sigaltstack: support SS_AUTODISARM for CONFIG_COMPAT

Currently SS_AUTODISARM is not supported in compatibility mode, but does
not return -EINVAL either.  This makes dosemu built with -m32 on x86_64
to crash.  Also the kernel's sigaltstack selftest fails if compiled with
-m32.

This patch adds the needed support.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Stas Sergeev <[email protected]>
Cc: Milosz Tanski <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Al Viro <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Nicolas Pitre <[email protected]>
Cc: Waiman Long <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Dmitry Safonov <[email protected]>
Cc: Wang Xiaoqiang <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions