__HAVE_ARCH_MEMCPY_MCSAFE 50 drivers/md/dm-writecache.c #if defined(__HAVE_ARCH_MEMCPY_MCSAFE) && defined(DM_WRITECACHE_HAS_PMEM) __HAVE_ARCH_MEMCPY_MCSAFE 163 include/linux/string.h #ifndef __HAVE_ARCH_MEMCPY_MCSAFE