1 files changed, 13 insertions, 6 deletions

diff --git a/include/uapi/linux/tty_flags.h b/include/uapi/linux/tty_flags.h
index eefcb483a2c0..fae4864737fa 100644
--- a/include/uapi/linux/tty_flags.h
+++ b/include/uapi/linux/tty_flags.h
@@ -6,27 +6,31 @@
  * shared by the tty_port flags structures.
  *
  * Define ASYNCB_* for convenient use with {test,set,clear}_bit.
+ *
+ * Bits [0..ASYNCB_LAST_USER] are userspace defined/visible/changeable
+ * [x] in the bit comments indicates the flag is defunct and no longer used.
  */
 #define ASYNCB_HUP_NOTIFY        0 /* Notify getty on hangups and closes
                                     * on the callout port */
 #define ASYNCB_FOURPORT          1 /* Set OU1, OUT2 per AST Fourport settings */
 #define ASYNCB_SAK               2 /* Secure Attention Key (Orange book) */
-#define ASYNCB_SPLIT_TERMIOS     3 /* Separate termios for dialin/callout */
+#define ASYNCB_SPLIT_TERMIOS     3 /* [x] Separate termios for dialin/callout */
 #define ASYNCB_SPD_HI            4 /* Use 56000 instead of 38400 bps */
 #define ASYNCB_SPD_VHI           5 /* Use 115200 instead of 38400 bps */
 #define ASYNCB_SKIP_TEST         6 /* Skip UART test during autoconfiguration */
 #define ASYNCB_AUTO_IRQ          7 /* Do automatic IRQ during
                                     * autoconfiguration */
-#define ASYNCB_SESSION_LOCKOUT   8 /* Lock out cua opens based on session */
-#define ASYNCB_PGRP_LOCKOUT      9 /* Lock out cua opens based on pgrp */
-#define ASYNCB_CALLOUT_NOHUP    10 /* Don't do hangups for cua device */
+#define ASYNCB_SESSION_LOCKOUT   8 /* [x] Lock out cua opens based on session */
+#define ASYNCB_PGRP_LOCKOUT      9 /* [x] Lock out cua opens based on pgrp */
+#define ASYNCB_CALLOUT_NOHUP    10 /* [x] Don't do hangups for cua device */
 #define ASYNCB_HARDPPS_CD       11 /* Call hardpps when CD goes high  */
 #define ASYNCB_SPD_SHI          12 /* Use 230400 instead of 38400 bps */
 #define ASYNCB_LOW_LATENCY      13 /* Request low latency behaviour */
 #define ASYNCB_BUGGY_UART       14 /* This is a buggy UART, skip some safety
                                     * checks.  Note: can be dangerous! */
-#define ASYNCB_AUTOPROBE        15 /* Port was autoprobed by PCI or PNP code */
-#define ASYNCB_LAST_USER        15
+#define ASYNCB_AUTOPROBE        15 /* [x] Port was autoprobed by PCI/PNP code */
+#define ASYNCB_MAGIC_MULTIPLIER 16 /* Use special CLK or divisor */
+#define ASYNCB_LAST_USER        16
 
 /* Internal flags used only by kernel */
 #define ASYNCB_INITIALIZED      31 /* Serial port was initialized */
@@ -57,8 +61,11 @@
 #define ASYNC_LOW_LATENCY       (1U << ASYNCB_LOW_LATENCY)
 #define ASYNC_BUGGY_UART        (1U << ASYNCB_BUGGY_UART)
 #define ASYNC_AUTOPROBE         (1U << ASYNCB_AUTOPROBE)
+#define ASYNC_MAGIC_MULTIPLIER  (1U << ASYNCB_MAGIC_MULTIPLIER)
 
 #define ASYNC_FLAGS             ((1U << (ASYNCB_LAST_USER + 1)) - 1)
+#define ASYNC_DEPRECATED        (ASYNC_SESSION_LOCKOUT | ASYNC_PGRP_LOCKOUT | \
+                ASYNC_CALLOUT_NOHUP | ASYNC_AUTOPROBE)
 #define ASYNC_USR_MASK          (ASYNC_SPD_MASK|ASYNC_CALLOUT_NOHUP| \
                 ASYNC_LOW_LATENCY)
 #define ASYNC_SPD_CUST          (ASYNC_SPD_HI|ASYNC_SPD_VHI)