From: Arnd Bergmann <arnd@arndb.de>
Date: Wed, 27 Oct 2010 19:39:58 +0000 (+0200)
Subject: locks: turn lock_flocks into a spinlock
X-Git-Tag: v2.6.37-rc1~90^2
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=72f98e72551fa;p=~emulex%2Finfiniband.git

locks: turn lock_flocks into a spinlock

Nothing depends on lock_flocks using the BKL
any more, so we can do the switch over to
a private spinlock.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---

diff --git a/fs/Kconfig b/fs/Kconfig
index 65781de44fc..3d185308ec8 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -50,7 +50,6 @@ endif # BLOCK
 config FILE_LOCKING
 	bool "Enable POSIX file locking API" if EMBEDDED
 	default y
-	select BKL # while lockd still uses it.
 	help
 	  This option enables standard file locking support, required
           for filesystems like NFS and for the flock() system
diff --git a/fs/locks.c b/fs/locks.c
index 85fd9ce1aba..74c3df99c0e 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -142,6 +142,7 @@ int lease_break_time = 45;
 
 static LIST_HEAD(file_lock_list);
 static LIST_HEAD(blocked_list);
+static DEFINE_SPINLOCK(file_lock_lock);
 
 /*
  * Protects the two list heads above, plus the inode->i_flock list
@@ -149,13 +150,13 @@ static LIST_HEAD(blocked_list);
  */
 void lock_flocks(void)
 {
-	lock_kernel();
+	spin_lock(&file_lock_lock);
 }
 EXPORT_SYMBOL_GPL(lock_flocks);
 
 void unlock_flocks(void)
 {
-	unlock_kernel();
+	spin_unlock(&file_lock_lock);
 }
 EXPORT_SYMBOL_GPL(unlock_flocks);