On Sat, Apr 15, 2006 at 03:06:09PM +0100, pushparaj vitekar wrote:
> hi
Hi,
> can any one explain the likely/unlikely macros
> what is their purpose ,where they should be used?
they give the compiler a strong hint which code path is likely and which
not.
This is useful for hot paths in the kernel and for macros like
BUG_ON() (a bug is unlikely, and if you hit it, performance usually
isn't your biggest problem).
They are _not_ meant for 51:49 situations.
Usually, you won't need them.
> thanks
cu
Adrian
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