x86/uaccess: Remove __get_user() and __put_user()

Nothing that builds on x86 uses __get_user() or __put_user() any more.
They were the "unchecked" user accessors: no range check, on the
assumption that the caller had already done an access_ok().  That
stopped buying anything once every user access had to be enabled and
disabled on its own, and on x86 __get_user() had become slower than
get_user(), since it does an lfence where get_user() checks the address
with a couple of plain instructions.  Several of the last users were
also relying on them for things they were never meant to do: accessing
kernel addresses, or staying quiet in atomic context.

Remove the macros and the out-of-line __{get,put}_user_nocheck_N helpers
behind them, so that new users cannot appear.

Other architectures still provide their own versions.  UML gets its
accessors from asm-generic and is not affected.  arm64's __get_user()
and __put_user() have always been the same as get_user() and put_user(),
so there is no hurry there.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

0 files changed, 0 insertions, 0 deletions