fs/nls: make load_nls() take a const parameter

load_nls() take a char * parameter, use it to find nls module in list or
construct the module name to load it.

This change make load_nls() take a const parameter, so we don't need do
some cast like this:

        ses->local_nls = load_nls((char *)ctx->local_nls->charset);

Suggested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Winston Wen <wentao@uniontech.com>
Reviewed-by: Paulo Alcantara <pc@manguebit.com>
Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/nls/nls_base.c b/fs/nls/nls_base.c
index 52ccd34..a026dbd 100644 (file)
--- a/fs/nls/nls_base.c
+++ b/fs/nls/nls_base.c
@@ -272,7 +272,7 @@ int unregister_nls(struct nls_table * nls)
        return -EINVAL;
 }
 
-static struct nls_table *find_nls(char *charset)
+static struct nls_table *find_nls(const char *charset)
 {
        struct nls_table *nls;
        spin_lock(&nls_lock);
@@ -288,7 +288,7 @@ static struct nls_table *find_nls(char *charset)
        return nls;
 }
 
-struct nls_table *load_nls(char *charset)
+struct nls_table *load_nls(const char *charset)
 {
        return try_then_request_module(find_nls(charset), "nls_%s", charset);
 }

diff --git a/include/linux/nls.h b/include/linux/nls.h
index 499e486..e0bf836 100644 (file)
--- a/include/linux/nls.h
+++ b/include/linux/nls.h
@@ -47,7 +47,7 @@ enum utf16_endian {
 /* nls_base.c */
 extern int __register_nls(struct nls_table *, struct module *);
 extern int unregister_nls(struct nls_table *);
-extern struct nls_table *load_nls(char *);
+extern struct nls_table *load_nls(const char *charset);
 extern void unload_nls(struct nls_table *);
 extern struct nls_table *load_nls_default(void);
 #define register_nls(nls) __register_nls((nls), THIS_MODULE)