make `impl_has_work` compatible with more complex generics

The impl_has_work macro only supports idents as generic arguments:

macro_rules! impl_has_work {
    ($(impl$(<$($implarg:ident),*>)?
       HasWork<$work_type:ty $(, $id:tt)?>
       for $self:ident $(<$($selfarg:ident),*>)?
       { self.$field:ident }
    )*) => {$(

There is a workaround, see Alice's linked list patch:

    macro_rules! impl_list_item {
        (
            impl$({$($generics:tt)*})? ListItem<$num:tt> for $t:ty {
                using ListLinks;
            } $($rest:tt)*
        ) => {

Make the impl_has_work macro compatible with more complex generics such as lifetimes and const generic arguments.

This requires submitting a proper patch to the LKML and the Rust for Linux mailing list. Please recall to test your changes, to use a proper title for the commit, to sign your commit under the Developer's Certificate of Origin and so on. Please see https://docs.kernel.org/process/submitting-patches.html and https://rust-for-linux.com/contributing for details.

Please take this issue only if you are new to the kernel development process and you would like to use it as a test to submit your first patch to the kernel. Please do not take it if you do not plan to make other contributions to the kernel.

Rust-for-Linux / linux

make `impl_has_work` compatible with more complex generics #1077