The Hyper-V APIC code is built when CONFIG_HYPERV is enabled but the actual
code in that file is guarded with CONFIG_X86_64. There is no point in doing
this. Neither is there a point in having the CONFIG_HYPERV guard in there
because the containing directory is not built when CONFIG_HYPERV=n.
Further for the hv_init_apic() function a stub is provided only for
CONFIG_HYPERV=n, which is pointless as the callsite is not compiled at
all. But for X86_32 the stub is missing and the build fails.
Clean that up:
- Compile hv_apic.c only when CONFIG_X86_64=y
- Make the stub for hv_init_apic() available when CONFG_X86_64=n
Fixes:
6b48cb5f8347 ("X86/Hyper-V: Enlighten APIC access")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Michael Kelley <mikelley@microsoft.com>
-obj-y := hv_init.o mmu.o hv_apic.o
+obj-y := hv_init.o mmu.o
+obj-$(CONFIG_X86_64) += hv_apic.o
#include <asm/mshyperv.h>
#include <asm/apic.h>
-#ifdef CONFIG_X86_64
-#if IS_ENABLED(CONFIG_HYPERV)
-
static struct apic orig_apic;
static u64 hv_apic_icr_read(void)
apic->icr_read = hv_apic_icr_read;
}
}
-
-#endif /* CONFIG_HYPERV */
-#endif /* CONFIG_X86_64 */
void set_hv_tscchange_cb(void (*cb)(void));
void clear_hv_tscchange_cb(void);
void hyperv_stop_tsc_emulation(void);
+
+#ifdef CONFIG_X86_64
void hv_apic_init(void);
+#else
+static inline void hv_apic_init(void) {}
+#endif
+
#else /* CONFIG_HYPERV */
static inline void hyperv_init(void) {}
static inline bool hv_is_hyperv_initialized(void) { return false; }
static inline void set_hv_tscchange_cb(void (*cb)(void)) {}
static inline void clear_hv_tscchange_cb(void) {}
static inline void hyperv_stop_tsc_emulation(void) {};
-static inline void hv_apic_init(void) {}
static inline struct hv_vp_assist_page *hv_get_vp_assist_page(unsigned int cpu)
{
return NULL;