diff options
Diffstat (limited to 'drivers/ntb/ntb_transport.c')
| -rw-r--r-- | drivers/ntb/ntb_transport.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c index 71d4bb25f7fd..21e1d238bc31 100644 --- a/drivers/ntb/ntb_transport.c +++ b/drivers/ntb/ntb_transport.c @@ -1810,12 +1810,13 @@ static void ntb_tx_copy_callback(void *data, static void ntb_memcpy_tx(struct ntb_queue_entry *entry, void __iomem *offset) { -#ifdef ARCH_HAS_NOCACHE_UACCESS +#ifdef copy_to_nontemporal /* * Using non-temporal mov to improve performance on non-cached - * writes, even though we aren't actually copying from user space. + * writes. This only works if __iomem is strictly memory-like, + * but that is the case on x86-64 */ - __copy_from_user_inatomic_nocache(offset, entry->buf, entry->len); + copy_to_nontemporal(offset, entry->buf, entry->len); #else memcpy_toio(offset, entry->buf, entry->len); #endif |