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Commit 3c60e868 authored by willy@infradead.org's avatar willy@infradead.org Committed by Jason Gunthorpe
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IDR: Expose the XArray lock 



Allow users of the IDR to use the XArray lock for their own
synchronisation purposes.  The IDR continues to rely on the caller to
handle locking, but this lets the caller use the lock embedded in the
IDR data structure instead of allocating their own lock.

Signed-off-by: default avatarMatthew Wilcox <willy@infradead.org>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent 89af969a

include/linux/idr.h

+11 −0
Original line number Diff line number Diff line
@@ -98,6 +98,17 @@ static inline void idr_set_cursor(struct idr *idr, unsigned int val) 
 * period).

 */



#define idr_lock(idr)		xa_lock(&(idr)->idr_rt)

#define idr_unlock(idr)		xa_unlock(&(idr)->idr_rt)

#define idr_lock_bh(idr)	xa_lock_bh(&(idr)->idr_rt)

#define idr_unlock_bh(idr)	xa_unlock_bh(&(idr)->idr_rt)

#define idr_lock_irq(idr)	xa_lock_irq(&(idr)->idr_rt)

#define idr_unlock_irq(idr)	xa_unlock_irq(&(idr)->idr_rt)

#define idr_lock_irqsave(idr, flags) \

				xa_lock_irqsave(&(idr)->idr_rt, flags)

#define idr_unlock_irqrestore(idr, flags) \

				xa_unlock_irqrestore(&(idr)->idr_rt, flags)



void idr_preload(gfp_t gfp_mask);



int idr_alloc(struct idr *, void *ptr, int start, int end, gfp_t);