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SubjectRe: [PATCH 1/19] MUTEX: Introduce simple mutex implementation
> - i introduced a 'type-sensitive' macro wrapper that switches down() 
> (and the other APIs) to either to the assembly variant (if the
> variable's type is struct compat_semaphore), or switches it to the new
> generic mutex (if the type is struct semaphore), at build-time. There
> is no runtime overhead due to this build-time-switching.

Didn't that drop compatibility with 2.95? The necessary builtins
are only in 3.x.

Not that I'm not in favour - I would like to use C99 everywhere
and it would get of the ugly spinlock workaround for i386
and x86-64 doesn't support earlier compilers anyways -
but others might not agree.

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