termios: consolidate values for VDISCARD in INIT_C_CC

On old systems it used to be ^O.  Linux had never actually used
the value, but INIT_C_CC (on i386) did initialize it to ^O;
unfortunately, it had a typo in the comment claiming that to be
^U.  Most of the architectures copied the (correct) definition
along with mistaken comment.  alpha, powerpc and sparc tried
to make the definition match comment.

However, util-linux still resets it to ^O on any architecture,
^O is the historical value, kernel ignores it anyway and finally,
Linus said "Just change everybody to do the same, nobody cares
about VDISCARD".

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/YxDmy//MKzs3ye7l@ZenIV
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/alpha/include/asm/termios.h b/arch/alpha/include/asm/termios.h
index 17b1098..9cc784d 100644 (file)
--- a/arch/alpha/include/asm/termios.h
+++ b/arch/alpha/include/asm/termios.h
@@ -8,9 +8,9 @@
 /*     eof=^D          eol=\0          eol2=\0         erase=del
        werase=^W       kill=^U         reprint=^R      sxtc=\0
        intr=^C         quit=^\         susp=^Z         <OSF/1 VDSUSP>
-       start=^Q        stop=^S         lnext=^V        discard=^U
+       start=^Q        stop=^S         lnext=^V        discard=^O
        vmin=\1         vtime=\0
 */
-#define INIT_C_CC "\004\000\000\177\027\025\022\000\003\034\032\000\021\023\026\025\001\000"
+#define INIT_C_CC "\004\000\000\177\027\025\022\000\003\034\032\000\021\023\026\017\001\000"
 
 #endif /* _ALPHA_TERMIOS_H */

diff --git a/arch/mips/include/asm/termios.h b/arch/mips/include/asm/termios.h
index dbb6233..059c800 100644 (file)
--- a/arch/mips/include/asm/termios.h
+++ b/arch/mips/include/asm/termios.h
@@ -16,7 +16,7 @@
  *     intr=^C         quit=^\         erase=del       kill=^U
  *     vmin=\1         vtime=\0        eol2=\0         swtc=\0
  *     start=^Q        stop=^S         susp=^Z         vdsusp=
- *     reprint=^R      discard=^U      werase=^W       lnext=^V
+ *     reprint=^R      discard=^O      werase=^W       lnext=^V
  *     eof=^D          eol=\0
  */
 #define INIT_C_CC "\003\034\177\025\1\0\0\0\021\023\032\0\022\017\027\026\004\0"

diff --git a/arch/powerpc/include/asm/termios.h b/arch/powerpc/include/asm/termios.h
index 5c00332..e18a05a 100644 (file)
--- a/arch/powerpc/include/asm/termios.h
+++ b/arch/powerpc/include/asm/termios.h
@@ -10,7 +10,7 @@
 
 #include <uapi/asm/termios.h>
 
-/*                   ^C  ^\ del  ^U  ^D   1   0   0   0   0  ^W  ^R  ^Z  ^Q  ^S  ^V  ^U  */
-#define INIT_C_CC "\003\034\177\025\004\001\000\000\000\000\027\022\032\021\023\026\025" 
+/*                   ^C  ^\ del  ^U  ^D   1   0   0   0   0  ^W  ^R  ^Z  ^Q  ^S  ^V  ^O  */
+#define INIT_C_CC "\003\034\177\025\004\001\000\000\000\000\027\022\032\021\023\026\017"
 
 #endif /* _ASM_POWERPC_TERMIOS_H */

diff --git a/arch/sparc/include/asm/termios.h b/arch/sparc/include/asm/termios.h
index bafd776..60f9046 100644 (file)
--- a/arch/sparc/include/asm/termios.h
+++ b/arch/sparc/include/asm/termios.h
@@ -9,9 +9,9 @@
 /*     intr=^C         quit=^\         erase=del       kill=^U
        eof=^D          eol=\0          eol2=\0         sxtc=\0
        start=^Q        stop=^S         susp=^Z         dsusp=^Y
-       reprint=^R      discard=^U      werase=^W       lnext=^V
+       reprint=^R      discard=^O      werase=^W       lnext=^V
        vmin=\1         vtime=\0
 */
-#define INIT_C_CC "\003\034\177\025\004\000\000\000\021\023\032\031\022\025\027\026\001"
+#define INIT_C_CC "\003\034\177\025\004\000\000\000\021\023\032\031\022\017\027\026\001"
 
 #endif /* _SPARC_TERMIOS_H */

diff --git a/include/linux/termios_internal.h b/include/linux/termios_internal.h
index 103ca03..7eb3598 100644 (file)
--- a/include/linux/termios_internal.h
+++ b/include/linux/termios_internal.h
@@ -9,7 +9,7 @@
 /*     intr=^C         quit=^\         erase=del       kill=^U
        eof=^D          vtime=\0        vmin=\1         sxtc=\0
        start=^Q        stop=^S         susp=^Z         eol=\0
-       reprint=^R      discard=^U      werase=^W       lnext=^V
+       reprint=^R      discard=^O      werase=^W       lnext=^V
        eol2=\0
 */
 #define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"