tty: vt, ignore PIO_UNIMAPCLR param

We do not do hashtables for unicode fonts since 1995 (1.3.28). So it
is time to remove the second parameter of con_clear_unimap and ignore
the advice from userspace completely.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c
index c8c91f0..9d7ab7b 100644 (file)
--- a/drivers/tty/vt/consolemap.c
+++ b/drivers/tty/vt/consolemap.c
@@ -499,9 +499,8 @@ con_insert_unipair(struct uni_pagedir *p, u_short unicode, u_short fontpos)
        return 0;
 }
 
-/* ui is a leftover from using a hashtable, but might be used again
-   Caller must hold the lock */
-static int con_do_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
+/* Caller must hold the lock */
+static int con_do_clear_unimap(struct vc_data *vc)
 {
        struct uni_pagedir *p, *q;
 
@@ -524,11 +523,11 @@ static int con_do_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
        return 0;
 }
 
-int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
+int con_clear_unimap(struct vc_data *vc)
 {
        int ret;
        console_lock();
-       ret = con_do_clear_unimap(vc, ui);
+       ret = con_do_clear_unimap(vc);
        console_unlock();
        return ret;
 }
@@ -556,7 +555,7 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
                int j, k;
                u16 **p1, *p2, l;
                
-               err1 = con_do_clear_unimap(vc, NULL);
+               err1 = con_do_clear_unimap(vc);
                if (err1) {
                        console_unlock();
                        return err1;
@@ -677,7 +676,7 @@ int con_set_default_unimap(struct vc_data *vc)
        
        /* The default font is always 256 characters */
 
-       err = con_do_clear_unimap(vc, NULL);
+       err = con_do_clear_unimap(vc);
        if (err)
                return err;
     

diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index 97d5a74..f62c598 100644 (file)
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -1006,16 +1006,10 @@ int vt_ioctl(struct tty_struct *tty,
                break;
 
        case PIO_UNIMAPCLR:
-             { struct unimapinit ui;
                if (!perm)
                        return -EPERM;
-               ret = copy_from_user(&ui, up, sizeof(struct unimapinit));
-               if (ret)
-                       ret = -EFAULT;
-               else
-                       con_clear_unimap(vc, &ui);
+               con_clear_unimap(vc);
                break;
-             }
 
        case PIO_UNIMAP:
        case GIO_UNIMAP:

diff --git a/include/linux/vt_kern.h b/include/linux/vt_kern.h
index 160f81f..6abd24f 100644 (file)
--- a/include/linux/vt_kern.h
+++ b/include/linux/vt_kern.h
@@ -59,14 +59,13 @@ int tioclinux(struct tty_struct *tty, unsigned long arg);
 #ifdef CONFIG_CONSOLE_TRANSLATIONS
 /* consolemap.c */
 
-struct unimapinit;
 struct unipair;
 
 int con_set_trans_old(unsigned char __user * table);
 int con_get_trans_old(unsigned char __user * table);
 int con_set_trans_new(unsigned short __user * table);
 int con_get_trans_new(unsigned short __user * table);
-int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui);
+int con_clear_unimap(struct vc_data *vc);
 int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list);
 int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct unipair __user *list);
 int con_set_default_unimap(struct vc_data *vc);
@@ -92,7 +91,7 @@ static inline int con_get_trans_new(unsigned short __user *table)
 {
        return -EINVAL;
 }
-static inline int con_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
+static inline int con_clear_unimap(struct vc_data *vc)
 {
        return 0;
 }