xen: Fix annoying compile-time warning

Commit cb6b6df111e4 ("xen/pv-on-hvm kexec: add quirk for Xen 3.4 and
shutdown watches.") added the xen_strict_xenbus_quirk() function with an
old K&R-style declaration without proper typing, causing gcc to rightly
complain:

  drivers/xen/xenbus/xenbus_xs.c:628:13: warning: function declaration isn’t a prototype [-Wstrict-prototypes]

because we really don't live in caves using stone-age tools any more,
and the kernel has always used properly typed ANSI C function
declarations.

So if a function doesn't take arguments, we tell the compiler so
explicitly by adding the proper "void" in the prototype.

I'm sure there are tons of other examples of this kind of stuff in the
tree, but this is the one that hits my workstation config, so..

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/xen/xenbus/xenbus_xs.c b/drivers/xen/xenbus/xenbus_xs.c
index 48220e129f854435292065c5e928f95d982a4ad3..f5dda83ad7a55048256f29ab79756c092450c08f 100644 (file)
--- a/drivers/xen/xenbus/xenbus_xs.c
+++ b/drivers/xen/xenbus/xenbus_xs.c
@@ -625,7 +625,7 @@ static struct xenbus_watch *find_watch(const char *token)
  * so if we are running on anything older than 4 do not attempt to read
  * control/platform-feature-xs_reset_watches.
  */
-static bool xen_strict_xenbus_quirk()
+static bool xen_strict_xenbus_quirk(void)
 {
        uint32_t eax, ebx, ecx, edx, base;