arm64: remove current_top_of_stack()

We no longer use current_top_of_stack() on arm64, so it can be removed.

We introduced current_top_of_stack() for STACKLEAK in commit:

  0b3e336601b82c6a ("arm64: Add support for STACKLEAK gcc plugin")

... then we figured out the intended semantics were unclear, and
reworked it in commit:

  e85094c31ddb794a ("arm64: stackleak: fix current_top_of_stack()")

... then we removed the only user in commit:

  0cfa2ccd285d98ad ("stackleak: rework stack high bound handling")

Given that it's no longer used, and it's very easy to misuse, this patch
removes current_top_of_stack(). For the moment, on_thread_stack() is
left where it is as moving it will change some header dependencies.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Will Deacon <[email protected]>
Reviewed-by: Kees Cook <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Will Deacon <[email protected]>

0 files changed, 0 insertions, 0 deletions