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vdso/timens: Always provide arch_get_vdso_data() prototype for vdso

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The arch_get_vdso_data() function is defined separately on each architecture,
but only called when CONFIG_TIME_NS is set. If the definition is a global
function, this causes a W=1 warning without TIME_NS:

arch/x86/entry/vdso/vma.c:35:19: error: no previous prototype for 'arch_get_vdso_data' [-Werror=missing-prototypes]

Move the prototype out of the #ifdef block to reliably turn off that
warning.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230517131102.934196-15-arnd@kernel.org
This commit is contained in:
Arnd Bergmann 2023-05-17 15:11:02 +02:00 committed by Thomas Gleixner
parent 7877cb91f1
commit b7a7ce1bb7
1 changed files with 2 additions and 1 deletions
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3
include/linux/time_namespace.h
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@ -44,7 +44,6 @@ struct time_namespace *copy_time_ns(unsigned long flags,
struct time_namespace *old_ns);
void free_time_ns(struct time_namespace *ns);
void timens_on_fork(struct nsproxy *nsproxy, struct task_struct *tsk);
struct vdso_data *arch_get_vdso_data(void *vvar_page);
struct page *find_timens_vvar_page(struct vm_area_struct *vma);
static inline void put_time_ns(struct time_namespace *ns)
@ -163,4 +162,6 @@ static inline ktime_t timens_ktime_to_host(clockid_t clockid, ktime_t tim)
}
#endif
struct vdso_data *arch_get_vdso_data(void *vvar_page);
#endif /* _LINUX_TIMENS_H */