[PATCH] tty: preparatory structures for termios revamp

In order to sort out our struct termios and add proper speed control we need
to separate the kernel and user termios structures.  Glibc is fine but the
other libraries rely on the kernel exported struct termios and we need to
extend this without breaking the ABI/API

To do so we add a struct ktermios which is the kernel view of a termios
structure and overlaps the struct termios with extra fields on the end for
now.  (That limitation will go away in later patches).  Some platforms (eg
alpha) planned ahead and thus use the same struct for both, others did not.

This just adds the structures but does not use them, it seems a sensible
splitting point for bisect if there are compile failures (not that I expect
them)

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

21 files changed, 229 insertions, 1 deletions

diff --git a/drivers/net/wireless/strip.c b/drivers/net/wireless/strip.c
index 337c692f6fd6..ce3a8bac66ff 100644
--- a/drivers/net/wireless/strip.c
+++ b/drivers/net/wireless/strip.c
@@ -798,7 +798,7 @@ static unsigned int get_baud(struct tty_struct *tty)
  */
 static void set_baud(struct tty_struct *tty, unsigned int baudcode)
 {
-        struct termios old_termios = *(tty->termios);
+        struct ktermios old_termios = *(tty->termios);
         tty->termios->c_cflag &= ~CBAUD;        /* Clear the old baud setting */
         tty->termios->c_cflag |= baudcode;      /* Set the new baud setting */
         tty->driver->set_termios(tty, &old_termios);
diff --git a/include/asm-alpha/termbits.h b/include/asm-alpha/termbits.h
index 5541101b58ae..ad854a4a3af6 100644
--- a/include/asm-alpha/termbits.h
+++ b/include/asm-alpha/termbits.h
@@ -25,6 +25,19 @@ struct termios {
         speed_t c_ospeed;               /* output speed */
 };
 
+/* Alpha has matching termios and ktermios */
+
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_cc[NCCS];                /* control characters */
+        cc_t c_line;                    /* line discipline (== c_cc[19]) */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VEOF 0
 #define VEOL 1
diff --git a/include/asm-arm/termbits.h b/include/asm-arm/termbits.h
index bbc6e1d24d3f..a3f4fe1742d0 100644
--- a/include/asm-arm/termbits.h
+++ b/include/asm-arm/termbits.h
@@ -15,6 +15,18 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-arm26/termbits.h b/include/asm-arm26/termbits.h
index bbc6e1d24d3f..a3f4fe1742d0 100644
--- a/include/asm-arm26/termbits.h
+++ b/include/asm-arm26/termbits.h
@@ -15,6 +15,18 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-avr32/termbits.h b/include/asm-avr32/termbits.h
index 9dc6eacafa33..c215fafdae4d 100644
--- a/include/asm-avr32/termbits.h
+++ b/include/asm-avr32/termbits.h
@@ -17,6 +17,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-cris/termbits.h b/include/asm-cris/termbits.h
index be0836d2f282..8d8cec225fe1 100644
--- a/include/asm-cris/termbits.h
+++ b/include/asm-cris/termbits.h
@@ -19,6 +19,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-frv/termbits.h b/include/asm-frv/termbits.h
index 74f20d6e292f..2d6d389cff49 100644
--- a/include/asm-frv/termbits.h
+++ b/include/asm-frv/termbits.h
@@ -17,6 +17,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-h8300/termbits.h b/include/asm-h8300/termbits.h
index fa69ae00eda3..6a1f4d3807b4 100644
--- a/include/asm-h8300/termbits.h
+++ b/include/asm-h8300/termbits.h
@@ -17,6 +17,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-i386/termbits.h b/include/asm-i386/termbits.h
index 72c10e3190f8..12baf1d6343f 100644
--- a/include/asm-i386/termbits.h
+++ b/include/asm-i386/termbits.h
@@ -17,6 +17,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-ia64/termbits.h b/include/asm-ia64/termbits.h
index b9e843f7dc42..4531a511bde5 100644
--- a/include/asm-ia64/termbits.h
+++ b/include/asm-ia64/termbits.h
@@ -26,6 +26,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-m32r/termbits.h b/include/asm-m32r/termbits.h
index 5ace3702df75..faf2bd0504c1 100644
--- a/include/asm-m32r/termbits.h
+++ b/include/asm-m32r/termbits.h
@@ -19,6 +19,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-m68k/termbits.h b/include/asm-m68k/termbits.h
index e9eec3eb0718..a194092240fb 100644
--- a/include/asm-m68k/termbits.h
+++ b/include/asm-m68k/termbits.h
@@ -17,6 +17,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-mips/termbits.h b/include/asm-mips/termbits.h
index b62ec7c521cc..0bbe07b42a07 100644
--- a/include/asm-mips/termbits.h
+++ b/include/asm-mips/termbits.h
@@ -30,6 +30,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR            0              /* Interrupt character [ISIG].  */
 #define VQUIT            1              /* Quit character [ISIG].  */
diff --git a/include/asm-parisc/termbits.h b/include/asm-parisc/termbits.h
index 372b634892c9..a46e299a9391 100644
--- a/include/asm-parisc/termbits.h
+++ b/include/asm-parisc/termbits.h
@@ -17,6 +17,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-powerpc/termbits.h b/include/asm-powerpc/termbits.h
index 6d533b07aaf5..b572f21b32c4 100644
--- a/include/asm-powerpc/termbits.h
+++ b/include/asm-powerpc/termbits.h
@@ -30,6 +30,19 @@ struct termios {
         speed_t c_ospeed;               /* output speed */
 };
 
+/* For PowerPC the termios and ktermios are the same */
+
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR            0
 #define VQUIT            1
diff --git a/include/asm-s390/termbits.h b/include/asm-s390/termbits.h
index eb3f8bfabf61..585c78a6e407 100644
--- a/include/asm-s390/termbits.h
+++ b/include/asm-s390/termbits.h
@@ -25,6 +25,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-sh/termbits.h b/include/asm-sh/termbits.h
index 4f9822a8e7b4..f1b7b46f4e9a 100644
--- a/include/asm-sh/termbits.h
+++ b/include/asm-sh/termbits.h
@@ -17,6 +17,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-sparc/termbits.h b/include/asm-sparc/termbits.h
index 1794d71134b7..5eb00a105d7c 100644
--- a/include/asm-sparc/termbits.h
+++ b/include/asm-sparc/termbits.h
@@ -31,6 +31,18 @@ struct termios {
 #endif
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        cc_t _x_cc[2];                  /* We need them to hold vmin/vtime */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR    0
 #define VQUIT    1
diff --git a/include/asm-sparc64/termbits.h b/include/asm-sparc64/termbits.h
index b07715273ed4..705cd44b4173 100644
--- a/include/asm-sparc64/termbits.h
+++ b/include/asm-sparc64/termbits.h
@@ -33,6 +33,18 @@ struct termios {
 #endif
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        cc_t _x_cc[2];                  /* We need them to hold vmin/vtime */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR    0
 #define VQUIT    1
diff --git a/include/asm-v850/termbits.h b/include/asm-v850/termbits.h
index 212d4e279263..f3b433032089 100644
--- a/include/asm-v850/termbits.h
+++ b/include/asm-v850/termbits.h
@@ -17,6 +17,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1
diff --git a/include/asm-x86_64/termbits.h b/include/asm-x86_64/termbits.h
index bd950946e52c..f31918cea510 100644
--- a/include/asm-x86_64/termbits.h
+++ b/include/asm-x86_64/termbits.h
@@ -17,6 +17,17 @@ struct termios {
         cc_t c_cc[NCCS];                /* control characters */
 };
 
+struct ktermios {
+        tcflag_t c_iflag;               /* input mode flags */
+        tcflag_t c_oflag;               /* output mode flags */
+        tcflag_t c_cflag;               /* control mode flags */
+        tcflag_t c_lflag;               /* local mode flags */
+        cc_t c_line;                    /* line discipline */
+        cc_t c_cc[NCCS];                /* control characters */
+        speed_t c_ispeed;               /* input speed */
+        speed_t c_ospeed;               /* output speed */
+};
+
 /* c_cc characters */
 #define VINTR 0
 #define VQUIT 1