From: "H. Peter Anvin (Intel)" <[email protected]> It turns out that Alpha is the only architecture that never implemented BOTHER and IBSHIFT, which is otherwise ages old. This is one thing that has held up glibc support for this feature (all other architectures have supported these for about a decade, at least before the current 3.2 glibc cutoff.)
Furthermore, in the process of dealing with this, I discovered that the current code in tty_baudrate.c can read past the end of the baud_table[] on Alpha and PowerPC. The second patch in this series fixes that, but it also cleans up the code substantially by auto-generating the table and, since all architectures now have them, removing all conditionals for BOTHER and IBSHIFT existing. Tagging for stable because these are concrete problems. I have a much bigger update in process, nearly done, which will clean up a lot of duplicated code and make the uapi headers usable for libc, but that is not critical on the same level. Tested on x86, compile-tested on Alpha. Signed-off-by: H. Peter Anvin (Intel) <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Jiri Slaby <[email protected]> Cc: Al Viro <[email protected]> Cc: Richard Henderson <[email protected]> Cc: Ivan Kokshaysky <[email protected]> Cc: Matt Turner <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Kate Stewart <[email protected]> Cc: Philippe Ombredanne <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Eugene Syromiatnikov <[email protected]> Cc: <[email protected]> Cc: <[email protected]> Cc: Johan Hovold <[email protected]> Cc: Alan Cox <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: <[email protected]> --- arch/alpha/include/asm/termios.h | 8 +- arch/alpha/include/uapi/asm/ioctls.h | 5 + arch/alpha/include/uapi/asm/termbits.h | 17 +++ drivers/tty/.gitignore | 1 + drivers/tty/Makefile | 16 +++ drivers/tty/bmacros.c | 2 + drivers/tty/tty_baudrate.c | 190 +++++++++++++-------------------- 7 files changed, 122 insertions(+), 117 deletions(-)
