The idea is nice, but I don't like the API. The "_overflow" feels too
specific because maybe we could check for other things in the future.
Normally boolean macros should say they are boolean in the name and I
would prefer if it returned zero on failure.
if (!checked_shift(dest, mask, shift)) {
if (!shift_ok(dest, mask, shift)) {
if (!safe_shift(dest, mask, shift)) {
regards,
dan carpenter
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