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copy: safeguard against strange compiler warnings

This commit is contained in:
Thomas Schoebel-Theuer 2022-07-21 12:35:09 +02:00
parent 0213d4d461
commit f92a44ecfa
1 changed files with 16 additions and 0 deletions
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16
kernel/mars_copy.c
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@ -524,7 +524,9 @@ restart:
_clear_mref(brick, index, 0);
next_state = COPY_STATE_START;
/* fallthrough */
goto label_COPY_STATE_START;
case COPY_STATE_START:
label_COPY_STATE_START:
/* This is the relgular starting state.
* It must be zero, automatically entered via memset()
*/
@ -561,7 +563,9 @@ restart:
next_state = COPY_STATE_START2;
/* fallthrough */
goto label_COPY_STATE_START2;
case COPY_STATE_START2:
label_COPY_STATE_START2:
status = _make_mref(brick, index, 1, NULL,
pos, brick->copy_end,
_make_flags(true, true));
@ -572,15 +576,19 @@ restart:
}
next_state = COPY_STATE_READ2;
/* fallthrough */
goto label_COPY_STATE_READ2;
case COPY_STATE_READ2:
label_COPY_STATE_READ2:
if (READ_ONCE(st->active[1])) {
/* idempotence: wait by unchanged state */
goto idle;
}
/* wait for both mrefs to appear */
/* fallthrough */
goto label_COPY_STATE_READ3;
case COPY_STATE_READ1:
case COPY_STATE_READ3:
label_COPY_STATE_READ3:
if (READ_ONCE(st->active[0])) {
/* idempotence: wait by unchanged state */
goto idle;
@ -644,7 +652,9 @@ restart:
}
next_state = COPY_STATE_WRITE;
/* fallthrough */
goto label_COPY_STATE_WRITE;
case COPY_STATE_WRITE:
label_COPY_STATE_WRITE:
if (is_write_limited(brick))
goto idle;
/* Obey ordering to get a strict "append" behaviour.
@ -703,7 +713,9 @@ restart:
st->writeout = true;
next_state = COPY_STATE_WRITTEN;
/* fallthrough */
goto label_COPY_STATE_WRITTEN;
case COPY_STATE_WRITTEN:
label_COPY_STATE_WRITTEN:
if (READ_ONCE(st->active[1])) {
/* idempotence: wait by unchanged state */
MARS_IO("irrelevant\n");
@ -721,12 +733,16 @@ restart:
}
next_state = COPY_STATE_CLEANUP;
/* fallthrough */
goto label_COPY_STATE_CLEANUP;
case COPY_STATE_CLEANUP:
label_COPY_STATE_CLEANUP:
_clear_mref(brick, index, 1);
_clear_mref(brick, index, 0);
next_state = COPY_STATE_FINISHED;
/* fallthrough */
goto label_COPY_STATE_FINISHED;
case COPY_STATE_FINISHED:
label_COPY_STATE_FINISHED:
/* Indicate successful completion by remaining in this state.
* Restart of the finite automaton must be done externally.
*/