On Wed, Aug 19, 2020 at 02:40:01PM +0300, Leon Romanovsky wrote: > On Wed, Aug 19, 2020 at 12:34:24PM +0100, Matthew Wilcox wrote: > > On Wed, Aug 19, 2020 at 11:32:59AM +0300, Leon Romanovsky wrote: > > > From: Leon Romanovsky <[email protected]> > > > > > > The simple_dname() is declared in internal header file as extern > > > and this generates the following GCC warning. > > > > The fact that it's declared as extern doesn't matter. You don't need > > the change to internal.h at all. The use of 'extern' on a function > > declaration is purely decorative: > > > > 5 If the declaration of an identifier for a function has no > > storage-class specifier, its linkage is determined exactly as if it > > were declared with the storage-class specifier extern. > > So why do we need to keep extern keyword if we use intenral.h directly?
We don't. It's just personal preference. I don't use extern keywords on function declarations anywhere, but Al does and it's rude to change it.
