diff --git a/arch/mips/au1000/db1x00/init.c b/arch/mips/au1000/db1x00/init.c
index 5ebe0de5e459..847413514964 100644
--- a/arch/mips/au1000/db1x00/init.c
+++ b/arch/mips/au1000/db1x00/init.c
@@ -57,6 +57,6 @@ void __init prom_init(void)
 	if (!memsize_str)
 		memsize = 0x04000000;
 	else
-		memsize = strict_strtol(memsize_str, 0, NULL);
+		strict_strtol(memsize_str, 0, &memsize);
 	add_memory_region(0, memsize, BOOT_MEM_RAM);
 }
diff --git a/arch/mips/au1000/mtx-1/init.c b/arch/mips/au1000/mtx-1/init.c
index 33a4aebe0cba..3bae13c28954 100644
--- a/arch/mips/au1000/mtx-1/init.c
+++ b/arch/mips/au1000/mtx-1/init.c
@@ -55,6 +55,6 @@ void __init prom_init(void)
 	if (!memsize_str)
 		memsize = 0x04000000;
 	else
-		memsize = strict_strtol(memsize_str, 0, NULL);
+		strict_strtol(memsize_str, 0, &memsize);
 	add_memory_region(0, memsize, BOOT_MEM_RAM);
 }
diff --git a/arch/mips/au1000/pb1000/init.c b/arch/mips/au1000/pb1000/init.c
index 3837365d613d..8a9c7d57208d 100644
--- a/arch/mips/au1000/pb1000/init.c
+++ b/arch/mips/au1000/pb1000/init.c
@@ -52,6 +52,6 @@ void __init prom_init(void)
 	if (!memsize_str)
 		memsize = 0x04000000;
 	else
-		memsize = strict_strtol(memsize_str, 0, NULL);
+		strict_strtol(memsize_str, 0, &memsize);
 	add_memory_region(0, memsize, BOOT_MEM_RAM);
 }
diff --git a/arch/mips/au1000/pb1100/init.c b/arch/mips/au1000/pb1100/init.c
index 8355483f3de2..7c6792308bc5 100644
--- a/arch/mips/au1000/pb1100/init.c
+++ b/arch/mips/au1000/pb1100/init.c
@@ -54,7 +54,7 @@ void __init prom_init(void)
 	if (!memsize_str)
 		memsize = 0x04000000;
 	else
-		memsize = strict_strtol(memsize_str, 0, NULL);
+		strict_strtol(memsize_str, 0, &memsize);
 
 	add_memory_region(0, memsize, BOOT_MEM_RAM);
 }
diff --git a/arch/mips/au1000/pb1200/init.c b/arch/mips/au1000/pb1200/init.c
index 09fd63b86062..e9b2a0fd48ae 100644
--- a/arch/mips/au1000/pb1200/init.c
+++ b/arch/mips/au1000/pb1200/init.c
@@ -53,6 +53,6 @@ void __init prom_init(void)
 	if (!memsize_str)
 		memsize = 0x08000000;
 	else
-		memsize = strict_strtol(memsize_str, 0, NULL);
+		strict_strtol(memsize_str, 0, &memsize);
 	add_memory_region(0, memsize, BOOT_MEM_RAM);
 }
diff --git a/arch/mips/au1000/pb1500/init.c b/arch/mips/au1000/pb1500/init.c
index 49f51e165863..3b6e395cf952 100644
--- a/arch/mips/au1000/pb1500/init.c
+++ b/arch/mips/au1000/pb1500/init.c
@@ -53,6 +53,6 @@ void __init prom_init(void)
 	if (!memsize_str)
 		memsize = 0x04000000;
 	else
-		memsize = strict_strtol(memsize_str, 0, NULL);
+		strict_strtol(memsize_str, 0, &memsize);
 	add_memory_region(0, memsize, BOOT_MEM_RAM);
 }
diff --git a/arch/mips/au1000/pb1550/init.c b/arch/mips/au1000/pb1550/init.c
index 1b5f58434bb7..e1055a13a1a0 100644
--- a/arch/mips/au1000/pb1550/init.c
+++ b/arch/mips/au1000/pb1550/init.c
@@ -53,6 +53,6 @@ void __init prom_init(void)
 	if (!memsize_str)
 		memsize = 0x08000000;
 	else
-		memsize = strict_strtol(memsize_str, 0, NULL);
+		strict_strtol(memsize_str, 0, &memsize);
 	add_memory_region(0, memsize, BOOT_MEM_RAM);
 }
diff --git a/arch/mips/au1000/xxs1500/init.c b/arch/mips/au1000/xxs1500/init.c
index b849bf501c04..7516434760a1 100644
--- a/arch/mips/au1000/xxs1500/init.c
+++ b/arch/mips/au1000/xxs1500/init.c
@@ -53,6 +53,6 @@ void __init prom_init(void)
 	if (!memsize_str)
 		memsize = 0x04000000;
 	else
-		memsize = strict_strtol(memsize_str, 0, NULL);
+		strict_strtol(memsize_str, 0, &memsize);
 	add_memory_region(0, memsize, BOOT_MEM_RAM);
 }