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Commit 9c16bb88 authored by Matthew Wilcox's avatar Matthew Wilcox
Browse files

XArray: Turn xa_erase into an exported function 



Make xa_erase() take the spinlock and then call __xa_erase(), but make
it out of line since it's such a common function.

Signed-off-by: default avatarMatthew Wilcox <willy@infradead.org>
parent c5beb07e

include/linux/xarray.h

+1 −17
Original line number Diff line number Diff line
@@ -289,6 +289,7 @@ struct xarray { 
void xa_init_flags(struct xarray *, gfp_t flags);

void *xa_load(struct xarray *, unsigned long index);

void *xa_store(struct xarray *, unsigned long index, void *entry, gfp_t);

void *xa_erase(struct xarray *, unsigned long index);

void *xa_store_range(struct xarray *, unsigned long first, unsigned long last,

			void *entry, gfp_t);

bool xa_get_mark(struct xarray *, unsigned long index, xa_mark_t);
@@ -340,23 +341,6 @@ static inline bool xa_marked(const struct xarray *xa, xa_mark_t mark) 
	return xa->xa_flags & XA_FLAGS_MARK(mark);

}



/**

 * xa_erase() - Erase this entry from the XArray.

 * @xa: XArray.

 * @index: Index of entry.

 *

 * This function is the equivalent of calling xa_store() with %NULL as

 * the third argument.  The XArray does not need to allocate memory, so

 * the user does not need to provide GFP flags.

 *

 * Context: Process context.  Takes and releases the xa_lock.

 * Return: The entry which used to be at this index.

 */

static inline void *xa_erase(struct xarray *xa, unsigned long index)

{

	return xa_store(xa, index, NULL, 0);

}



/**

 * xa_for_each() - Iterate over a portion of an XArray.

 * @xa: XArray.

lib/xarray.c

+24 −0
Original line number Diff line number Diff line
@@ -1336,6 +1336,30 @@ void *__xa_erase(struct xarray *xa, unsigned long index) 
}

EXPORT_SYMBOL(__xa_erase);



/**

 * xa_erase() - Erase this entry from the XArray.

 * @xa: XArray.

 * @index: Index of entry.

 *

 * This function is the equivalent of calling xa_store() with %NULL as

 * the third argument.  The XArray does not need to allocate memory, so

 * the user does not need to provide GFP flags.

 *

 * Context: Any context.  Takes and releases the xa_lock.

 * Return: The entry which used to be at this index.

 */

void *xa_erase(struct xarray *xa, unsigned long index)

{

	void *entry;



	xa_lock(xa);

	entry = __xa_erase(xa, index);

	xa_unlock(xa);



	return entry;

}

EXPORT_SYMBOL(xa_erase);



/**

 * xa_store() - Store this entry in the XArray.

 * @xa: XArray.