1 files changed, 5 insertions, 0 deletions

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 254dd2b81632..add9c7117751 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -174,6 +174,11 @@ extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c);
 extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
 extern void init_amd_cacheinfo(struct cpuinfo_x86 *c);
 #ifdef CONFIG_SYSFS
+/* Note: commit 04a1541828ea223169eb44a336bfad8ec0dfb46a hid num_cache_leaves,
+ * but LITMUS^RT currently still depends on it.
+ * FIXME: port LITMUS^RT's affinity-aware scheduling to use proper interfaces.
+ */
+extern unsigned short num_cache_leaves;
 extern int get_shared_cpu_map(cpumask_var_t mask,
                                unsigned int cpu, int index);
 #endif