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DateTue, 13 Dec 2005 09:02:19 +0000
FromChristoph Hellwig <>
SubjectRe: [PATCH 1/19] MUTEX: Introduce simple mutex implementation
On Tue, Dec 13, 2005 at 08:54:41AM +0100, Ingo Molnar wrote:
> - i did not touch the 'struct semaphore' namespace, but introduced a
>   'struct compat_semaphore'.

Because it's totally brindead.  Your compat_semaphore is a real semaphore
and your semaphore is a mutex.  So name them as such.

> - 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.

And this one is probably is a great help to win the obsfucated C contests,
but otherwise just harmfull.

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