Commit 82a95849 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

XArray: Add wrappers for nested spinlocks 



Some users need to take an xarray lock while holding another xarray lock.

Reported-by: default avatarDoug Gilbert <dgilbert@interlog.com>
Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
parent 6b81141d

include/linux/xarray.h

+8 −0
Original line number Diff line number Diff line
@@ -508,6 +508,14 @@ static inline bool xa_marked(const struct xarray *xa, xa_mark_t mark) 
				spin_lock_irqsave(&(xa)->xa_lock, flags)

#define xa_unlock_irqrestore(xa, flags) \

				spin_unlock_irqrestore(&(xa)->xa_lock, flags)

#define xa_lock_nested(xa, subclass) \

				spin_lock_nested(&(xa)->xa_lock, subclass)

#define xa_lock_bh_nested(xa, subclass) \

				spin_lock_bh_nested(&(xa)->xa_lock, subclass)

#define xa_lock_irq_nested(xa, subclass) \

				spin_lock_irq_nested(&(xa)->xa_lock, subclass)

#define xa_lock_irqsave_nested(xa, flags, subclass) \

		spin_lock_irqsave_nested(&(xa)->xa_lock, flags, subclass)



/*

 * Versions of the normal API which require the caller to hold the