[PATCH 13/14] NTFS: Semaphore to mutex conversion.

From: Anton Altaparmakov
Date: Thu Mar 23 2006 - 12:27:34 EST

From: Ingo Molnar <mingo@xxxxxxx>

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@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
Signed-off-by: Anton Altaparmakov <aia21@xxxxxxxxxx>

---


Best regards,

Anton
--
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer / IRC: #ntfs on irc.freenode.net
WWW: http://linux-ntfs.sf.net/ & http://www-stu.christs.cam.ac.uk/~aia21/

fs/ntfs/ChangeLog | 1 +
fs/ntfs/aops.c | 6 +++--
fs/ntfs/compress.c | 4 ++-
fs/ntfs/inode.c | 10 ++++----
fs/ntfs/inode.h | 13 ++++++-----
fs/ntfs/mft.c | 62 ++++++++++++++++++++++++++--------------------------
fs/ntfs/ntfs.h | 2 +-
fs/ntfs/super.c | 42 ++++++++++++++++++-----------------
8 files changed, 71 insertions(+), 69 deletions(-)

4e5e529ad684f1b3fba957f5dd4eb7c2b534ee92
diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
index 9fb08ef..35cc4b1 100644
--- 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
--- 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
--- 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
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -388,7 +388,7 @@ void __ntfs_init_inode(struct super_bloc
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_bloc
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, i
*/
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, i
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, i
}
}
}
- 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
--- 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
--- 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 *n
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_i
* 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_i
}
}
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
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_volu
}
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_volu
* 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_volu
* 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_volu
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_ino
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_ino
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
--- a/fs/ntfs/ntfs.h
+++ b/fs/ntfs/ntfs.h
@@ -91,7 +91,7 @@ extern void free_compression_buffers(voi

/* 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
--- 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_
* 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_
}
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_
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_
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_
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_
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_
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)
--
1.2.3.g9821

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