On Sat, 22 Sep 2012 08:50:21 +0800, Fengguang Wu wrote:

FYI, kernel build failed on

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
tty-next
head:   ac57e7f38ea6fe7358cd0b7a2f2d21aef5ab70cd
commit: 84c3b84860440a9e3a3666c14112f41311b8f623 [10/16]
  compat_ioctl: Add RS-485 IOCTLs to the list
config: mips-fuloong2e_defconfig

All related error/warning messages:

fs/compat_ioctl.c:869:1: error: 'TIOCSRS485' undeclared here (not in
  a function)
fs/compat_ioctl.c:870:1: error: 'TIOCGRS485' undeclared here (not in
  a function)

I could fix this by defining these IOCTLs for all architectures that
don't have them yet, but I'm unsure of what values to give them or why
MIPS isn't using 'include/asm-generic/ioctls.h'.

Perhaps it is better to leave adding those IOCTLs up to those who add
the first RS-485 capable driver for that platform and to wrap the use
of these defines in compat_ioctl.c with #ifdefs, as I've done in this
patch. What do you think is best?

Cheers,
Jaeden Amero

Jaeden Amero (1):
  compat_ioctl: Avoid using undefined RS-485 IOCTLs

 fs/compat_ioctl.c | 4 ++++
 1 file changed, 4 insertions(+)

-- 
1.7.12