diff options
Diffstat (limited to 'qemu-queue.h')
| -rw-r--r-- | qemu-queue.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/qemu-queue.h b/qemu-queue.h index 1d077458ce..22142305a6 100644 --- a/qemu-queue.h +++ b/qemu-queue.h @@ -76,6 +76,8 @@ * For details on the use of these macros, see the queue(3) manual page. */ +#include "qemu-barrier.h" /* for smp_wmb() */ + /* * List definitions. */ @@ -122,6 +124,17 @@ struct { \ (elm)->field.le_prev = &(head)->lh_first; \ } while (/*CONSTCOND*/0) +#define QLIST_INSERT_HEAD_RCU(head, elm, field) do { \ + (elm)->field.le_prev = &(head)->lh_first; \ + (elm)->field.le_next = (head)->lh_first; \ + smp_wmb(); /* fill elm before linking it */ \ + if ((head)->lh_first != NULL) { \ + (head)->lh_first->field.le_prev = &(elm)->field.le_next; \ + } \ + (head)->lh_first = (elm); \ + smp_wmb(); \ +} while (/* CONSTCOND*/0) + #define QLIST_REMOVE(elm, field) do { \ if ((elm)->field.le_next != NULL) \ (elm)->field.le_next->field.le_prev = \ |