[PATCH] fbdev modedb: make more pointer parameters const

fbdev modedb: make more input and output pointer parameters const

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: James Simmons <jsimmons@infradead.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 files changed, 52 insertions, 49 deletions

diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 31f476a64790..ce5ac268074e 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -2071,7 +2071,7 @@ static int fbcon_resize(struct vc_data *vc, unsigned int width,
         y_diff = info->var.yres - var.yres;
         if (x_diff < 0 || x_diff > virt_fw ||
             y_diff < 0 || y_diff > virt_fh) {
-                struct fb_videomode *mode;
+                const struct fb_videomode *mode;
 
                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
                 mode = fb_find_best_mode(&var, &info->modelist);
@@ -2975,7 +2975,7 @@ static void fbcon_new_modelist(struct fb_info *info)
         int i;
         struct vc_data *vc;
         struct fb_var_screeninfo var;
-        struct fb_videomode *mode;
+        const struct fb_videomode *mode;
 
         for (i = first_fb_vc; i <= last_fb_vc; i++) {
                 if (registered_fb[con2fb_map[i]] != info)
diff --git a/drivers/video/console/fbcon.h b/drivers/video/console/fbcon.h
index b9386d168c04..71f24e00fcd0 100644
--- a/drivers/video/console/fbcon.h
+++ b/drivers/video/console/fbcon.h
@@ -48,7 +48,7 @@ struct display {
     struct fb_bitfield green;
     struct fb_bitfield blue;
     struct fb_bitfield transp;
-    struct fb_videomode *mode;
+    const struct fb_videomode *mode;
 };
 
 struct fbcon_ops {
diff --git a/drivers/video/fbsysfs.c b/drivers/video/fbsysfs.c
index 323bdf6fc7d5..818fb09105f9 100644
--- a/drivers/video/fbsysfs.c
+++ b/drivers/video/fbsysfs.c
@@ -175,7 +175,7 @@ static ssize_t store_modes(struct device *device,
 
         acquire_console_sem();
         list_splice(&fb_info->modelist, &old_list);
-        fb_videomode_to_modelist((struct fb_videomode *)buf, i,
+        fb_videomode_to_modelist((const struct fb_videomode *)buf, i,
                                  &fb_info->modelist);
         if (fb_new_modelist(fb_info)) {
                 fb_destroy_modelist(&fb_info->modelist);
diff --git a/drivers/video/i810/i810_main.c b/drivers/video/i810/i810_main.c
index 29f89db428ce..ab1b8fe34d6d 100644
--- a/drivers/video/i810/i810_main.c
+++ b/drivers/video/i810/i810_main.c
@@ -1049,7 +1049,7 @@ static int i810_check_params(struct fb_var_screeninfo *var,
                 mode_valid = 1;
 
         if (!mode_valid && info->monspecs.modedb_len) {
-                struct fb_videomode *mode;
+                const struct fb_videomode *mode;
 
                 mode = fb_find_best_mode(var, &info->modelist);
                 if (mode) {
@@ -1924,7 +1924,7 @@ static void __devinit i810fb_find_init_mode(struct fb_info *info)
         fb_videomode_to_modelist(specs->modedb, specs->modedb_len,
                                  &info->modelist);
         if (specs->modedb != NULL) {
-                struct fb_videomode *m;
+                const struct fb_videomode *m;
 
                 if (xres && yres) {
                         if ((m = fb_find_best_mode(&var, &info->modelist))) {
diff --git a/drivers/video/modedb.c b/drivers/video/modedb.c
index 53427a734d4b..61fc6cd25fc1 100644
--- a/drivers/video/modedb.c
+++ b/drivers/video/modedb.c
@@ -668,7 +668,7 @@ done:
  * @var: pointer to struct fb_var_screeninfo
  */
 void fb_var_to_videomode(struct fb_videomode *mode,
-                         struct fb_var_screeninfo *var)
+                         const struct fb_var_screeninfo *var)
 {
         u32 pixclock, hfreq, htotal, vtotal;
 
@@ -712,7 +712,7 @@ void fb_var_to_videomode(struct fb_videomode *mode,
  * @mode: pointer to struct fb_videomode
  */
 void fb_videomode_to_var(struct fb_var_screeninfo *var,
-                               struct fb_videomode *mode)
+                         const struct fb_videomode *mode)
 {
         var->xres = mode->xres;
         var->yres = mode->yres;
@@ -735,8 +735,8 @@ void fb_videomode_to_var(struct fb_var_screeninfo *var,
  * RETURNS:
  * 1 if equal, 0 if not
  */
-int fb_mode_is_equal(struct fb_videomode *mode1,
-                     struct fb_videomode *mode2)
+int fb_mode_is_equal(const struct fb_videomode *mode1,
+                     const struct fb_videomode *mode2)
 {
         return (mode1->xres         == mode2->xres &&
                 mode1->yres         == mode2->yres &&
@@ -768,8 +768,8 @@ int fb_mode_is_equal(struct fb_videomode *mode1,
  * var->xres and var->yres.  If more than 1 videomode is found, will return
  * the videomode with the highest refresh rate
  */
-struct fb_videomode *fb_find_best_mode(struct fb_var_screeninfo *var,
-                                       struct list_head *head)
+const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
+                                             struct list_head *head)
 {
         struct list_head *pos;
         struct fb_modelist *modelist;
@@ -806,8 +806,8 @@ struct fb_videomode *fb_find_best_mode(struct fb_var_screeninfo *var,
  * If more than 1 videomode is found, will return the videomode with
  * the closest refresh rate.
  */
-struct fb_videomode *fb_find_nearest_mode(struct fb_videomode *mode,
-                                          struct list_head *head)
+const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
+                                                struct list_head *head)
 {
         struct list_head *pos;
         struct fb_modelist *modelist;
@@ -845,8 +845,8 @@ struct fb_videomode *fb_find_nearest_mode(struct fb_videomode *mode,
  * RETURNS:
  * struct fb_videomode, NULL if none found
  */
-struct fb_videomode *fb_match_mode(struct fb_var_screeninfo *var,
-                                   struct list_head *head)
+const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
+                                         struct list_head *head)
 {
         struct list_head *pos;
         struct fb_modelist *modelist;
@@ -870,7 +870,7 @@ struct fb_videomode *fb_match_mode(struct fb_var_screeninfo *var,
  * NOTES:
  * Will only add unmatched mode entries
  */
-int fb_add_videomode(struct fb_videomode *mode, struct list_head *head)
+int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head)
 {
         struct list_head *pos;
         struct fb_modelist *modelist;
@@ -905,7 +905,8 @@ int fb_add_videomode(struct fb_videomode *mode, struct list_head *head)
  * NOTES:
  * Will remove all matching mode entries
  */
-void fb_delete_videomode(struct fb_videomode *mode, struct list_head *head)
+void fb_delete_videomode(const struct fb_videomode *mode,
+                         struct list_head *head)
 {
         struct list_head *pos, *n;
         struct fb_modelist *modelist;
@@ -941,7 +942,7 @@ void fb_destroy_modelist(struct list_head *head)
  * @num: number of entries in array
  * @head: struct list_head of modelist
  */
-void fb_videomode_to_modelist(struct fb_videomode *modedb, int num,
+void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
                               struct list_head *head)
 {
         int i;
@@ -954,12 +955,12 @@ void fb_videomode_to_modelist(struct fb_videomode *modedb, int num,
         }
 }
 
-struct fb_videomode *fb_find_best_display(struct fb_monspecs *specs,
-                                          struct list_head *head)
+const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
+                                                struct list_head *head)
 {
         struct list_head *pos;
         struct fb_modelist *modelist;
-        struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
+        const struct fb_videomode *m, *m1 = NULL, *md = NULL, *best = NULL;
         int first = 0;
 
         if (!head->prev || !head->next || list_empty(head))
diff --git a/drivers/video/nvidia/nvidia.c b/drivers/video/nvidia/nvidia.c
index 547374230179..8e5b484db649 100644
--- a/drivers/video/nvidia/nvidia.c
+++ b/drivers/video/nvidia/nvidia.c
@@ -829,7 +829,7 @@ static int nvidiafb_check_var(struct fb_var_screeninfo *var,
         }
 
         if (!mode_valid) {
-                struct fb_videomode *mode;
+                const struct fb_videomode *mode;
 
                 mode = fb_find_best_mode(var, &info->modelist);
                 if (mode) {
@@ -1046,10 +1046,10 @@ static int __devinit nvidia_set_fbinfo(struct fb_info *info)
         }
 
         if (specs->modedb != NULL) {
-                struct fb_videomode *modedb;
+                const struct fb_videomode *mode;
 
-                modedb = fb_find_best_display(specs, &info->modelist);
-                fb_videomode_to_var(&nvidiafb_default_var, modedb);
+                mode = fb_find_best_display(specs, &info->modelist);
+                fb_videomode_to_var(&nvidiafb_default_var, mode);
                 nvidiafb_default_var.bits_per_pixel = bpp;
         } else if (par->fpWidth && par->fpHeight) {
                 char buf[16];
diff --git a/drivers/video/riva/fbdev.c b/drivers/video/riva/fbdev.c
index 9316905e027a..f2e9b742c92f 100644
--- a/drivers/video/riva/fbdev.c
+++ b/drivers/video/riva/fbdev.c
@@ -894,7 +894,8 @@ out:
         return rc;
 }
 
-static void riva_update_var(struct fb_var_screeninfo *var, struct fb_videomode *modedb)
+static void riva_update_var(struct fb_var_screeninfo *var,
+                            const struct fb_videomode *modedb)
 {
         NVTRACE_ENTER();
         var->xres = var->xres_virtual = modedb->xres;
@@ -1152,7 +1153,7 @@ static int rivafb_release(struct fb_info *info, int user)
 
 static int rivafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 {
-        struct fb_videomode *mode;
+        const struct fb_videomode *mode;
         struct riva_par *par = info->par;
         int nom, den;           /* translating from pixels->bytes */
         int mode_valid = 0;
diff --git a/drivers/video/savage/savagefb_driver.c b/drivers/video/savage/savagefb_driver.c
index 82b3deaae02d..4afa30522fdb 100644
--- a/drivers/video/savage/savagefb_driver.c
+++ b/drivers/video/savage/savagefb_driver.c
@@ -833,7 +833,8 @@ static void savage_set_default_par(struct savagefb_par *par,
         vga_out8(0x3d5, cr66, par);
 }
 
-static void savage_update_var(struct fb_var_screeninfo *var, struct fb_videomode *modedb)
+static void savage_update_var(struct fb_var_screeninfo *var,
+                              const struct fb_videomode *modedb)
 {
         var->xres = var->xres_virtual = modedb->xres;
         var->yres = modedb->yres;
@@ -902,7 +903,7 @@ static int savagefb_check_var(struct fb_var_screeninfo   *var,
         }
 
         if (!mode_valid) {
-                struct fb_videomode *mode;
+                const struct fb_videomode *mode;
 
                 mode = fb_find_best_mode(var, &info->modelist);
                 if (mode) {
@@ -2206,11 +2207,10 @@ static int __devinit savagefb_probe(struct pci_dev* dev,
                              info->monspecs.modedb, info->monspecs.modedb_len,
                              NULL, 8);
         } else if (info->monspecs.modedb != NULL) {
-                struct fb_videomode *modedb;
+                const struct fb_videomode *mode;
 
-                modedb = fb_find_best_display(&info->monspecs,
-                                              &info->modelist);
-                savage_update_var(&info->var, modedb);
+                mode = fb_find_best_display(&info->monspecs, &info->modelist);
+                savage_update_var(&info->var, mode);
         }
 
         /* maximize virtual vertical length */
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 9402dec393ac..a78e25683f82 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -952,25 +952,26 @@ extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
 /* drivers/video/modedb.c */
 #define VESA_MODEDB_SIZE 34
 extern void fb_var_to_videomode(struct fb_videomode *mode,
-                                struct fb_var_screeninfo *var);
+                                const struct fb_var_screeninfo *var);
 extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
-                                struct fb_videomode *mode);
-extern int fb_mode_is_equal(struct fb_videomode *mode1,
-                            struct fb_videomode *mode2);
-extern int fb_add_videomode(struct fb_videomode *mode, struct list_head *head);
-extern void fb_delete_videomode(struct fb_videomode *mode,
+                                const struct fb_videomode *mode);
+extern int fb_mode_is_equal(const struct fb_videomode *mode1,
+                            const struct fb_videomode *mode2);
+extern int fb_add_videomode(const struct fb_videomode *mode,
+                            struct list_head *head);
+extern void fb_delete_videomode(const struct fb_videomode *mode,
                                 struct list_head *head);
-extern struct fb_videomode *fb_match_mode(struct fb_var_screeninfo *var,
-                                          struct list_head *head);
-extern struct fb_videomode *fb_find_best_mode(struct fb_var_screeninfo *var,
-                                              struct list_head *head);
-extern struct fb_videomode *fb_find_nearest_mode(struct fb_videomode *mode,
-                                                 struct list_head *head);
+extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
+                                                struct list_head *head);
+extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
+                                                    struct list_head *head);
+extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
+                                                       struct list_head *head);
 extern void fb_destroy_modelist(struct list_head *head);
-extern void fb_videomode_to_modelist(struct fb_videomode *modedb, int num,
+extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
                                      struct list_head *head);
-extern struct fb_videomode *fb_find_best_display(struct fb_monspecs *specs,
-                                                 struct list_head *head);
+extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
+                                                       struct list_head *head);
 
 /* drivers/video/fbcmap.c */
 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);