commit c55d240003ae253d3057dcf93510c9bd64bb7a09
author Michael Ellerman <mpe@ellerman.id.au> Tue Nov 15 18:02:32 2016 +1100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Tue Nov 15 19:26:06 2016 +0100
tree c80233dfdea2ba01b6a627fbe9cbc52a45df203c
parent 967b274e02e18c9fbb4d19b96a89bd0afbc77b7a

lkdtm: Prevent the compiler from optimising lkdtm_CORRUPT_STACK()

At least on powerpc with GCC 6, the compiler is smart enough to optimise
lkdtm_CORRUPT_STACK() into an empty function that just returns.

If we print the buffer after we've written to it that prevents the
compiler from optimising away data and the memset().

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>