  A theoretical study is performed on the entropy $S_{\rm s}$ and the spin
susceptibility $\chi_{\rm s}$ near the upper critical field $H_{c2}$ of s-wave
type-II superconductors with arbitrary impurity concentrations. The changes of
these quantities through $H_{c2}$ may be expressed as $[S_{\rm s}(T,B)-S_{\rm
s}(T,0)]/[S_{\rm n}(T)-S_{\rm s}(T,0)]=1-\alpha_{S}(1-B/H_{c2})\approx
(B/H_{c2})^{\alpha_{S}}$, for example, where $B$ is the average flux density
and $S_{\rm n}$ denotes entropy in the normal state. It is found that the
slopes $\alpha_{S}$ and $\alpha_{\chi}$ at T=0 are identical, connected
directly with the zero-energy density of states, and vary from 1.72 in the
dirty limit to $0.5\sim 0.6$ in the clean limit. This mean-free-path dependence
of $\alpha_{S}$ and $\alpha_{\chi}$ at T=0 is quantitatively the same as that
of the slope $\alpha_{\rho}(T=0)$ for the flux-flow resistivity studied
previously. The result suggests that $S_{\rm s}(B)$ and $\chi_{\rm s}(B)$ near
T=0 are convex downward (upward) in the dirty (clean) limit, deviating
substantially from the linear behavior $\propto B/H_{c2}$. The specific-heat
jump at $H_{c2}$ also shows fairly large mean-free-path dependence.
