dm,dax: Add dax zero_page_range operation

This patch adds support for dax zero_page_range operation to dm targets.

Vivek Goyal committed 6 years ago

Commit cdf6cdc1 parent 79fa9745 files · +91 −0Browse files

Showing the changes to include/linux (1 of 5 files). Show all

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@@ -141,6 +141,8 @@ typedef long (dm_dax_direct_access_fn) (struct dm_target ti, pgoff_t pgoff, · 140 unmodified lines
141	141	long nr_pages, void *kaddr, pfn_t pfn);
142	142	typedef size_t (dm_dax_copy_iter_fn)(struct dm_target ti, pgoff_t pgoff,
143	143	void addr, size_t bytes, struct iov_iter i);
	144	+typedef int (dm_dax_zero_page_range_fn)(struct dm_target ti, pgoff_t pgoff,
	145	+ size_t nr_pages);
144	146	#define PAGE_SECTORS (PAGE_SIZE / 512)
145	147
146	148	void dm_error(const char *message);
@@ -195,6 +197,7 @@ struct target_type { · 48 unmodified lines
195	197	dm_dax_direct_access_fn direct_access;
196	198	dm_dax_copy_iter_fn dax_copy_from_iter;
197	199	dm_dax_copy_iter_fn dax_copy_to_iter;
	200	+ dm_dax_zero_page_range_fn dax_zero_page_range;
198	201
199	202	/* For internal device-mapper use. */
200	203	struct list_head list;