  Accretion physics has become more important recently due to the detection of
the first horizon-scale images of the super-massive black holes of M\,87$^*$
and Sgr~A$^*$ by the Event Horizon Telescope (EHT). General relativistic
magnetohydrodynamic (GRMHD) simulations of magnetized accretion flows onto a
Kerr black hole have been used to interpret them. However, further testing the
theory of gravity by using horizon-scale images requires performing consistent
GRMHD simulations in non-Kerr spacetime. In this paper, we revisited the
hydrodynamical equilibrium solution of the Fishbone and Moncrief (FM) torus
that can be used to study any stationary, axisymmetric, vacuum, or non-vacuum
spacetime. Further, we check the stability of the FM torus in non-Kerr
spacetime by general relativistic hydrodynamic simulations. We find that FM
torus in non-Kerr spacetime is indeed stable under long-term evolution. We
conclude that the generalized FM torus solution would be very useful for
creating new GRMHD libraries in extended Kerr black holes.
