diff --git a/Makefile b/Makefile
index ac70441..5d9f95e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-CC=gcc
+CC?=gcc
 CFLAGS=-I. -Wall -g
 LDFLAGS=
 OBJS=predict.o adaptivemmd.o
@@ -18,4 +18,3 @@ adaptivemmd: $(OBJS)
 
 clean:
 	rm -f $(OBJS) adaptivemmd cscope.*
-
diff --git a/adaptivemmd.c b/adaptivemmd.c
index 6139c2a..edcb4dc 100644
--- a/adaptivemmd.c
+++ b/adaptivemmd.c
@@ -76,8 +76,8 @@
 
 unsigned long min_wmark[MAX_NUMANODES], low_wmark[MAX_NUMANODES];
 unsigned long high_wmark[MAX_NUMANODES], managed_pages[MAX_NUMANODES];
-unsigned long total_free_pages, total_cache_pages, total_hugepages, base_psize;
-long compaction_rate, reclaim_rate;
+unsigned long total_free_pages, total_cache_pages, base_psize;
+long compaction_rate, reclaim_rate, total_hugepages;
 struct lsq_struct page_lsq[MAX_NUMANODES][MAX_ORDER];
 int dry_run;
 int debug_mode, verbose, del_lock = 0;
@@ -315,7 +315,7 @@ update_hugepages()
 {
 	DIR *dp;
 	struct dirent *ep;
-	unsigned long newhpages = 0;
+	long newhpages = 0;
 	int rc = -1;
 
 	dp = opendir(HUGEPAGESINFO);
@@ -343,7 +343,7 @@ update_hugepages()
 		if (newhpages) {
 			unsigned long tmp;
 
-			tmp = abs(newhpages - total_hugepages);
+			tmp = llabs(newhpages - total_hugepages);
 			/*
 			 * If number of hugepages changes from 0 to a
 			 * positive number, percentage calculation will
@@ -376,8 +376,9 @@ update_hugepages()
 #define ZONE_LOW	"low"
 #define ZONE_HIGH	"high"
 #define ZONE_MNGD	"managed"
-#define ZONE_PGST	"pagesets"
-int
+#define ZONE_PROT	"protection:"
+
+void
 update_zone_watermarks()
 {
 	FILE *fp = NULL;
@@ -387,13 +388,16 @@ update_zone_watermarks()
 
 	fp = fopen(ZONEINFO, "r");
 	if (!fp)
-		return 0;
+		goto out_free;
 
 	while ((fgets(line, len, fp) != NULL)) {
 		if (strncmp(line, "Node", 4) == 0) {
 			char node[FLDLEN], zone[FLDLEN], zone_name[FLDLEN];
 			int nid;
-			unsigned long min, low, high, managed;
+			unsigned long min = 0;
+			unsigned long low = 0;
+			unsigned long high = 0;
+			unsigned long managed = 0;
 
 			sscanf(line, "%s %d, %s %8s\n", node, &nid, zone, zone_name);
 			if ((current_node == -1) || (current_node != nid)) {
@@ -413,10 +417,6 @@ update_zone_watermarks()
 			 * Ignore pages in DMA zone for x86 and x86-64.
 			 */
 			if (!skip_dmazone || (strncmp("DMA", zone_name, FLDLEN) != 0)) {
-				/*
-				 * We found the normal zone. Now look for
-				 * line "pages free"
-				 */
 				if (fgets(line, len, fp) == NULL)
 					goto out;
 
@@ -436,7 +436,7 @@ update_zone_watermarks()
 						high = val;
 					if (strncmp(name, ZONE_MNGD, sizeof(ZONE_MNGD)) == 0)
 						managed = val;
-					if (strncmp(name, ZONE_PGST, sizeof(ZONE_PGST)) == 0)
+					if (strncmp(name, ZONE_PROT, sizeof(ZONE_PROT)) == 0)
 						break;
 				}
 
@@ -449,9 +449,9 @@ update_zone_watermarks()
 	}
 
 out:
-	free(line);
 	fclose(fp);
-	return 0;
+out_free:
+	free(line);
 }
 
 /*
@@ -511,14 +511,15 @@ no_pages_reclaimed()
 	FILE *fp = NULL;
 	size_t len = 100;
 	char *line = malloc(len);
-	unsigned long val, reclaimed;
+	unsigned long val = 0;
+	unsigned long reclaimed = 0;
 	char desc[100];
 
 	fp = fopen(VMSTAT, "r");
 	if (!fp)
-		return 0;
+		goto out;
 
-	total_cache_pages = reclaimed = 0;
+	total_cache_pages = 0;
 	while ((fgets(line, len, fp) != NULL)) {
 		sscanf(line, "%s %lu\n", desc, &val );
 		if (strcmp(desc, "pgsteal_kswapd") == 0)
@@ -533,8 +534,9 @@ no_pages_reclaimed()
 			total_cache_pages += val;
 	}
 
-	free(line);
 	fclose(fp);
+out:
+	free(line);
 	return reclaimed;
 }
 
@@ -756,7 +758,7 @@ rescale_watermarks(int scale_up)
 
 	log_info(1, "Adjusting watermarks. Current watermark scale factor = %s", scaled_wmark);
 	if (dry_run)
-		goto out;
+		return;
 
 	log_info(1, "New watermark scale factor = %ld", scaled_watermark);
 	sprintf(scaled_wmark, "%ld\n", scaled_watermark);
@@ -789,7 +791,7 @@ static int
 check_permissions(void)
 {
 	int fd;
-	char tmpstr[40];
+	char tmpstr[40] = {0};
 
 	/*
 	 * Make sure running kernel supports watermark_scale_factor file
@@ -802,6 +804,7 @@ check_permissions(void)
 	/* Can we write to this file */
 	if (read(fd, tmpstr, sizeof(tmpstr)) < 0) {
 		log_err("Can not read "RESCALE_WMARK" (%s)", strerror(errno));
+		close(fd);
 		return 0;
 	}
 	close(fd);
@@ -812,6 +815,7 @@ check_permissions(void)
 
 	if (write(fd, tmpstr, strlen(tmpstr)) < 0) {
 		log_err("Can not write to "RESCALE_WMARK" (%s)", strerror(errno));
+		close(fd);
 		return 0;
 	}
 	close(fd);
@@ -1233,7 +1237,7 @@ parse_config()
 			 * instead to doing it through adaptivemmd
 			 */
 			if (val > MAX_NEGDENTRY)
-				log_err("Bad value for negative dentry cap = %d (>%d). Proceeding with default of %d", val, MAX_NEGDENTRY, neg_dentry_pct);
+				log_err("Bad value for negative dentry cap = %ld (>%d). Proceeding with default of %d", val, MAX_NEGDENTRY, neg_dentry_pct);
 			else if (val < 1)
 				neg_dentry_pct = 1;
 			else
@@ -1415,7 +1419,7 @@ main(int argc, char **argv)
 	 */
 	base_psize = getpagesize()/1024;
 
-	pr_info("adaptivemmd "VERSION" started (verbose=%d, aggressiveness=%d, maxgap=%d)", verbose, aggressiveness, maxgap);
+	pr_info("adaptivemmd "VERSION" started (verbose=%d, aggressiveness=%d, maxgap=%lu)", verbose, aggressiveness, maxgap);
 
 	one_time_initializations();
 
diff --git a/predict.c b/predict.c
index b26b99e..e888014 100644
--- a/predict.c
+++ b/predict.c
@@ -220,11 +220,11 @@ predict(struct frag_info *frag_vec, struct lsq_struct *lsq,
 		if (frag_vec[0].free_pages <= high_wmark) {
 			retval |= MEMPREDICT_RECLAIM;
 			log_info(2, "Reclamation recommended due to free pages being below high watermark");
-			log_info(2, "Consumption rate on node %d=%ld pages/msec, reclaim rate is %ld pages/msec, Free pages=%ld, low wmark=%ld, high wmark=%ld", nid, abs(m[0]), reclaim_rate, frag_vec[0].free_pages, low_wmark, high_wmark);
+			log_info(2, "Consumption rate on node %d=%lld pages/msec, reclaim rate is %ld pages/msec, Free pages=%lld, low wmark=%lu, high wmark=%lu", nid, llabs(m[0]), reclaim_rate, frag_vec[0].free_pages, low_wmark, high_wmark);
 		}
 		else {
 			time_taken = (frag_vec[0].free_pages - high_wmark)
-					/ abs(m[0]);
+					/ llabs(m[0]);
 
 			/*
 			 * Time to reclaim frag_vec[0].free_pages - high_wmark
@@ -244,7 +244,7 @@ predict(struct frag_info *frag_vec, struct lsq_struct *lsq,
 			 */
 			if (time_taken <= (3*time_to_catchup)) {
 				log_info(3, "Reclamation recommended due to high memory consumption rate");
-				log_info(3, "Consumption rate on node %d=%ld pages/msec, reclaim rate is %ld pages/msec, Free pages=%ld, low wmark=%ld, high wmark=%ld", nid, abs(m[0]), reclaim_rate, frag_vec[0].free_pages, low_wmark, high_wmark);
+				log_info(3, "Consumption rate on node %d=%lld pages/msec, reclaim rate is %ld pages/msec, Free pages=%lld, low wmark=%lu, high wmark=%lu", nid, llabs(m[0]), reclaim_rate, frag_vec[0].free_pages, low_wmark, high_wmark);
 				log_info(3, "Time to below high watermark= %ld msec, time to catch up=%ld msec", time_taken, time_to_catchup);
 				retval |= MEMPREDICT_RECLAIM;
 			}
@@ -320,7 +320,7 @@ predict(struct frag_info *frag_vec, struct lsq_struct *lsq,
 			if (higher_order_pages < (m[order] * x_cross)) {
 				log_info(2, "Compaction recommended on node %d. Running out of order %d pages", nid, order);
 				if (order < (MAX_ORDER -1))
-					log_info(3, "No. of free order %d pages = %ld base pages, consumption rate=%ld pages/msec", order, (frag_vec[order+1].free_pages - frag_vec[order].free_pages), m[order]);
+					log_info(3, "No. of free order %d pages = %lld base pages, consumption rate=%lld pages/msec", order, (frag_vec[order+1].free_pages - frag_vec[order].free_pages), m[order]);
 				 log_info(3, "Current compaction rate=%ld pages/msec", compaction_rate);
 				retval |= MEMPREDICT_COMPACT;
 				break;
@@ -351,7 +351,7 @@ predict(struct frag_info *frag_vec, struct lsq_struct *lsq,
 			if (time_taken >= time_to_catchup) {
 				log_info(3, "Compaction recommended on node %d. Order %d pages consumption rate is high", nid, order);
 				if (order < (MAX_ORDER -1))
-					log_info(3, "No. of free order %d pages = %ld base pages, consumption rate=%ld pages/msec", order, (frag_vec[order+1].free_pages - frag_vec[order].free_pages), m[order]);
+					log_info(3, "No. of free order %d pages = %lld base pages, consumption rate=%lld pages/msec", order, (frag_vec[order+1].free_pages - frag_vec[order].free_pages), m[order]);
 				 log_info(3, "Current compaction rate=%ld pages/msec, Exhaustion in %ld msec", compaction_rate, time_taken);
 				retval |= MEMPREDICT_COMPACT;
 				break;
diff --git a/predict.h b/predict.h
index 9363e06..ab3f128 100644
--- a/predict.h
+++ b/predict.h
@@ -81,7 +81,7 @@ unsigned long predict(struct frag_info *, struct lsq_struct *,
 /* Use pr_info to log info irrespective of verbosity level */
 #define pr_info(...)	log_msg(LOG_INFO, __VA_ARGS__)
 
-extern void log_msg(int level, char *fmt, ...);
+extern void log_msg(int level, char *fmt, ...) __attribute__((format(printf, 2, 3)));
 
 #ifdef __cplusplus
 }