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If the host wants a consistent view (*if* it wants it), it can wait for the sequence number to be even, read the lot and then check it did not change. If it is odd, it means the structure is being modified. If it changed after reading it means a new modification started. Not my invention: it's old stuff, though smart. See sequential locks in the kernel for example. Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
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