M115 needs ifuncs for this
--
--- a/base/allocator/partition_allocator/partition_alloc_config.h
+++ b/base/allocator/partition_allocator/partition_alloc_config.h
@@ -151,7 +151,7 @@
    defined(ARCH_CPU_LITTLE_ENDIAN))
 
 #define PA_CONFIG_HAS_MEMORY_TAGGING()              \
-  (defined(ARCH_CPU_ARM64) && defined(__clang__) && \
+  (0 && defined(ARCH_CPU_ARM64) && defined(__clang__) && \
    (BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_ANDROID)))
 
 #if PA_CONFIG(HAS_MEMORY_TAGGING)