Commits
![Al Viro](https://secure.gravatar.com/avatar/b1fecf6b03fc62f894bef52b49551915.jpg?s=96&d=mm)
Al Viro committed 1ca97bb541a
new helper: current_user_stack_pointer() Cross-architecture equivalent of rdusp(); default is user_stack_pointer(current_pt_regs()) - that works for almost all platforms that have usp saved in pt_regs. The only exception from that is ia64 - we want memory stack, not the backing store for register one. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>