CVS commit: src/sys/arch/alpha/alpha

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Sun Feb 27 14:17:10 UTC 2022

Modified Files:
        src/sys/arch/alpha/alpha: cpu.c

Log Message:
alpha: Fix placement of membar for sending ICCB message.

While here, reduce it to membar_exit -- it's obviously not needed for
store-before-load here (although alpha doesn't have anything weaker
than the full sequential consistency `mb'), and although we do need a
store-before-load (and load-before-load) to spin waiting for the CPU
to wake up, that already happens a few lines below with alpha_mb in
the loop anyway.  So no need for membar_sync, which is just `mb'
under the hood -- deleting the membar_sync in this place can't hurt.

The membar_sync had been inserted automatically when converting from
an older style of atomic_ops(3) API.


To generate a diff of this commit:
cvs rdiff -u -r1.104 -r1.105 src/sys/arch/alpha/alpha/cpu.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.