• Vitaly Kuznetsov's avatar
    xen: Move xen_setup_callback_vector() definition to include/xen/hvm.h · 998c2034
    Vitaly Kuznetsov authored
    Kbuild test robot reports the following problem on ARM:
    
      for 'xen_setup_callback_vector' [-Wmissing-prototypes]
    1664 | void xen_setup_callback_vector(void) {}
    |      ^~~~~~~~~~~~~~~~~~~~~~~~~
    
    The problem is that xen_setup_callback_vector is a x86 only thing, its
    definition is present in arch/x86/xen/xen-ops.h but not on ARM. In
    events_base.c there is a stub for !CONFIG_XEN_PVHVM but it is not declared
    as 'static'.
    
    On x86 the situation is hardly better: drivers/xen/events/events_base.c
    doesn't include 'xen-ops.h' from arch/x86/xen/, it includes its namesake
    from include/xen/ which also results in a 'no previous prototype' warning.
    
    Currently, xen_setup_callback_vector() has two call sites: one in
    drivers/xen/events_base.c and another in arch/x86/xen/suspend_hvm.c. The
    former is placed under #ifdef CONFIG_X86 and the later is only compiled
    in when CONFIG_XEN_PVHVM.
    
    Resolve the issue by moving xen_setup_callback_vector() declaration to
    arch neutral 'include/xen/hvm.h' as the implementation lives in arch
    neutral drivers/xen/events/events_base.c.
    Reported-by: default avatarkbuild test robot <lkp@intel.com>
    Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
    Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    Reviewed-by: default avatarJuergen Gross <jgross@suse.com>
    Link: https://lkml.kernel.org/r/20200520161600.361895-1-vkuznets@redhat.com
    
    
    998c2034
suspend_hvm.c 386 Bytes