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xarray: Extract entries from an XArray

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The xa_extract function combines the functionality of
radix_tree_gang_lookup() and radix_tree_gang_lookup_tagged().
It extracts entries matching the specified filter into a normal array.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Matthew Wilcox
2017-11-14 16:42:22 -05:00
parent b803b42823
commit 80a0a1a9a3
2 changed files with 82 additions and 0 deletions
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2
include/linux/xarray.h
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@@ -284,6 +284,8 @@ void *xa_find(struct xarray *xa, unsigned long *index,
unsigned long max, xa_mark_t) __attribute__((nonnull(2)));
void *xa_find_after(struct xarray *xa, unsigned long *index,
unsigned long max, xa_mark_t) __attribute__((nonnull(2)));
unsigned int xa_extract(struct xarray *, void **dst, unsigned long start,
unsigned long max, unsigned int n, xa_mark_t);
/**
* xa_init() - Initialise an empty XArray.