[PATCH 0/5] Kill the BKL in compat ioctl handling

Arnd Bergmann
2009-08-06T13:10:18Z

I noticed that compat_sys_ioctl still holds the big kernel
lock for all ioctl conversion handlers. It would be easy to
push this one level down and only do it where necessary,
but I decided to clean it up some more at the same time
and move all the VT ioctl handling into the specific drivers.

Arnd <><

arch/um: handle compat_ioctl in tty line driver
s390: move keyboard compat ioctls into tty3270 driver
tty: handle VT specific compat ioctls in vt driver
compat_ioctl: remove VT specific ioctl handlers
compat_ioctl: do not hold BKL in handlers

arch/um/drivers/line.c | 6 +
arch/um/drivers/ssl.c | 1 +
arch/um/drivers/stdio_console.c | 1 +
arch/um/include/shared/line.h | 2 +
drivers/char/vt.c | 3 +
drivers/char/vt_ioctl.c | 203 +++++++++++++++++++++++++++++++++++++
drivers/s390/char/tty3270.c | 19 ++++
fs/compat_ioctl.c | 213 ---------------------------------------
include/linux/tty.h | 3 +
9 files changed, 238 insertions(+), 213 deletions(-)