Paul Mackerras wrote:
David Howells writes:
+ The way to deal with this is to insert an I/O memory barrier between the
+ two accesses:
+
+ *ADR = ctl_reg_3;
+ mb();
+ reg = *DATA;
Ummm, this implies mb() is "an I/O memory barrier". I can see people
getting confused if they read this and then see mb() being used when
no I/O is being done.
Isn't it? Why wouldn't you just use smp_mb() if no IO is being done?
--
SUSE Labs, Novell Inc.
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