NTFS: Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
index 9fb08ef..35cc4b1 100644 (file)
--- a/fs/ntfs/ChangeLog
+++ b/fs/ntfs/ChangeLog
@@ -43,6 +43,7 @@ ToDo/Notes:
          fs/ntfs/inode.c::ntfs_write_inode().
        - Handle the recently introduced -ENAMETOOLONG return value from
          fs/ntfs/unistr.c::ntfs_nlstoucs() in fs/ntfs/namei.c::ntfs_lookup().
+       - Semaphore to mutex conversion.  (Ingo Molnar)
 
 2.1.26 - Minor bug fixes and updates.
 

diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c
index 1cf105b..580412d 100644 (file)
--- a/fs/ntfs/aops.c
+++ b/fs/ntfs/aops.c
@@ -1278,18 +1278,18 @@ unm_done:
                
                tni = locked_nis[nr_locked_nis];
                /* Get the base inode. */
-               down(&tni->extent_lock);
+               mutex_lock(&tni->extent_lock);
                if (tni->nr_extents >= 0)
                        base_tni = tni;
                else {
                        base_tni = tni->ext.base_ntfs_ino;
                        BUG_ON(!base_tni);
                }
-               up(&tni->extent_lock);
+               mutex_unlock(&tni->extent_lock);
                ntfs_debug("Unlocking %s inode 0x%lx.",
                                tni == base_tni ? "base" : "extent",
                                tni->mft_no);
-               up(&tni->mrec_lock);
+               mutex_unlock(&tni->mrec_lock);
                atomic_dec(&tni->count);
                iput(VFS_I(base_tni));
        }

diff --git a/fs/ntfs/compress.c b/fs/ntfs/compress.c
index 25d2410..68a607f 100644 (file)
--- a/fs/ntfs/compress.c
+++ b/fs/ntfs/compress.c
@@ -67,7 +67,7 @@ static DEFINE_SPINLOCK(ntfs_cb_lock);
 /**
  * allocate_compression_buffers - allocate the decompression buffers
  *
- * Caller has to hold the ntfs_lock semaphore.
+ * Caller has to hold the ntfs_lock mutex.
  *
  * Return 0 on success or -ENOMEM if the allocations failed.
  */
@@ -84,7 +84,7 @@ int allocate_compression_buffers(void)
 /**
  * free_compression_buffers - free the decompression buffers
  *
- * Caller has to hold the ntfs_lock semaphore.
+ * Caller has to hold the ntfs_lock mutex.
  */
 void free_compression_buffers(void)
 {

diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index 73791b2..4c86b7e 100644 (file)
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -388,7 +388,7 @@ void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni)
        atomic_set(&ni->count, 1);
        ni->vol = NTFS_SB(sb);
        ntfs_init_runlist(&ni->runlist);
-       init_MUTEX(&ni->mrec_lock);
+       mutex_init(&ni->mrec_lock);
        ni->page = NULL;
        ni->page_ofs = 0;
        ni->attr_list_size = 0;
@@ -400,7 +400,7 @@ void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni)
        ni->itype.index.collation_rule = 0;
        ni->itype.index.block_size_bits = 0;
        ni->itype.index.vcn_size_bits = 0;
-       init_MUTEX(&ni->extent_lock);
+       mutex_init(&ni->extent_lock);
        ni->nr_extents = 0;
        ni->ext.base_ntfs_ino = NULL;
 }
@@ -3066,7 +3066,7 @@ int ntfs_write_inode(struct inode *vi, int sync)
         */
        if (modified) {
                flush_dcache_mft_record_page(ctx->ntfs_ino);
-               if (!NInoTestSetDirty(ctx->ntfs_ino)) {
+               if (!NInoTestSetDirty(ctx->ntfs_ino))
                        mark_ntfs_record_dirty(ctx->ntfs_ino->page,
                                        ctx->ntfs_ino->page_ofs);
        }
@@ -3075,7 +3075,7 @@ int ntfs_write_inode(struct inode *vi, int sync)
        if (NInoDirty(ni))
                err = write_mft_record(ni, m, sync);
        /* Write all attached extent mft records. */
-       down(&ni->extent_lock);
+       mutex_lock(&ni->extent_lock);
        if (ni->nr_extents > 0) {
                ntfs_inode **extent_nis = ni->ext.extent_ntfs_inos;
                int i;
@@ -3102,7 +3102,7 @@ int ntfs_write_inode(struct inode *vi, int sync)
                        }
                }
        }
-       up(&ni->extent_lock);
+       mutex_unlock(&ni->extent_lock);
        unmap_mft_record(ni);
        if (unlikely(err))
                goto err_out;

diff --git a/fs/ntfs/inode.h b/fs/ntfs/inode.h
index 3de5c02..f088291 100644 (file)
--- a/fs/ntfs/inode.h
+++ b/fs/ntfs/inode.h
@@ -24,12 +24,13 @@
 #ifndef _LINUX_NTFS_INODE_H
 #define _LINUX_NTFS_INODE_H
 
-#include <linux/mm.h>
+#include <asm/atomic.h>
+
 #include <linux/fs.h>
-#include <linux/seq_file.h>
 #include <linux/list.h>
-#include <asm/atomic.h>
-#include <asm/semaphore.h>
+#include <linux/mm.h>
+#include <linux/mutex.h>
+#include <linux/seq_file.h>
 
 #include "layout.h"
 #include "volume.h"
@@ -81,7 +82,7 @@ struct _ntfs_inode {
         * The following fields are only valid for real inodes and extent
         * inodes.
         */
-       struct semaphore mrec_lock; /* Lock for serializing access to the
+       struct mutex mrec_lock; /* Lock for serializing access to the
                                   mft record belonging to this inode. */
        struct page *page;      /* The page containing the mft record of the
                                   inode. This should only be touched by the
@@ -119,7 +120,7 @@ struct _ntfs_inode {
                        u8 block_clusters;      /* Number of clusters per cb. */
                } compressed;
        } itype;
-       struct semaphore extent_lock;   /* Lock for accessing/modifying the
+       struct mutex extent_lock;       /* Lock for accessing/modifying the
                                           below . */
        s32 nr_extents; /* For a base mft record, the number of attached extent
                           inodes (0 if none), for extent records and for fake

diff --git a/fs/ntfs/mft.c b/fs/ntfs/mft.c
index eb3eb14..4e72bc7 100644 (file)
--- a/fs/ntfs/mft.c
+++ b/fs/ntfs/mft.c
@@ -105,8 +105,8 @@ err_out:
  * map_mft_record - map, pin and lock an mft record
  * @ni:                ntfs inode whose MFT record to map
  *
- * First, take the mrec_lock semaphore. We might now be sleeping, while waiting
- * for the semaphore if it was already locked by someone else.
+ * First, take the mrec_lock mutex.  We might now be sleeping, while waiting
+ * for the mutex if it was already locked by someone else.
  *
  * The page of the record is mapped using map_mft_record_page() before being
  * returned to the caller.
@@ -136,9 +136,9 @@ err_out:
  * So that code will end up having to own the mrec_lock of all mft
  * records/inodes present in the page before I/O can proceed. In that case we
  * wouldn't need to bother with PG_locked and PG_uptodate as nobody will be
- * accessing anything without owning the mrec_lock semaphore. But we do need
- * to use them because of the read_cache_page() invocation and the code becomes
- * so much simpler this way that it is well worth it.
+ * accessing anything without owning the mrec_lock mutex.  But we do need to
+ * use them because of the read_cache_page() invocation and the code becomes so
+ * much simpler this way that it is well worth it.
  *
  * The mft record is now ours and we return a pointer to it. You need to check
  * the returned pointer with IS_ERR() and if that is true, PTR_ERR() will return
@@ -161,13 +161,13 @@ MFT_RECORD *map_mft_record(ntfs_inode *ni)
        atomic_inc(&ni->count);
 
        /* Serialize access to this mft record. */
-       down(&ni->mrec_lock);
+       mutex_lock(&ni->mrec_lock);
 
        m = map_mft_record_page(ni);
        if (likely(!IS_ERR(m)))
                return m;
 
-       up(&ni->mrec_lock);
+       mutex_unlock(&ni->mrec_lock);
        atomic_dec(&ni->count);
        ntfs_error(ni->vol->sb, "Failed with error code %lu.", -PTR_ERR(m));
        return m;
@@ -218,7 +218,7 @@ void unmap_mft_record(ntfs_inode *ni)
        ntfs_debug("Entering for mft_no 0x%lx.", ni->mft_no);
 
        unmap_mft_record_page(ni);
-       up(&ni->mrec_lock);
+       mutex_unlock(&ni->mrec_lock);
        atomic_dec(&ni->count);
        /*
         * If pure ntfs_inode, i.e. no vfs inode attached, we leave it to
@@ -262,7 +262,7 @@ MFT_RECORD *map_extent_mft_record(ntfs_inode *base_ni, MFT_REF mref,
         * in which case just return it. If not found, add it to the base
         * inode before returning it.
         */
-       down(&base_ni->extent_lock);
+       mutex_lock(&base_ni->extent_lock);
        if (base_ni->nr_extents > 0) {
                extent_nis = base_ni->ext.extent_ntfs_inos;
                for (i = 0; i < base_ni->nr_extents; i++) {
@@ -275,7 +275,7 @@ MFT_RECORD *map_extent_mft_record(ntfs_inode *base_ni, MFT_REF mref,
                }
        }
        if (likely(ni != NULL)) {
-               up(&base_ni->extent_lock);
+               mutex_unlock(&base_ni->extent_lock);
                atomic_dec(&base_ni->count);
                /* We found the record; just have to map and return it. */
                m = map_mft_record(ni);
@@ -302,7 +302,7 @@ map_err_out:
        /* Record wasn't there. Get a new ntfs inode and initialize it. */
        ni = ntfs_new_extent_inode(base_ni->vol->sb, mft_no);
        if (unlikely(!ni)) {
-               up(&base_ni->extent_lock);
+               mutex_unlock(&base_ni->extent_lock);
                atomic_dec(&base_ni->count);
                return ERR_PTR(-ENOMEM);
        }
@@ -313,7 +313,7 @@ map_err_out:
        /* Now map the record. */
        m = map_mft_record(ni);
        if (IS_ERR(m)) {
-               up(&base_ni->extent_lock);
+               mutex_unlock(&base_ni->extent_lock);
                atomic_dec(&base_ni->count);
                ntfs_clear_extent_inode(ni);
                goto map_err_out;
@@ -348,14 +348,14 @@ map_err_out:
                base_ni->ext.extent_ntfs_inos = tmp;
        }
        base_ni->ext.extent_ntfs_inos[base_ni->nr_extents++] = ni;
-       up(&base_ni->extent_lock);
+       mutex_unlock(&base_ni->extent_lock);
        atomic_dec(&base_ni->count);
        ntfs_debug("Done 2.");
        *ntfs_ino = ni;
        return m;
 unm_err_out:
        unmap_mft_record(ni);
-       up(&base_ni->extent_lock);
+       mutex_unlock(&base_ni->extent_lock);
        atomic_dec(&base_ni->count);
        /*
         * If the extent inode was not attached to the base inode we need to
@@ -400,12 +400,12 @@ void __mark_mft_record_dirty(ntfs_inode *ni)
        BUG_ON(NInoAttr(ni));
        mark_ntfs_record_dirty(ni->page, ni->page_ofs);
        /* Determine the base vfs inode and mark it dirty, too. */
-       down(&ni->extent_lock);
+       mutex_lock(&ni->extent_lock);
        if (likely(ni->nr_extents >= 0))
                base_ni = ni;
        else
                base_ni = ni->ext.base_ntfs_ino;
-       up(&ni->extent_lock);
+       mutex_unlock(&ni->extent_lock);
        __mark_inode_dirty(VFS_I(base_ni), I_DIRTY_SYNC | I_DIRTY_DATASYNC);
 }
 
@@ -981,7 +981,7 @@ BOOL ntfs_may_write_mft_record(ntfs_volume *vol, const unsigned long mft_no,
                }
                ntfs_debug("Inode 0x%lx is not dirty.", mft_no);
                /* The inode is not dirty, try to take the mft record lock. */
-               if (unlikely(down_trylock(&ni->mrec_lock))) {
+               if (unlikely(!mutex_trylock(&ni->mrec_lock))) {
                        ntfs_debug("Mft record 0x%lx is already locked, do "
                                        "not write it.", mft_no);
                        atomic_dec(&ni->count);
@@ -1041,13 +1041,13 @@ BOOL ntfs_may_write_mft_record(ntfs_volume *vol, const unsigned long mft_no,
         * corresponding to this extent mft record attached.
         */
        ni = NTFS_I(vi);
-       down(&ni->extent_lock);
+       mutex_lock(&ni->extent_lock);
        if (ni->nr_extents <= 0) {
                /*
                 * The base inode has no attached extent inodes, write this
                 * extent mft record.
                 */
-               up(&ni->extent_lock);
+               mutex_unlock(&ni->extent_lock);
                iput(vi);
                ntfs_debug("Base inode 0x%lx has no attached extent inodes, "
                                "write the extent record.", na.mft_no);
@@ -1070,7 +1070,7 @@ BOOL ntfs_may_write_mft_record(ntfs_volume *vol, const unsigned long mft_no,
         * extent mft record.
         */
        if (!eni) {
-               up(&ni->extent_lock);
+               mutex_unlock(&ni->extent_lock);
                iput(vi);
                ntfs_debug("Extent inode 0x%lx is not attached to its base "
                                "inode 0x%lx, write the extent record.",
@@ -1081,12 +1081,12 @@ BOOL ntfs_may_write_mft_record(ntfs_volume *vol, const unsigned long mft_no,
                        mft_no, na.mft_no);
        /* Take a reference to the extent ntfs inode. */
        atomic_inc(&eni->count);
-       up(&ni->extent_lock);
+       mutex_unlock(&ni->extent_lock);
        /*
         * Found the extent inode coresponding to this extent mft record.
         * Try to take the mft record lock.
         */
-       if (unlikely(down_trylock(&eni->mrec_lock))) {
+       if (unlikely(!mutex_trylock(&eni->mrec_lock))) {
                atomic_dec(&eni->count);
                iput(vi);
                ntfs_debug("Extent mft record 0x%lx is already locked, do "
@@ -2709,7 +2709,7 @@ mft_rec_already_initialized:
                 * have its page mapped and it is very easy to do.
                 */
                atomic_inc(&ni->count);
-               down(&ni->mrec_lock);
+               mutex_lock(&ni->mrec_lock);
                ni->page = page;
                ni->page_ofs = ofs;
                /*
@@ -2796,22 +2796,22 @@ int ntfs_extent_mft_record_free(ntfs_inode *ni, MFT_RECORD *m)
        BUG_ON(NInoAttr(ni));
        BUG_ON(ni->nr_extents != -1);
 
-       down(&ni->extent_lock);
+       mutex_lock(&ni->extent_lock);
        base_ni = ni->ext.base_ntfs_ino;
-       up(&ni->extent_lock);
+       mutex_unlock(&ni->extent_lock);
 
        BUG_ON(base_ni->nr_extents <= 0);
 
        ntfs_debug("Entering for extent inode 0x%lx, base inode 0x%lx.\n",
                        mft_no, base_ni->mft_no);
 
-       down(&base_ni->extent_lock);
+       mutex_lock(&base_ni->extent_lock);
 
        /* Make sure we are holding the only reference to the extent inode. */
        if (atomic_read(&ni->count) > 2) {
                ntfs_error(vol->sb, "Tried to free busy extent inode 0x%lx, "
                                "not freeing.", base_ni->mft_no);
-               up(&base_ni->extent_lock);
+               mutex_unlock(&base_ni->extent_lock);
                return -EBUSY;
        }
 
@@ -2829,7 +2829,7 @@ int ntfs_extent_mft_record_free(ntfs_inode *ni, MFT_RECORD *m)
                break;
        }
 
-       up(&base_ni->extent_lock);
+       mutex_unlock(&base_ni->extent_lock);
 
        if (unlikely(err)) {
                ntfs_error(vol->sb, "Extent inode 0x%lx is not attached to "
@@ -2888,7 +2888,7 @@ rollback_error:
        return 0;
 rollback:
        /* Rollback what we did... */
-       down(&base_ni->extent_lock);
+       mutex_lock(&base_ni->extent_lock);
        extent_nis = base_ni->ext.extent_ntfs_inos;
        if (!(base_ni->nr_extents & 3)) {
                int new_size = (base_ni->nr_extents + 4) * sizeof(ntfs_inode*);
@@ -2897,7 +2897,7 @@ rollback:
                if (unlikely(!extent_nis)) {
                        ntfs_error(vol->sb, "Failed to allocate internal "
                                        "buffer during rollback.%s", es);
-                       up(&base_ni->extent_lock);
+                       mutex_unlock(&base_ni->extent_lock);
                        NVolSetErrors(vol);
                        goto rollback_error;
                }
@@ -2912,7 +2912,7 @@ rollback:
        m->flags |= MFT_RECORD_IN_USE;
        m->sequence_number = old_seq_no;
        extent_nis[base_ni->nr_extents++] = ni;
-       up(&base_ni->extent_lock);
+       mutex_unlock(&base_ni->extent_lock);
        mark_mft_record_dirty(ni);
        return err;
 }

diff --git a/fs/ntfs/ntfs.h b/fs/ntfs/ntfs.h
index 653d2a5..0624c8e 100644 (file)
--- a/fs/ntfs/ntfs.h
+++ b/fs/ntfs/ntfs.h
@@ -91,7 +91,7 @@ extern void free_compression_buffers(void);
 
 /* From fs/ntfs/super.c */
 #define default_upcase_len 0x10000
-extern struct semaphore ntfs_lock;
+extern struct mutex ntfs_lock;
 
 typedef struct {
        int val;

diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index fd4aecc..6816eda 100644 (file)
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -1677,11 +1677,11 @@ read_partial_upcase_page:
        ntfs_debug("Read %llu bytes from $UpCase (expected %zu bytes).",
                        i_size, 64 * 1024 * sizeof(ntfschar));
        iput(ino);
-       down(&ntfs_lock);
+       mutex_lock(&ntfs_lock);
        if (!default_upcase) {
                ntfs_debug("Using volume specified $UpCase since default is "
                                "not present.");
-               up(&ntfs_lock);
+               mutex_unlock(&ntfs_lock);
                return TRUE;
        }
        max = default_upcase_len;
@@ -1695,12 +1695,12 @@ read_partial_upcase_page:
                vol->upcase = default_upcase;
                vol->upcase_len = max;
                ntfs_nr_upcase_users++;
-               up(&ntfs_lock);
+               mutex_unlock(&ntfs_lock);
                ntfs_debug("Volume specified $UpCase matches default. Using "
                                "default.");
                return TRUE;
        }
-       up(&ntfs_lock);
+       mutex_unlock(&ntfs_lock);
        ntfs_debug("Using volume specified $UpCase since it does not match "
                        "the default.");
        return TRUE;
@@ -1709,17 +1709,17 @@ iput_upcase_failed:
        ntfs_free(vol->upcase);
        vol->upcase = NULL;
 upcase_failed:
-       down(&ntfs_lock);
+       mutex_lock(&ntfs_lock);
        if (default_upcase) {
                vol->upcase = default_upcase;
                vol->upcase_len = default_upcase_len;
                ntfs_nr_upcase_users++;
-               up(&ntfs_lock);
+               mutex_unlock(&ntfs_lock);
                ntfs_error(sb, "Failed to load $UpCase from the volume. Using "
                                "default.");
                return TRUE;
        }
-       up(&ntfs_lock);
+       mutex_unlock(&ntfs_lock);
        ntfs_error(sb, "Failed to initialize upcase table.");
        return FALSE;
 }
@@ -2195,12 +2195,12 @@ iput_attrdef_err_out:
 iput_upcase_err_out:
 #endif /* NTFS_RW */
        vol->upcase_len = 0;
-       down(&ntfs_lock);
+       mutex_lock(&ntfs_lock);
        if (vol->upcase == default_upcase) {
                ntfs_nr_upcase_users--;
                vol->upcase = NULL;
        }
-       up(&ntfs_lock);
+       mutex_unlock(&ntfs_lock);
        if (vol->upcase) {
                ntfs_free(vol->upcase);
                vol->upcase = NULL;
@@ -2405,7 +2405,7 @@ static void ntfs_put_super(struct super_block *sb)
         * Destroy the global default upcase table if necessary.  Also decrease
         * the number of upcase users if we are a user.
         */
-       down(&ntfs_lock);
+       mutex_lock(&ntfs_lock);
        if (vol->upcase == default_upcase) {
                ntfs_nr_upcase_users--;
                vol->upcase = NULL;
@@ -2416,7 +2416,7 @@ static void ntfs_put_super(struct super_block *sb)
        }
        if (vol->cluster_size <= 4096 && !--ntfs_nr_compression_users)
                free_compression_buffers();
-       up(&ntfs_lock);
+       mutex_unlock(&ntfs_lock);
        if (vol->upcase) {
                ntfs_free(vol->upcase);
                vol->upcase = NULL;
@@ -2890,7 +2890,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
                        ntfs_error(sb, "Failed to load essential metadata.");
                goto iput_tmp_ino_err_out_now;
        }
-       down(&ntfs_lock);
+       mutex_lock(&ntfs_lock);
        /*
         * The current mount is a compression user if the cluster size is
         * less than or equal 4kiB.
@@ -2901,7 +2901,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
                        ntfs_error(NULL, "Failed to allocate buffers "
                                        "for compression engine.");
                        ntfs_nr_compression_users--;
-                       up(&ntfs_lock);
+                       mutex_unlock(&ntfs_lock);
                        goto iput_tmp_ino_err_out_now;
                }
        }
@@ -2913,7 +2913,7 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
        if (!default_upcase)
                default_upcase = generate_default_upcase();
        ntfs_nr_upcase_users++;
-       up(&ntfs_lock);
+       mutex_unlock(&ntfs_lock);
        /*
         * From now on, ignore @silent parameter. If we fail below this line,
         * it will be due to a corrupt fs or a system error, so we report it.
@@ -2931,12 +2931,12 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
                atomic_inc(&vol->root_ino->i_count);
                ntfs_debug("Exiting, status successful.");
                /* Release the default upcase if it has no users. */
-               down(&ntfs_lock);
+               mutex_lock(&ntfs_lock);
                if (!--ntfs_nr_upcase_users && default_upcase) {
                        ntfs_free(default_upcase);
                        default_upcase = NULL;
                }
-               up(&ntfs_lock);
+               mutex_unlock(&ntfs_lock);
                sb->s_export_op = &ntfs_export_ops;
                lock_kernel();
                return 0;
@@ -3004,12 +3004,12 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
                vol->attrdef = NULL;
        }
        vol->upcase_len = 0;
-       down(&ntfs_lock);
+       mutex_lock(&ntfs_lock);
        if (vol->upcase == default_upcase) {
                ntfs_nr_upcase_users--;
                vol->upcase = NULL;
        }
-       up(&ntfs_lock);
+       mutex_unlock(&ntfs_lock);
        if (vol->upcase) {
                ntfs_free(vol->upcase);
                vol->upcase = NULL;
@@ -3024,14 +3024,14 @@ unl_upcase_iput_tmp_ino_err_out_now:
         * Decrease the number of upcase users and destroy the global default
         * upcase table if necessary.
         */
-       down(&ntfs_lock);
+       mutex_lock(&ntfs_lock);
        if (!--ntfs_nr_upcase_users && default_upcase) {
                ntfs_free(default_upcase);
                default_upcase = NULL;
        }
        if (vol->cluster_size <= 4096 && !--ntfs_nr_compression_users)
                free_compression_buffers();
-       up(&ntfs_lock);
+       mutex_unlock(&ntfs_lock);
 iput_tmp_ino_err_out_now:
        iput(tmp_ino);
        if (vol->mft_ino && vol->mft_ino != tmp_ino)
@@ -3091,7 +3091,7 @@ struct kmem_cache *ntfs_attr_ctx_cache;
 struct kmem_cache *ntfs_index_ctx_cache;
 
 /* Driver wide semaphore. */
-DECLARE_MUTEX(ntfs_lock);
+DEFINE_MUTEX(ntfs_lock);
 
 static struct super_block *ntfs_get_sb(struct file_system_type *fs_type,
        int flags, const char *dev_name, void *data)