Messages in this thread | | | Date | Mon, 2 Jul 2007 04:27:59 +0200 | From | Adrian Bunk <> | Subject | Re: [-mm patch] unionfs: make functions static |
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On Sun, Jul 01, 2007 at 09:42:49PM -0400, Josef Sipek wrote: > On Sun, Jul 01, 2007 at 10:23:30PM +0200, Adrian Bunk wrote: > > This patch makes some needlessly global functions static. > > > ... > > --- linux-2.6.22-rc6-mm1/fs/unionfs/lookup.c.old 2007-07-01 00:05:02.000000000 +0200 > > +++ linux-2.6.22-rc6-mm1/fs/unionfs/lookup.c 2007-07-01 00:06:05.000000000 +0200 > > @@ -18,6 +18,8 @@ > > > > #include "union.h" > > > > +static int realloc_dentry_private_data(struct dentry *dentry); > > + > > /* is the filename valid == !(whiteout for a file or opaque dir marker) */ > > I forget who said it, but someone wasn't very happy with prototypes like > that in .c files. What's the prefered way - are they ok for static symbols?
It might have even been me who said this - but about global functions.
For global functions, prototypes in header files allow gcc to check whether the prototype matches the actual function. With a prototype in the C file of the caller that's not possible, and if they are different it can result in nasty runtime errors.
For static functions that's not an issue since gcc sees both the prototype and the actual function.
> Josef "Jeff" Sipek.
cu Adrian
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