diff --git a/fs/affs/bitmap.c b/fs/affs/bitmap.c
index b330009fe42dbdb02ca987169981a9e67706e7e4..c4a5ad09ddf2c2a76d38ddf4d91f7126058029c3 100644
--- a/fs/affs/bitmap.c
+++ b/fs/affs/bitmap.c
@@ -11,7 +11,7 @@
 
 /* This is, of course, shamelessly stolen from fs/minix */
 
-static int nibblemap[] = { 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4 };
+static const int nibblemap[] = { 0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4 };
 
 static u32
 affs_count_free_bits(u32 blocksize, const void *data)
diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 9157fcf887bc0c2b782a97396f824f8055caf8e7..834ad4c16e2d9a61598504d6a414a29bb2b5e82b 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -522,7 +522,7 @@ int ext2_new_block(struct inode *inode, unsigned long goal,
 
 #ifdef EXT2FS_DEBUG
 
-static int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
+static const int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
 
 unsigned long ext2_count_free (struct buffer_head * map, unsigned int numchars)
 {
diff --git a/fs/ext3/bitmap.c b/fs/ext3/bitmap.c
index b9176eed98d1258518bd9cebfbbdb071baa458fc..6afc39d80253cf4560ce69b9a4b1983d1df3871b 100644
--- a/fs/ext3/bitmap.c
+++ b/fs/ext3/bitmap.c
@@ -13,7 +13,7 @@
 
 #ifdef EXT3FS_DEBUG
 
-static int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
+static const int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
 
 unsigned long ext3_count_free (struct buffer_head * map, unsigned int numchars)
 {
diff --git a/fs/ext4/bitmap.c b/fs/ext4/bitmap.c
index 11e93c169bcfdf5474b2bbcb76a8fed2af61e66e..420554f8f79d8f4fb4a99a95bec9539e6c78f8bc 100644
--- a/fs/ext4/bitmap.c
+++ b/fs/ext4/bitmap.c
@@ -13,7 +13,7 @@
 
 #ifdef EXT4FS_DEBUG
 
-static int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
+static const int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
 
 unsigned long ext4_count_free (struct buffer_head * map, unsigned int numchars)
 {
diff --git a/fs/minix/bitmap.c b/fs/minix/bitmap.c
index 99a12f12776965e622a547030018bcf47a46d153..703cc35e04b94ce6126ae390f03f066c0fb26618 100644
--- a/fs/minix/bitmap.c
+++ b/fs/minix/bitmap.c
@@ -17,7 +17,7 @@
 #include <linux/bitops.h>
 #include <linux/sched.h>
 
-static int nibblemap[] = { 4,3,3,2,3,2,2,1,3,2,2,1,2,1,1,0 };
+static const int nibblemap[] = { 4,3,3,2,3,2,2,1,3,2,2,1,2,1,1,0 };
 
 static unsigned long count_free(struct buffer_head *map[], unsigned numblocks, __u32 numbits)
 {