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path: root/drivers/tty/vt/consolemap.c
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Diffstat (limited to 'drivers/tty/vt/consolemap.c')
-rw-r--r--drivers/tty/vt/consolemap.c57
1 files changed, 23 insertions, 34 deletions
diff --git a/drivers/tty/vt/consolemap.c b/drivers/tty/vt/consolemap.c
index 248381b3072..610b720d3b9 100644
--- a/drivers/tty/vt/consolemap.c
+++ b/drivers/tty/vt/consolemap.c
@@ -179,7 +179,6 @@ struct uni_pagedir {
unsigned long sum;
unsigned char *inverse_translations[4];
u16 *inverse_trans_unicode;
- int readonly;
};
static struct uni_pagedir *dflt;
@@ -194,8 +193,7 @@ static void set_inverse_transl(struct vc_data *conp, struct uni_pagedir *p, int
q = p->inverse_translations[i];
if (!q) {
- q = p->inverse_translations[i] = (unsigned char *)
- kmalloc(MAX_GLYPH, GFP_KERNEL);
+ q = p->inverse_translations[i] = kmalloc(MAX_GLYPH, GFP_KERNEL);
if (!q) return;
}
memset(q, 0, MAX_GLYPH);
@@ -263,7 +261,7 @@ u16 inverse_translate(struct vc_data *conp, int glyph, int use_unicode)
int m;
if (glyph < 0 || glyph >= MAX_GLYPH)
return 0;
- else if (!(p = (struct uni_pagedir *)*conp->vc_uni_pagedir_loc))
+ else if (!(p = *conp->vc_uni_pagedir_loc))
return glyph;
else if (use_unicode) {
if (!p->inverse_trans_unicode)
@@ -288,7 +286,7 @@ static void update_user_maps(void)
for (i = 0; i < MAX_NR_CONSOLES; i++) {
if (!vc_cons_allocated(i))
continue;
- p = (struct uni_pagedir *)*vc_cons[i].d->vc_uni_pagedir_loc;
+ p = *vc_cons[i].d->vc_uni_pagedir_loc;
if (p && p != q) {
set_inverse_transl(vc_cons[i].d, p, USER_MAP);
set_inverse_trans_unicode(vc_cons[i].d, p);
@@ -419,10 +417,10 @@ void con_free_unimap(struct vc_data *vc)
{
struct uni_pagedir *p;
- p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
+ p = *vc->vc_uni_pagedir_loc;
if (!p)
return;
- *vc->vc_uni_pagedir_loc = 0;
+ *vc->vc_uni_pagedir_loc = NULL;
if (--p->refcount)
return;
con_release_unimap(p);
@@ -437,7 +435,7 @@ static int con_unify_unimap(struct vc_data *conp, struct uni_pagedir *p)
for (i = 0; i < MAX_NR_CONSOLES; i++) {
if (!vc_cons_allocated(i))
continue;
- q = (struct uni_pagedir *)*vc_cons[i].d->vc_uni_pagedir_loc;
+ q = *vc_cons[i].d->vc_uni_pagedir_loc;
if (!q || q == p || q->sum != p->sum)
continue;
for (j = 0; j < 32; j++) {
@@ -460,7 +458,7 @@ static int con_unify_unimap(struct vc_data *conp, struct uni_pagedir *p)
}
if (j == 32) {
q->refcount++;
- *conp->vc_uni_pagedir_loc = (unsigned long)q;
+ *conp->vc_uni_pagedir_loc = q;
con_release_unimap(p);
kfree(p);
return 1;
@@ -501,10 +499,7 @@ static int con_do_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
{
struct uni_pagedir *p, *q;
- p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
- if (p && p->readonly)
- return -EIO;
-
+ p = *vc->vc_uni_pagedir_loc;
if (!p || --p->refcount) {
q = kzalloc(sizeof(*p), GFP_KERNEL);
if (!q) {
@@ -513,7 +508,7 @@ static int con_do_clear_unimap(struct vc_data *vc, struct unimapinit *ui)
return -ENOMEM;
}
q->refcount=1;
- *vc->vc_uni_pagedir_loc = (unsigned long)q;
+ *vc->vc_uni_pagedir_loc = q;
} else {
if (p == dflt) dflt = NULL;
p->refcount++;
@@ -537,19 +532,13 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
int err = 0, err1, i;
struct uni_pagedir *p, *q;
+ if (!ct)
+ return 0;
+
console_lock();
/* Save original vc_unipagdir_loc in case we allocate a new one */
- p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
- if (p->readonly) {
- console_unlock();
- return -EIO;
- }
-
- if (!ct) {
- console_unlock();
- return 0;
- }
+ p = *vc->vc_uni_pagedir_loc;
if (p->refcount > 1) {
int j, k;
@@ -565,7 +554,7 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
* Since refcount was > 1, con_clear_unimap() allocated a
* a new uni_pagedir for this vc. Re: p != q
*/
- q = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
+ q = *vc->vc_uni_pagedir_loc;
/*
* uni_pgdir is a 32*32*64 table with rows allocated
@@ -587,7 +576,7 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
err1 = con_insert_unipair(q, l, p2[k]);
if (err1) {
p->refcount++;
- *vc->vc_uni_pagedir_loc = (unsigned long)p;
+ *vc->vc_uni_pagedir_loc = p;
con_release_unimap(q);
kfree(q);
console_unlock();
@@ -656,12 +645,12 @@ int con_set_default_unimap(struct vc_data *vc)
struct uni_pagedir *p;
if (dflt) {
- p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
+ p = *vc->vc_uni_pagedir_loc;
if (p == dflt)
return 0;
dflt->refcount++;
- *vc->vc_uni_pagedir_loc = (unsigned long)dflt;
+ *vc->vc_uni_pagedir_loc = dflt;
if (p && !--p->refcount) {
con_release_unimap(p);
kfree(p);
@@ -675,7 +664,7 @@ int con_set_default_unimap(struct vc_data *vc)
if (err)
return err;
- p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
+ p = *vc->vc_uni_pagedir_loc;
q = dfont_unitable;
for (i = 0; i < 256; i++)
@@ -686,7 +675,7 @@ int con_set_default_unimap(struct vc_data *vc)
}
if (con_unify_unimap(vc, p)) {
- dflt = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
+ dflt = *vc->vc_uni_pagedir_loc;
return err;
}
@@ -714,9 +703,9 @@ int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
if (*dst_vc->vc_uni_pagedir_loc == *src_vc->vc_uni_pagedir_loc)
return 0;
con_free_unimap(dst_vc);
- q = (struct uni_pagedir *)*src_vc->vc_uni_pagedir_loc;
+ q = *src_vc->vc_uni_pagedir_loc;
q->refcount++;
- *dst_vc->vc_uni_pagedir_loc = (long)q;
+ *dst_vc->vc_uni_pagedir_loc = q;
return 0;
}
EXPORT_SYMBOL(con_copy_unimap);
@@ -738,7 +727,7 @@ int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct, struct uni
ect = 0;
if (*vc->vc_uni_pagedir_loc) {
- p = (struct uni_pagedir *)*vc->vc_uni_pagedir_loc;
+ p = *vc->vc_uni_pagedir_loc;
for (i = 0; i < 32; i++)
if ((p1 = p->uni_pgdir[i]))
for (j = 0; j < 32; j++)
@@ -811,7 +800,7 @@ conv_uni_to_pc(struct vc_data *conp, long ucs)
if (!*conp->vc_uni_pagedir_loc)
return -3;
- p = (struct uni_pagedir *)*conp->vc_uni_pagedir_loc;
+ p = *conp->vc_uni_pagedir_loc;
if ((p1 = p->uni_pgdir[ucs >> 11]) &&
(p2 = p1[(ucs >> 6) & 0x1f]) &&
(h = p2[ucs & 0x3f]) < MAX_GLYPH)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 12:08:57 +0000