[ Upstream commit437054b1bb] The prototype of __vdso_gettimeofday() uses this struct. However gettime.h's own includes do not provide a definition for it. Add a forward declaration, similar to other used structs. Fixes:42874e4eb3("arch: vdso: consolidate gettime prototypes") Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/all/20250815-vdso-sparc64-generic-2-v2-1-b5ff80672347@linutronix.de Signed-off-by: Sasha Levin <sashal@kernel.org>