instead of accessing tqe_prev field dircetly outside of queue.h use macros to check if element is in list and make sure that afer element is removed from list tqe_prev field could be used to do the same check.
Signed-off-by: Igor Mammedov <imamm...@redhat.com> --- The patch is split from as cleanup is not urgent [PATCH 0/6] Fix migration issues with arbitrary cpu-hot(un)plug and made on top of [PATCH v2 0/6] Fix migration issues with arbitrary cpu-hot(un)plug posting it to list so that it won't be forgotten or lost and affected people could review it at there leisure time. --- include/qemu/queue.h | 2 ++ blockdev.c | 2 +- exec.c | 3 +-- net/filter.c | 2 +- 4 files changed, 5 insertions(+), 4 deletions(-) diff --git a/include/qemu/queue.h b/include/qemu/queue.h index c2b6c81..342073f 100644 --- a/include/qemu/queue.h +++ b/include/qemu/queue.h @@ -407,6 +407,7 @@ struct { \ else \ (head)->tqh_last = (elm)->field.tqe_prev; \ *(elm)->field.tqe_prev = (elm)->field.tqe_next; \ + (elm)->field.tqe_prev = NULL; \ } while (/*CONSTCOND*/0) #define QTAILQ_FOREACH(var, head, field) \ @@ -430,6 +431,7 @@ struct { \ #define QTAILQ_EMPTY(head) ((head)->tqh_first == NULL) #define QTAILQ_FIRST(head) ((head)->tqh_first) #define QTAILQ_NEXT(elm, field) ((elm)->field.tqe_next) +#define QTAILQ_IN_USE(elm, field) ((elm)->field.tqe_prev != NULL) #define QTAILQ_LAST(head, headname) \ (*(((struct headname *)((head)->tqh_last))->tqh_last)) diff --git a/blockdev.c b/blockdev.c index eafeba9..0b73158 100644 --- a/blockdev.c +++ b/blockdev.c @@ -4031,7 +4031,7 @@ void qmp_x_blockdev_del(bool has_id, const char *id, goto out; } - if (!blk && !bs->monitor_list.tqe_prev) { + if (!blk && !QTAILQ_IN_USE(bs, monitor_list)) { error_setg(errp, "Node %s is not owned by the monitor", bs->node_name); goto out; diff --git a/exec.c b/exec.c index 50e3ee2..8e8416b 100644 --- a/exec.c +++ b/exec.c @@ -614,14 +614,13 @@ void cpu_exec_exit(CPUState *cpu) CPUClass *cc = CPU_GET_CLASS(cpu); cpu_list_lock(); - if (cpu->node.tqe_prev == NULL) { + if (!QTAILQ_IN_USE(cpu, node)) { /* there is nothing to undo since cpu_exec_init() hasn't been called */ cpu_list_unlock(); return; } QTAILQ_REMOVE(&cpus, cpu, node); - cpu->node.tqe_prev = NULL; cpu->cpu_index = UNASSIGNED_CPU_INDEX; cpu_list_unlock(); diff --git a/net/filter.c b/net/filter.c index 888fe6d..1dfd2ca 100644 --- a/net/filter.c +++ b/net/filter.c @@ -239,7 +239,7 @@ static void netfilter_finalize(Object *obj) } if (nf->netdev && !QTAILQ_EMPTY(&nf->netdev->filters) && - nf->next.tqe_prev) { + QTAILQ_IN_USE(nf, next)) { QTAILQ_REMOVE(&nf->netdev->filters, nf, next); } g_free(nf->netdev_id); -- 2.7.4