Index: kernel/genarch/src/mm/page_pt.c
===================================================================
--- kernel/genarch/src/mm/page_pt.c	(revision 31a30fa95fcc2cc5a9f00dce265d29d16090b44f)
+++ kernel/genarch/src/mm/page_pt.c	(revision db8626d33fa833ea7e61d8d157724b3b47ba0cfa)
@@ -415,5 +415,5 @@
 	    addr - 1 < base + size - 1;
 	    addr += ptl0_step) {
-		if (GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(addr))) {
+		if (GET_PTL1_ADDRESS(ptl0, PTL0_INDEX(addr)) != 0) {
 			ASSERT(overlaps(addr, ptl0_step,
 			    config.identity_base, config.identity_size));
Index: uspace/app/sbi/src/tdata.c
===================================================================
--- uspace/app/sbi/src/tdata.c	(revision 31a30fa95fcc2cc5a9f00dce265d29d16090b44f)
+++ uspace/app/sbi/src/tdata.c	(revision db8626d33fa833ea7e61d8d157724b3b47ba0cfa)
@@ -418,5 +418,5 @@
 	list_node_t *arg_n;
 	tdata_item_t *arg_ti;
-	tdata_item_t *narg_ti;
+	tdata_item_t *narg_ti = NULL;
 
 	tnew = tdata_fun_sig_new();
Index: uspace/lib/http/src/request.c
===================================================================
--- uspace/lib/http/src/request.c	(revision 31a30fa95fcc2cc5a9f00dce265d29d16090b44f)
+++ uspace/lib/http/src/request.c	(revision db8626d33fa833ea7e61d8d157724b3b47ba0cfa)
@@ -143,6 +143,6 @@
 int http_send_request(http_t *http, http_request_t *req)
 {
-	char *buf;
-	size_t buf_size;
+	char *buf = NULL;
+	size_t buf_size = 0;
 	
 	int rc = http_request_format(req, &buf, &buf_size);
Index: uspace/srv/fs/exfat/exfat_fat.c
===================================================================
--- uspace/srv/fs/exfat/exfat_fat.c	(revision 31a30fa95fcc2cc5a9f00dce265d29d16090b44f)
+++ uspace/srv/fs/exfat/exfat_fat.c	(revision db8626d33fa833ea7e61d8d157724b3b47ba0cfa)
@@ -193,5 +193,5 @@
 	uint32_t clusters;
 	uint32_t max_clusters;
-	exfat_cluster_t c;
+	exfat_cluster_t c = EXFAT_CLST_FIRST;
 	int rc;
 
Index: uspace/srv/fs/fat/fat_fat.c
===================================================================
--- uspace/srv/fs/fat/fat_fat.c	(revision 31a30fa95fcc2cc5a9f00dce265d29d16090b44f)
+++ uspace/srv/fs/fat/fat_fat.c	(revision db8626d33fa833ea7e61d8d157724b3b47ba0cfa)
@@ -748,5 +748,6 @@
 {
 	unsigned fatno;
-	fat_cluster_t nextc, clst_bad = FAT_CLST_BAD(bs);
+	fat_cluster_t nextc = 0;
+	fat_cluster_t clst_bad = FAT_CLST_BAD(bs);
 	int rc;