rust: alloc: Add realloc and alloc_zeroed to the GlobalAlloc impl
While there are default impls for these methods, using the respective C api's is faster. Currently neither the existing nor these new GlobalAlloc method implementations are actually called. Instead the __rust_* function defined below the GlobalAlloc impl are used. With rustc 1.71 these functions will be gone and all allocation calls will go through the GlobalAlloc implementation. Link: https://github.com/Rust-for-Linux/linux/issues/68Signed-off-by: Björn Roy Baron <bjorn3_gh@protonmail.com> [boqun: add size adjustment for alignment requirement] Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Reviewed-by: Andreas Hindborg <a.hindborg@samsung.com> Link: https://lore.kernel.org/r/20230730012905.643822-4-boqun.feng@gmail.comSigned-off-by: Miguel Ojeda <ojeda@kernel.org>
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