Messages in this thread | | | Date | Mon, 6 Jan 2003 10:56:34 -0500 (EST) | From | "Richard B. Johnson" <> | Subject | Re: Why do some net drivers require __OPTIMIZE__? |
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On 6 Jan 2003, Robert Love wrote:
> On Mon, 2003-01-06 at 10:04, Richard B. Johnson wrote: > > > You need to optimize in order enable inline code generation. It is > > essential to use in-line code in many places because, if the compiler > > actually calls these functions they would have to be protected > > from reentry. > > I do not think this is correct. > > Concurrency concerns would not change wrt calling the function vs. > inlining it. > > More likely some code, i.e. asm, just assumes inlining is taking place. > > Robert Love >
When you call a function, that function gets a copy of the parameters passed to it. In-line code accesses those parameters directly. That's why the spin-lock code, for instance, won't work (with the current macros) unless they are in-lined.
Cheers, Dick Johnson Penguin : Linux version 2.4.18 on an i686 machine (797.90 BogoMips). Why is the government concerned about the lunatic fringe? Think about it.
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