[PATCH v16 6/9] arm64: mte: Conditionally compile mte_enable_kernel_*()

[Vincenzo Frascino]

mte_enable_kernel_*() are not needed if KASAN_HW is disabled.

Add ash defines around the functions to conditionally compile the
functions.

Signed-off-by: Vincenzo Frascino <vincenzo.frascino at arm.com>
---
 arch/arm64/kernel/mte.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c
index 9362928ba0d5..50f0724c8d8f 100644
--- a/arch/arm64/kernel/mte.c
+++ b/arch/arm64/kernel/mte.c
@@ -26,9 +26,11 @@ u64 gcr_kernel_excl __ro_after_init;
 
 static bool report_fault_once = true;
 
+#ifdef CONFIG_KASAN_HW_TAGS
 /* Whether the MTE asynchronous mode is enabled. */
 DEFINE_STATIC_KEY_FALSE(mte_async_mode);
 EXPORT_SYMBOL_GPL(mte_async_mode);
+#endif
 
 static void mte_sync_page_tags(struct page *page, pte_t *ptep, bool check_swap)
 {
@@ -120,6 +122,7 @@ static inline void __mte_enable_kernel(const char *mode, unsigned long tcf)
 	pr_info_once("MTE: enabled in %s mode at EL1\n", mode);
 }
 
+#ifdef CONFIG_KASAN_HW_TAGS
 void mte_enable_kernel_sync(void)
 {
 	/*
@@ -147,6 +150,7 @@ void mte_enable_kernel_async(void)
 	if (!system_uses_mte_async_mode())
 		static_branch_enable(&mte_async_mode);
 }
+#endif
 
 void mte_set_report_once(bool state)
 {
-- 
2.30.2