`struct console_font` is a UAPI structure, thus ideally should not be
used for kernel internal abstraction. Remove some dummy .con_font_set,
.con_font_default and .con_font_copy `struct consw` callback
implementations, to make it cleaner.

Patch "fbcon: Prevent global-out-of-bounds read in fbcon_copy_font()"
depends on this patch, so Cc: stable.

Cc: sta...@vger.kernel.org
Suggested-by: Daniel Vetter <dan...@ffwll.ch>
Signed-off-by: Peilin Ye <yepeilin...@gmail.com>
---
Context: 
https://lore.kernel.org/lkml/CAKMK7uFY2zv0adjKJ_ORVFT7Zzwn075MaU0rEU7_FuqENLR=u...@mail.gmail.com/

 drivers/usb/misc/sisusbvga/sisusb_con.c | 21 ---------------------
 drivers/video/console/dummycon.c        | 20 --------------------
 2 files changed, 41 deletions(-)

diff --git a/drivers/usb/misc/sisusbvga/sisusb_con.c 
b/drivers/usb/misc/sisusbvga/sisusb_con.c
index c63e545fb105..dfa0d5ce6012 100644
--- a/drivers/usb/misc/sisusbvga/sisusb_con.c
+++ b/drivers/usb/misc/sisusbvga/sisusb_con.c
@@ -1345,24 +1345,6 @@ static int sisusbdummycon_blank(struct vc_data *vc, int 
blank, int mode_switch)
        return 0;
 }
 
-static int sisusbdummycon_font_set(struct vc_data *vc,
-                                  struct console_font *font,
-                                  unsigned int flags)
-{
-       return 0;
-}
-
-static int sisusbdummycon_font_default(struct vc_data *vc,
-                                      struct console_font *font, char *name)
-{
-       return 0;
-}
-
-static int sisusbdummycon_font_copy(struct vc_data *vc, int con)
-{
-       return 0;
-}
-
 static const struct consw sisusb_dummy_con = {
        .owner =                THIS_MODULE,
        .con_startup =          sisusbdummycon_startup,
@@ -1375,9 +1357,6 @@ static const struct consw sisusb_dummy_con = {
        .con_scroll =           sisusbdummycon_scroll,
        .con_switch =           sisusbdummycon_switch,
        .con_blank =            sisusbdummycon_blank,
-       .con_font_set =         sisusbdummycon_font_set,
-       .con_font_default =     sisusbdummycon_font_default,
-       .con_font_copy =        sisusbdummycon_font_copy,
 };
 
 int
diff --git a/drivers/video/console/dummycon.c b/drivers/video/console/dummycon.c
index 2a0d0bda7faa..f1711b2f9ff0 100644
--- a/drivers/video/console/dummycon.c
+++ b/drivers/video/console/dummycon.c
@@ -124,23 +124,6 @@ static int dummycon_switch(struct vc_data *vc)
        return 0;
 }
 
-static int dummycon_font_set(struct vc_data *vc, struct console_font *font,
-                            unsigned int flags)
-{
-       return 0;
-}
-
-static int dummycon_font_default(struct vc_data *vc,
-                                struct console_font *font, char *name)
-{
-       return 0;
-}
-
-static int dummycon_font_copy(struct vc_data *vc, int con)
-{
-       return 0;
-}
-
 /*
  *  The console `switch' structure for the dummy console
  *
@@ -159,8 +142,5 @@ const struct consw dummy_con = {
        .con_scroll =   dummycon_scroll,
        .con_switch =   dummycon_switch,
        .con_blank =    dummycon_blank,
-       .con_font_set = dummycon_font_set,
-       .con_font_default =     dummycon_font_default,
-       .con_font_copy =        dummycon_font_copy,
 };
 EXPORT_SYMBOL_GPL(dummy_con);
-- 
2.25.1

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