Re: [U-Boot] [PATCH 1/2] Move uninitialized_var() macro from ubi_uboot.h to compiler.h

On Tue, Sep 01, 2009 at 08:52:33PM +0200, Albin Tonnerre wrote: [...]

...

...

...

+/* compiler options */ +#define uninitialized_var(x) x = x

Please excuse my ignorance, but where and what for is such a definition useful?

It's used to avoid GCC warnings, i.e. when GCC isn't smart enough to see that some variable isn't actually used uninitialized.

~/linux-2.6$ git grep uninitialized_var drivers/ | wc -l 94

You seem to be grepping the linux source tree.

Yes, which is a great source of best practices.

Thanks,