X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fdsl_synctask.c;h=977702912b659633505d488fb83760464c798dbd;hb=47050a88ac1445f3557030d0d7e61b8a397a5476;hp=832685b0fcf18938c1e3073fe3328cdd720bc7c9;hpb=428870ff734fdaccc342b33fc53cf94724409a46;p=zfs.git

diff --git a/module/zfs/dsl_synctask.c b/module/zfs/dsl_synctask.c
index 832685b..9777029 100644
--- a/module/zfs/dsl_synctask.c
+++ b/module/zfs/dsl_synctask.c
@@ -147,7 +147,7 @@ dsl_sync_task_group_destroy(dsl_sync_task_group_t *dstg)
 {
 	dsl_sync_task_t *dst;
 
-	while (dst = list_head(&dstg->dstg_tasks)) {
+	while ((dst = list_head(&dstg->dstg_tasks))) {
 		list_remove(&dstg->dstg_tasks, dst);
 		kmem_free(dst, sizeof (dsl_sync_task_t));
 	}
@@ -213,6 +213,8 @@ dsl_sync_task_do(dsl_pool_t *dp,
 	dsl_sync_task_group_t *dstg;
 	int err;
 
+	ASSERT(spa_writeable(dp->dp_spa));
+
 	dstg = dsl_sync_task_group_create(dp);
 	dsl_sync_task_create(dstg, checkfunc, syncfunc,
 	    arg1, arg2, blocks_modified);
@@ -228,6 +230,9 @@ dsl_sync_task_do_nowait(dsl_pool_t *dp,
 {
 	dsl_sync_task_group_t *dstg;
 
+	if (!spa_writeable(dp->dp_spa))
+		return;
+
 	dstg = dsl_sync_task_group_create(dp);
 	dsl_sync_task_create(dstg, checkfunc, syncfunc,
 	    arg1, arg2, blocks_modified);