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This patch adds two new LWS routines - lws_atomic_xchg and lws_atomic_store.
These are simpler than the CAS routines. Currently, we use the CAS
routines for atomic stores. This is inefficient since it requires
both winning the spinlock and a successful CAS operation.
Change has been tested on c8000 and rp3440.
In v2, I moved the code to disble/enable page faults inside the spinlocks.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
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