X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=drivers%2Finfiniband%2Fcore%2Fucm.c;h=e603736682bfc6e52fbc6f4802375bd329aa7850;hb=855caa37b9b61c1ccfeb91a2bc04d90bfc5e4525;hp=9494005d1c9a62fe1463c94320af061f6ee1e40e;hpb=5b664cb235e97afbf34db9c4d77f08ebd725335e;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c
index 9494005d1c9..e603736682b 100644
--- a/drivers/infiniband/core/ucm.c
+++ b/drivers/infiniband/core/ucm.c
@@ -43,7 +43,6 @@
 #include <linux/cdev.h>
 #include <linux/idr.h>
 #include <linux/mutex.h>
-#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 
@@ -1154,11 +1153,18 @@ static unsigned int ib_ucm_poll(struct file *filp,
 	return mask;
 }
 
+/*
+ * ib_ucm_open() does not need the BKL:
+ *
+ *  - no global state is referred to;
+ *  - there is no ioctl method to race against;
+ *  - no further module initialization is required for open to work
+ *    after the device is registered.
+ */
 static int ib_ucm_open(struct inode *inode, struct file *filp)
 {
 	struct ib_ucm_file *file;
 
-	cycle_kernel_lock();
 	file = kmalloc(sizeof(*file), GFP_KERNEL);
 	if (!file)
 		return -ENOMEM;