add consts where appropriate in fs/nls/*

Add const modifiers to a few struct nls_table's member pointers in
include/linux/nls.h and adds a lot of const's in fs/nls/*.c files.

Resulting changes as visible by size:

   text    data     bss     dec     hex filename
 113612  481216    2368  597196   91ccc nls.org/built-in.o
 593548    3296     288  597132   91c8c nls/built-in.o

Apparently compiler managed to optimize code a bit better
because of const-ness.

No other changes are made.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/include/linux/nls.h b/include/linux/nls.h
index 816c04ad7381..6a882208301a 100644
--- a/include/linux/nls.h
+++ b/include/linux/nls.h
@@ -7,13 +7,13 @@
 typedef __u16 wchar_t;
 
 struct nls_table {
-        char *charset;
-        char *alias;
+        const char *charset;
+        const char *alias;
         int (*uni2char) (wchar_t uni, unsigned char *out, int boundlen);
         int (*char2uni) (const unsigned char *rawstring, int boundlen,
                          wchar_t *uni);
-        unsigned char *charset2lower;
-        unsigned char *charset2upper;
+        const unsigned char *charset2lower;
+        const unsigned char *charset2upper;
         struct module *owner;
         struct nls_table *next;
 };