lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Wed, 13 Jun 2018 11:45:55 -0700
From:   Matthew Wilcox <>
To:, Doug Ledford <>,
        Jason Gunthorpe <>
Cc:     Matthew Wilcox <>,,
        HÃ¥kon Bugge <>,
        Parav Pandit <>,
        Jack Morgenstein <>,
        Pravin Shedge <>,
Subject: [PATCH 1/2] 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: Matthew Wilcox <>
 include/linux/idr.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/linux/idr.h b/include/linux/idr.h
index e856f4e0ab35..3e8215b2c371 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -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);

Powered by blists - more mailing lists