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-rw-r--r--drivers/dax/super.c21
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 938eb4868f7f..8b458f1b30c7 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -189,8 +189,10 @@ static umode_t dax_visible(struct kobject *kobj, struct attribute *a, int n)
if (!dax_dev)
return 0;
- if (a == &dev_attr_write_cache.attr && !dax_dev->ops->flush)
+#ifndef CONFIG_ARCH_HAS_PMEM_API
+ if (a == &dev_attr_write_cache.attr)
return 0;
+#endif
return a->mode;
}
@@ -255,18 +257,23 @@ size_t dax_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff, void *addr,
}
EXPORT_SYMBOL_GPL(dax_copy_from_iter);
-void dax_flush(struct dax_device *dax_dev, pgoff_t pgoff, void *addr,
- size_t size)
+#ifdef CONFIG_ARCH_HAS_PMEM_API
+void arch_wb_cache_pmem(void *addr, size_t size);
+void dax_flush(struct dax_device *dax_dev, void *addr, size_t size)
{
- if (!dax_alive(dax_dev))
+ if (unlikely(!dax_alive(dax_dev)))
return;
- if (!test_bit(DAXDEV_WRITE_CACHE, &dax_dev->flags))
+ if (unlikely(!test_bit(DAXDEV_WRITE_CACHE, &dax_dev->flags)))
return;
- if (dax_dev->ops->flush)
- dax_dev->ops->flush(dax_dev, pgoff, addr, size);
+ arch_wb_cache_pmem(addr, size);
}
+#else
+void dax_flush(struct dax_device *dax_dev, void *addr, size_t size)
+{
+}
+#endif
EXPORT_SYMBOL_GPL(dax_flush);
void dax_write_cache(struct dax_device *dax_dev, bool wc)