perf/x86/ibs: Fix undefined reference to `get_ibs_caps'

Fixing i386 allnoconfig built errors:

 arch/x86/built-in.o: In function `amd_pmu_hw_config':
 perf_event_amd.c:(.text+0xc3e1): undefined reference to `get_ibs_caps'

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 4e40a64315c9..588f52ea810e 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -188,7 +188,11 @@ struct x86_pmu_capability {
 #define IBS_OP_MAX_CNT_EXT      0x007FFFFFULL   /* not a register bit mask */
 #define IBS_RIP_INVALID         (1ULL<<38)
 
+#ifdef CONFIG_X86_LOCAL_APIC
 extern u32 get_ibs_caps(void);
+#else
+static inline u32 get_ibs_caps(void) { return 0; }
+#endif
 
 #ifdef CONFIG_PERF_EVENTS
 extern void perf_events_lapic_init(void);