[XFS] growlock should be a mutex

m_growlock only needs plain binary mutex semantics, so use a struct mutex
instead of a semaphore for it.

SGI-PV: 968563
SGI-Modid: xfs-linux-melb:xfs-kern:29512a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

3 files changed, 7 insertions, 7 deletions

diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 94bd9f2d9d77..c92d5b821029 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -433,10 +433,10 @@ xfs_growfs_data(
         xfs_growfs_data_t       *in)
 {
         int error;
-        if (!cpsema(&mp->m_growlock))
+        if (!mutex_trylock(&mp->m_growlock))
                 return XFS_ERROR(EWOULDBLOCK);
         error = xfs_growfs_data_private(mp, in);
-        vsema(&mp->m_growlock);
+        mutex_unlock(&mp->m_growlock);
         return error;
 }
 
@@ -446,10 +446,10 @@ xfs_growfs_log(
         xfs_growfs_log_t        *in)
 {
         int error;
-        if (!cpsema(&mp->m_growlock))
+        if (!mutex_trylock(&mp->m_growlock))
                 return XFS_ERROR(EWOULDBLOCK);
         error = xfs_growfs_log_private(mp, in);
-        vsema(&mp->m_growlock);
+        mutex_unlock(&mp->m_growlock);
         return error;
 }
 
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index ba8df2f0dd4f..ebdb76da527c 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -139,7 +139,7 @@ xfs_mount_init(void)
         AIL_LOCKINIT(&mp->m_ail_lock, "xfs_ail");
         spinlock_init(&mp->m_sb_lock, "xfs_sb");
         mutex_init(&mp->m_ilock);
-        initnsema(&mp->m_growlock, 1, "xfs_grow");
+        mutex_init(&mp->m_growlock);
         /*
          * Initialize the AIL.
          */
@@ -174,7 +174,7 @@ xfs_mount_free(
         AIL_LOCK_DESTROY(&mp->m_ail_lock);
         spinlock_destroy(&mp->m_sb_lock);
         mutex_destroy(&mp->m_ilock);
-        freesema(&mp->m_growlock);
+        mutex_destroy(&mp->m_growlock);
         if (mp->m_quotainfo)
                 XFS_QM_DONE(mp);
 
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 7f671f8269b4..c618f7cb5f0e 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -384,7 +384,7 @@ typedef struct xfs_mount {
         uint                    m_in_maxlevels; /* XFS_IN_MAXLEVELS */
         struct xfs_perag        *m_perag;       /* per-ag accounting info */
         struct rw_semaphore     m_peraglock;    /* lock for m_perag (pointer) */
-        sema_t                  m_growlock;     /* growfs mutex */
+        struct mutex            m_growlock;     /* growfs mutex */
         int                     m_fixedfsid[2]; /* unchanged for life of FS */
         uint                    m_dmevmask;     /* DMI events for this FS */
         __uint64_t              m_flags;        /* global mount flags */