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XArray: Unify xa_store and __xa_store 

Saves around 115 bytes on a tinyconfig build and reduces the amount
of code duplication in the XArray implementation.

Signed-off-by: Matthew Wilcox <willy@infradead.org>
This commit is contained in:
Matthew Wilcox 2018-11-05 15:56:17 -05:00
parent 84e5acb76d
commit 611f318637
1 changed files with 29 additions and 37 deletions
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66
lib/xarray.c
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@ -1360,43 +1360,6 @@ void *xa_erase(struct xarray *xa, unsigned long index)
}
EXPORT_SYMBOL(xa_erase);
/**
* xa_store() - Store this entry in the XArray.
* @xa: XArray.
* @index: Index into array.
* @entry: New entry.
* @gfp: Memory allocation flags.
*
* After this function returns, loads from this index will return @entry.
* Storing into an existing multislot entry updates the entry of every index.
* The marks associated with @index are unaffected unless @entry is %NULL.
*
* Context: Process context. Takes and releases the xa_lock. May sleep
* if the @gfp flags permit.
* Return: The old entry at this index on success, xa_err(-EINVAL) if @entry
* cannot be stored in an XArray, or xa_err(-ENOMEM) if memory allocation
* failed.
*/
void *xa_store(struct xarray *xa, unsigned long index, void *entry, gfp_t gfp)
{
XA_STATE(xas, xa, index);
void *curr;
if (WARN_ON_ONCE(xa_is_internal(entry)))
return XA_ERROR(-EINVAL);
do {
xas_lock(&xas);
curr = xas_store(&xas, entry);
if (xa_track_free(xa) && entry)
xas_clear_mark(&xas, XA_FREE_MARK);
xas_unlock(&xas);
} while (xas_nomem(&xas, gfp));
return xas_result(&xas, curr);
}
EXPORT_SYMBOL(xa_store);
/**
* __xa_store() - Store this entry in the XArray.
* @xa: XArray.
@ -1430,6 +1393,35 @@ void *__xa_store(struct xarray *xa, unsigned long index, void *entry, gfp_t gfp)
}
EXPORT_SYMBOL(__xa_store);
/**
* xa_store() - Store this entry in the XArray.
* @xa: XArray.
* @index: Index into array.
* @entry: New entry.
* @gfp: Memory allocation flags.
*
* After this function returns, loads from this index will return @entry.
* Storing into an existing multislot entry updates the entry of every index.
* The marks associated with @index are unaffected unless @entry is %NULL.
*
* Context: Any context. Takes and releases the xa_lock.
* May sleep if the @gfp flags permit.
* Return: The old entry at this index on success, xa_err(-EINVAL) if @entry
* cannot be stored in an XArray, or xa_err(-ENOMEM) if memory allocation
* failed.
*/
void *xa_store(struct xarray *xa, unsigned long index, void *entry, gfp_t gfp)
{
void *curr;
xa_lock(xa);
curr = __xa_store(xa, index, entry, gfp);
xa_unlock(xa);
return curr;
}
EXPORT_SYMBOL(xa_store);
/**
* __xa_cmpxchg() - Store this entry in the XArray.
* @xa: XArray.