[PATCH] SELinux: convert sbsec semaphore to a mutex

This patch converts the semaphore in the superblock security struct to a
mutex.  No locking changes or other code changes are done.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 4 insertions, 5 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 63ad57ab44fc..55cec4d6f117 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -51,7 +51,6 @@
 #include <net/ip.h>             /* for sysctl_local_port_range[] */
 #include <net/tcp.h>            /* struct or_callable used in sock_rcv_skb */
 #include <asm/uaccess.h>
-#include <asm/semaphore.h>
 #include <asm/ioctls.h>
 #include <linux/bitops.h>
 #include <linux/interrupt.h>
@@ -243,7 +242,7 @@ static int superblock_alloc_security(struct super_block *sb)
         if (!sbsec)
                 return -ENOMEM;
 
-        init_MUTEX(&sbsec->sem);
+        mutex_init(&sbsec->lock);
         INIT_LIST_HEAD(&sbsec->list);
         INIT_LIST_HEAD(&sbsec->isec_head);
         spin_lock_init(&sbsec->isec_lock);
@@ -595,7 +594,7 @@ static int superblock_doinit(struct super_block *sb, void *data)
         struct inode *inode = root->d_inode;
         int rc = 0;
 
-        down(&sbsec->sem);
+        mutex_lock(&sbsec->lock);
         if (sbsec->initialized)
                 goto out;
 
@@ -690,7 +689,7 @@ next_inode:
         }
         spin_unlock(&sbsec->isec_lock);
 out:
-        up(&sbsec->sem);
+        mutex_unlock(&sbsec->lock);
         return rc;
 }
 
diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h
index 7d5a0289878b..ef2267fea8bd 100644
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
@@ -63,7 +63,7 @@ struct superblock_security_struct {
         unsigned int behavior;          /* labeling behavior */
         unsigned char initialized;      /* initialization flag */
         unsigned char proc;             /* proc fs */
-        struct semaphore sem;
+        struct mutex lock;
         struct list_head isec_head;
         spinlock_t isec_lock;
 };