Merge tag 'tty-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial driver updates from Greg KH:
 "Here is the big tty and serial driver pull request for 4.19-rc1.

  It's not all that big, just a number of small serial driver updates
  and fixes, along with some better vt handling for unicode characters
  for those using braille terminals.

  All of these patches have been in linux-next for a long time with no
  reported issues"

* tag 'tty-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (73 commits)
  tty: serial: 8250: Revert NXP SC16C2552 workaround
  serial: 8250_exar: Read INT0 from slave device, too
  tty: rocket: Fix possible buffer overwrite on register_PCI
  serial: 8250_dw: Add ACPI support for uart on Broadcom SoC
  serial: 8250_dw: always set baud rate in dw8250_set_termios
  dt-bindings: serial: Add binding for uartlite
  tty: serial: uartlite: Add support for suspend and resume
  tty: serial: uartlite: Add clock adaptation
  tty: serial: uartlite: Add structure for private data
  serial: sh-sci: Improve support for separate TEI and DRI interrupts
  serial: sh-sci: Remove SCIx_RZ_SCIFA_REGTYPE
  serial: sh-sci: Allow for compressed SCIF address
  serial: sh-sci: Improve interrupts description
  serial: 8250: Use cached port name directly in messages
  serial: 8250_exar: Drop unused variable in pci_xr17v35x_setup()
  vt: drop unused struct vt_struct
  vt: avoid a VLA in the unicode screen scroll function
  vt: add /dev/vcsu* to devices.txt
  vt: coherence validation code for the unicode screen buffer
  vt: selection: take screen contents from uniscr if available
  ...

6 files changed, 43 insertions, 5 deletions

diff --git a/include/linux/console_struct.h b/include/linux/console_struct.h
index c0ec478ea5bf..fea64f2692a0 100644
--- a/include/linux/console_struct.h
+++ b/include/linux/console_struct.h
@@ -17,8 +17,8 @@
 #include <linux/vt.h>
 #include <linux/workqueue.h>
 
-struct vt_struct;
 struct uni_pagedir;
+struct uni_screen;
 
 #define NPAR 16
 
@@ -140,6 +140,7 @@ struct vc_data {
 	struct vc_data **vc_display_fg;		/* [!] Ptr to var holding fg console for this display */
 	struct uni_pagedir *vc_uni_pagedir;
 	struct uni_pagedir **vc_uni_pagedir_loc; /* [!] Location of uni_pagedir variable for this console */
+	struct uni_screen *vc_uni_screen;	/* unicode screen content */
 	bool vc_panic_force_write; /* when oops/panic this VC can accept forced output/blanking */
 	/* additional information is in vt_kern.h */
 };
@@ -148,7 +149,7 @@ struct vc {
 	struct vc_data *d;
 	struct work_struct SAK_work;
 
-	/* might add  scrmem, vt_struct, kbd  at some time,
+	/* might add  scrmem, kbd  at some time,
 	   to have everything in one place - the disadvantage
 	   would be that vc_cons etc can no longer be static */
 };
diff --git a/include/linux/selection.h b/include/linux/selection.h
index 5b278ce99d8d..a8f5b97b216f 100644
--- a/include/linux/selection.h
+++ b/include/linux/selection.h
@@ -32,6 +32,7 @@ extern unsigned char default_blu[];
 
 extern unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed);
 extern u16 screen_glyph(struct vc_data *vc, int offset);
+extern u32 screen_glyph_unicode(struct vc_data *vc, int offset);
 extern void complement_pos(struct vc_data *vc, int offset);
 extern void invert_screen(struct vc_data *vc, int offset, int count, int shift);
 
@@ -42,4 +43,9 @@ extern u16 vcs_scr_readw(struct vc_data *vc, const u16 *org);
 extern void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org);
 extern void vcs_scr_updated(struct vc_data *vc);
 
+extern int vc_uniscr_check(struct vc_data *vc);
+extern void vc_uniscr_copy_line(struct vc_data *vc, void *dest, int viewed,
+				unsigned int row, unsigned int col,
+				unsigned int nr);
+
 #endif
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index 76b9db71e489..18e21427bce4 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -160,6 +160,9 @@ extern void serial8250_do_shutdown(struct uart_port *port);
 extern void serial8250_do_pm(struct uart_port *port, unsigned int state,
 			     unsigned int oldstate);
 extern void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl);
+extern void serial8250_do_set_divisor(struct uart_port *port, unsigned int baud,
+				      unsigned int quot,
+				      unsigned int quot_frac);
 extern int fsl8250_handle_irq(struct uart_port *port);
 int serial8250_handle_irq(struct uart_port *port, unsigned int iir);
 unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr);
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 06ea4eeb09ab..406edae44ca3 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -127,6 +127,13 @@ struct uart_port {
 					     struct ktermios *);
 	unsigned int		(*get_mctrl)(struct uart_port *);
 	void			(*set_mctrl)(struct uart_port *, unsigned int);
+	unsigned int		(*get_divisor)(struct uart_port *,
+					       unsigned int baud,
+					       unsigned int *frac);
+	void			(*set_divisor)(struct uart_port *,
+					       unsigned int baud,
+					       unsigned int quot,
+					       unsigned int quot_frac);
 	int			(*startup)(struct uart_port *port);
 	void			(*shutdown)(struct uart_port *port);
 	void			(*throttle)(struct uart_port *port);
diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h
index 1ef64d4ad887..840894ca3fc0 100644
--- a/include/linux/tty_ldisc.h
+++ b/include/linux/tty_ldisc.h
@@ -119,13 +119,13 @@
 
 #include <linux/fs.h>
 #include <linux/wait.h>
-
+#include <linux/atomic.h>
 
 /*
  * the semaphore definition
  */
 struct ld_semaphore {
-	long			count;
+	atomic_long_t		count;
 	raw_spinlock_t		wait_lock;
 	unsigned int		wait_readers;
 	struct list_head	read_wait;
diff --git a/include/uapi/linux/keyboard.h b/include/uapi/linux/keyboard.h
index ab4108c83186..4846716e7c5c 100644
--- a/include/uapi/linux/keyboard.h
+++ b/include/uapi/linux/keyboard.h
@@ -357,8 +357,29 @@
 #define K_DTILDE	K(KT_DEAD,3)
 #define K_DDIERE	K(KT_DEAD,4)
 #define K_DCEDIL	K(KT_DEAD,5)
+#define K_DMACRON	K(KT_DEAD,6)
+#define K_DBREVE	K(KT_DEAD,7)
+#define K_DABDOT	K(KT_DEAD,8)
+#define K_DABRING	K(KT_DEAD,9)
+#define K_DDBACUTE	K(KT_DEAD,10)
+#define K_DCARON	K(KT_DEAD,11)
+#define K_DOGONEK	K(KT_DEAD,12)
+#define K_DIOTA		K(KT_DEAD,13)
+#define K_DVOICED	K(KT_DEAD,14)
+#define K_DSEMVOICED	K(KT_DEAD,15)
+#define K_DBEDOT	K(KT_DEAD,16)
+#define K_DHOOK		K(KT_DEAD,17)
+#define K_DHORN		K(KT_DEAD,18)
+#define K_DSTROKE	K(KT_DEAD,19)
+#define K_DABCOMMA	K(KT_DEAD,20)
+#define K_DABREVCOMMA	K(KT_DEAD,21)
+#define K_DDBGRAVE	K(KT_DEAD,22)
+#define K_DINVBREVE	K(KT_DEAD,23)
+#define K_DBECOMMA	K(KT_DEAD,24)
+#define K_DCURRENCY	K(KT_DEAD,25)
+#define K_DGREEK	K(KT_DEAD,26)
 
-#define NR_DEAD		6
+#define NR_DEAD		27
 
 #define K_DOWN		K(KT_CUR,0)
 #define K_LEFT		K(KT_CUR,1)