diff --git a/arch/arm64/include/asm/fpsimd.h b/arch/arm64/include/asm/fpsimd.h
index e0e30567b80f..917ecc301d1d 100644
--- a/arch/arm64/include/asm/fpsimd.h
+++ b/arch/arm64/include/asm/fpsimd.h
@@ -104,8 +104,6 @@ static inline bool sve_vq_available(unsigned int vq)
 
 #ifdef CONFIG_ARM64_SVE
 
-extern size_t sve_state_size(struct task_struct const *task);
-
 extern void sve_alloc(struct task_struct *task);
 extern void fpsimd_release_task(struct task_struct *task);
 extern void fpsimd_sync_to_sve(struct task_struct *task);
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index 995f8801602b..0f6df1ece618 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -497,7 +497,7 @@ static void sve_to_fpsimd(struct task_struct *task)
  * Return how many bytes of memory are required to store the full SVE
  * state for task, given task's currently configured vector length.
  */
-size_t sve_state_size(struct task_struct const *task)
+static size_t sve_state_size(struct task_struct const *task)
 {
 	return SVE_SIG_REGS_SIZE(sve_vq_from_vl(task->thread.sve_vl));
 }