arm64: simplify access_ok()

arm64 has an inline asm implementation of access_ok() that is derived from
the 32-bit arm version and optimized for the case that both the limit and
the size are variable. With set_fs() gone, the limit is always constant,
and the size usually is as well, so just using the default implementation
reduces the check into a comparison against a constant that can be
scheduled by the compiler.

On a defconfig build, this saves over 28KB of .text.

Acked-by: Robin Murphy <[email protected]>
Acked-by: Mark Rutland <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

0 files changed, 0 insertions, 0 deletions