Queued spinlocks/RW-locks for ARM |
| Date: |
| Mon, 14 Oct 2019 00:13:04 +0200 |
| Message-ID: |
| <20191013221310.30748-1-sebastian@breakpoint.cc> |
| Cc: |
| Arnd Bergmann <arnd-AT-arndb.de>, Peter Zijlstra <peterz-AT-infradead.org>, Russell King <linux-AT-armlinux.org.uk>, Ingo Molnar <mingo-AT-redhat.com>, Waiman Long <longman-AT-redhat.com>, Will Deacon <will-AT-kernel.org> |
| Archive-link: |
| Article |
I added support for queued-RW and -spinlocks for ARM. I followed Arnd's
suggestion and added support for xchg() on 8bit and 16bit variables (V6
CPUs) via the SH implementation. This makes it possible to remove the
current ticket based locking implementation.
The numbers should be the same as in v1 posted here:
http://lkml.kernel.org/r/20191007214439.27891-1-sebastian...
The only thing changed is that patch #1-#3 wire up the missing xchg and
the patches #4 and #5 additionally remove the old implementation while
adding the missing bits for the queued implementation.
Sebatian
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