tree b0b2a51b07e944497da5cb48fb461963a3762cad
parent 9026843952adac5b123c7b8dc961e5c15828d9e1
author Al Viro <viro@zeniv.linux.org.uk> 1353439466 -0500
committer Al Viro <viro@zeniv.linux.org.uk> 1355958461 -0500

new helpers: __save_altstack/__compat_save_altstack, switch x86 and um to those

note that they are relying on access_ok() already checked by caller.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>