[PATCH] mutex subsystem, semaphore to mutex: VFS, ->i_sem

This patch converts the inode semaphore to a mutex. I have tested it on
XFS and compiled as much as one can consider on an ia64. Anyway your
luck with it might be different.

Modified-by: Ingo Molnar <mingo@elte.hu>

(finished the conversion)

Signed-off-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

7 files changed, 37 insertions, 37 deletions

diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 7892a865b58a..127e7d2cabdd 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -49,7 +49,7 @@ static int reiserfs_file_release(struct inode *inode, struct file *filp)
         }
 
         reiserfs_write_lock(inode->i_sb);
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         /* freeing preallocation only involves relogging blocks that
          * are already in the current transaction.  preallocation gets
          * freed at the end of each transaction, so it is impossible for
@@ -100,7 +100,7 @@ static int reiserfs_file_release(struct inode *inode, struct file *filp)
                 err = reiserfs_truncate_file(inode, 0);
         }
       out:
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         reiserfs_write_unlock(inode->i_sb);
         return err;
 }
@@ -1342,7 +1342,7 @@ static ssize_t reiserfs_file_write(struct file *file,	/* the file we are going t
         if (unlikely(!access_ok(VERIFY_READ, buf, count)))
                 return -EFAULT;
 
-        down(&inode->i_sem);    // locks the entire file for just us
+        mutex_lock(&inode->i_mutex);    // locks the entire file for just us
 
         pos = *ppos;
 
@@ -1532,12 +1532,12 @@ static ssize_t reiserfs_file_write(struct file *file,	/* the file we are going t
                     generic_osync_inode(inode, file->f_mapping,
                                         OSYNC_METADATA | OSYNC_DATA);
 
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         reiserfs_async_progress_wait(inode->i_sb);
         return (already_written != 0) ? already_written : res;
 
       out:
-        up(&inode->i_sem);      // unlock the file on exit.
+        mutex_unlock(&inode->i_mutex);  // unlock the file on exit.
         return res;
 }
 
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index a5e3a0ddbe53..ffa34b861bdb 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -40,12 +40,12 @@ void reiserfs_delete_inode(struct inode *inode)
 
         /* The = 0 happens when we abort creating a new inode for some reason like lack of space.. */
         if (!(inode->i_state & I_NEW) && INODE_PKEY(inode)->k_objectid != 0) {  /* also handles bad_inode case */
-                down(&inode->i_sem);
+                mutex_lock(&inode->i_mutex);
 
                 reiserfs_delete_xattrs(inode);
 
                 if (journal_begin(&th, inode->i_sb, jbegin_count)) {
-                        up(&inode->i_sem);
+                        mutex_unlock(&inode->i_mutex);
                         goto out;
                 }
                 reiserfs_update_inode_transaction(inode);
@@ -59,11 +59,11 @@ void reiserfs_delete_inode(struct inode *inode)
                         DQUOT_FREE_INODE(inode);
 
                 if (journal_end(&th, inode->i_sb, jbegin_count)) {
-                        up(&inode->i_sem);
+                        mutex_unlock(&inode->i_mutex);
                         goto out;
                 }
 
-                up(&inode->i_sem);
+                mutex_unlock(&inode->i_mutex);
 
                 /* check return value from reiserfs_delete_object after
                  * ending the transaction
@@ -551,7 +551,7 @@ static int convert_tail_for_hole(struct inode *inode,
 
         /* we don't have to make sure the conversion did not happen while
          ** we were locking the page because anyone that could convert
-         ** must first take i_sem.
+         ** must first take i_mutex.
          **
          ** We must fix the tail page for writing because it might have buffers
          ** that are mapped, but have a block number of 0.  This indicates tail
@@ -586,7 +586,7 @@ static inline int _allocate_block(struct reiserfs_transaction_handle *th,
         BUG_ON(!th->t_trans_id);
 
 #ifdef REISERFS_PREALLOCATE
-        if (!(flags & GET_BLOCK_NO_ISEM)) {
+        if (!(flags & GET_BLOCK_NO_IMUX)) {
                 return reiserfs_new_unf_blocknrs2(th, inode, allocated_block_nr,
                                                   path, block);
         }
@@ -2318,7 +2318,7 @@ static int map_block_for_writepage(struct inode *inode,
         /* this is where we fill in holes in the file. */
         if (use_get_block) {
                 retval = reiserfs_get_block(inode, block, bh_result,
-                                            GET_BLOCK_CREATE | GET_BLOCK_NO_ISEM
+                                            GET_BLOCK_CREATE | GET_BLOCK_NO_IMUX
                                             | GET_BLOCK_NO_DANGLE);
                 if (!retval) {
                         if (!buffer_mapped(bh_result)
diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
index 81fc00285f60..ba8bf8df6dc7 100644
--- a/fs/reiserfs/ioctl.c
+++ b/fs/reiserfs/ioctl.c
@@ -120,7 +120,7 @@ static int reiserfs_unpack(struct inode *inode, struct file *filp)
         /* we need to make sure nobody is changing the file size beneath
          ** us
          */
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
 
         write_from = inode->i_size & (blocksize - 1);
         /* if we are on a block boundary, we are already unpacked.  */
@@ -156,7 +156,7 @@ static int reiserfs_unpack(struct inode *inode, struct file *filp)
         page_cache_release(page);
 
       out:
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         reiserfs_write_unlock(inode->i_sb);
         return retval;
 }
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 42afb5bef111..397d9590c8f2 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -2211,7 +2211,7 @@ static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
         size_t towrite = len;
         struct buffer_head tmp_bh, *bh;
 
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
         while (towrite > 0) {
                 tocopy = sb->s_blocksize - offset < towrite ?
                     sb->s_blocksize - offset : towrite;
@@ -2250,7 +2250,7 @@ static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
         inode->i_version++;
         inode->i_mtime = inode->i_ctime = CURRENT_TIME;
         mark_inode_dirty(inode);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
         return len - towrite;
 }
 
diff --git a/fs/reiserfs/tail_conversion.c b/fs/reiserfs/tail_conversion.c
index c92e124f628e..196e971c03c9 100644
--- a/fs/reiserfs/tail_conversion.c
+++ b/fs/reiserfs/tail_conversion.c
@@ -205,7 +205,7 @@ int indirect2direct(struct reiserfs_transaction_handle *th, struct inode *p_s_in
                                          1) * p_s_sb->s_blocksize;
         pos1 = pos;
 
-        // we are protected by i_sem. The tail can not disapper, not
+        // we are protected by i_mutex. The tail can not disapper, not
         // append can be done either
         // we are in truncate or packing tail in file_release
 
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 02091eaac0b4..f1895f0a278e 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -67,11 +67,11 @@ static struct dentry *create_xa_root(struct super_block *sb)
                 goto out;
         } else if (!xaroot->d_inode) {
                 int err;
-                down(&privroot->d_inode->i_sem);
+                mutex_lock(&privroot->d_inode->i_mutex);
                 err =
                     privroot->d_inode->i_op->mkdir(privroot->d_inode, xaroot,
                                                    0700);
-                up(&privroot->d_inode->i_sem);
+                mutex_unlock(&privroot->d_inode->i_mutex);
 
                 if (err) {
                         dput(xaroot);
@@ -219,7 +219,7 @@ static struct dentry *get_xa_file_dentry(const struct inode *inode,
         } else if (flags & XATTR_REPLACE || flags & FL_READONLY) {
                 goto out;
         } else {
-                /* inode->i_sem is down, so nothing else can try to create
+                /* inode->i_mutex is down, so nothing else can try to create
                  * the same xattr */
                 err = xadir->d_inode->i_op->create(xadir->d_inode, xafile,
                                                    0700 | S_IFREG, NULL);
@@ -268,7 +268,7 @@ static struct file *open_xa_file(const struct inode *inode, const char *name,
  * and don't mess with f->f_pos, but the idea is the same.  Do some
  * action on each and every entry in the directory.
  *
- * we're called with i_sem held, so there are no worries about the directory
+ * we're called with i_mutex held, so there are no worries about the directory
  * changing underneath us.
  */
 static int __xattr_readdir(struct file *filp, void *dirent, filldir_t filldir)
@@ -426,7 +426,7 @@ int xattr_readdir(struct file *file, filldir_t filler, void *buf)
         int res = -ENOTDIR;
         if (!file->f_op || !file->f_op->readdir)
                 goto out;
-        down(&inode->i_sem);
+        mutex_lock(&inode->i_mutex);
 //        down(&inode->i_zombie);
         res = -ENOENT;
         if (!IS_DEADDIR(inode)) {
@@ -435,7 +435,7 @@ int xattr_readdir(struct file *file, filldir_t filler, void *buf)
                 unlock_kernel();
         }
 //        up(&inode->i_zombie);
-        up(&inode->i_sem);
+        mutex_unlock(&inode->i_mutex);
       out:
         return res;
 }
@@ -480,7 +480,7 @@ static inline __u32 xattr_hash(const char *msg, int len)
 /* Generic extended attribute operations that can be used by xa plugins */
 
 /*
- * inode->i_sem: down
+ * inode->i_mutex: down
  */
 int
 reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
@@ -535,7 +535,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
         /* Resize it so we're ok to write there */
         newattrs.ia_size = buffer_size;
         newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
-        down(&xinode->i_sem);
+        mutex_lock(&xinode->i_mutex);
         err = notify_change(fp->f_dentry, &newattrs);
         if (err)
                 goto out_filp;
@@ -598,7 +598,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
         }
 
       out_filp:
-        up(&xinode->i_sem);
+        mutex_unlock(&xinode->i_mutex);
         fput(fp);
 
       out:
@@ -606,7 +606,7 @@ reiserfs_xattr_set(struct inode *inode, const char *name, const void *buffer,
 }
 
 /*
- * inode->i_sem: down
+ * inode->i_mutex: down
  */
 int
 reiserfs_xattr_get(const struct inode *inode, const char *name, void *buffer,
@@ -793,7 +793,7 @@ reiserfs_delete_xattrs_filler(void *buf, const char *name, int namelen,
 
 }
 
-/* This is called w/ inode->i_sem downed */
+/* This is called w/ inode->i_mutex downed */
 int reiserfs_delete_xattrs(struct inode *inode)
 {
         struct file *fp;
@@ -946,7 +946,7 @@ int reiserfs_chown_xattrs(struct inode *inode, struct iattr *attrs)
 
 /*
  * Inode operation getxattr()
- * Preliminary locking: we down dentry->d_inode->i_sem
+ * Preliminary locking: we down dentry->d_inode->i_mutex
  */
 ssize_t
 reiserfs_getxattr(struct dentry * dentry, const char *name, void *buffer,
@@ -970,7 +970,7 @@ reiserfs_getxattr(struct dentry * dentry, const char *name, void *buffer,
 /*
  * Inode operation setxattr()
  *
- * dentry->d_inode->i_sem down
+ * dentry->d_inode->i_mutex down
  */
 int
 reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value,
@@ -1008,7 +1008,7 @@ reiserfs_setxattr(struct dentry *dentry, const char *name, const void *value,
 /*
  * Inode operation removexattr()
  *
- * dentry->d_inode->i_sem down
+ * dentry->d_inode->i_mutex down
  */
 int reiserfs_removexattr(struct dentry *dentry, const char *name)
 {
@@ -1091,7 +1091,7 @@ reiserfs_listxattr_filler(void *buf, const char *name, int namelen,
 /*
  * Inode operation listxattr()
  *
- * Preliminary locking: we down dentry->d_inode->i_sem
+ * Preliminary locking: we down dentry->d_inode->i_mutex
  */
 ssize_t reiserfs_listxattr(struct dentry * dentry, char *buffer, size_t size)
 {
@@ -1289,9 +1289,9 @@ int reiserfs_xattr_init(struct super_block *s, int mount_flags)
                 if (!IS_ERR(dentry)) {
                         if (!(mount_flags & MS_RDONLY) && !dentry->d_inode) {
                                 struct inode *inode = dentry->d_parent->d_inode;
-                                down(&inode->i_sem);
+                                mutex_lock(&inode->i_mutex);
                                 err = inode->i_op->mkdir(inode, dentry, 0700);
-                                up(&inode->i_sem);
+                                mutex_unlock(&inode->i_mutex);
                                 if (err) {
                                         dput(dentry);
                                         dentry = NULL;
diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c
index a47ac9aac8b2..2dc953504cc0 100644
--- a/fs/reiserfs/xattr_acl.c
+++ b/fs/reiserfs/xattr_acl.c
@@ -174,7 +174,7 @@ static void *posix_acl_to_disk(const struct posix_acl *acl, size_t * size)
 /*
  * Inode operation get_posix_acl().
  *
- * inode->i_sem: down
+ * inode->i_mutex: down
  * BKL held [before 2.5.x]
  */
 struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
@@ -237,7 +237,7 @@ struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
 /*
  * Inode operation set_posix_acl().
  *
- * inode->i_sem: down
+ * inode->i_mutex: down
  * BKL held [before 2.5.x]
  */
 static int
@@ -312,7 +312,7 @@ reiserfs_set_acl(struct inode *inode, int type, struct posix_acl *acl)
         return error;
 }
 
-/* dir->i_sem: down,
+/* dir->i_mutex: locked,
  * inode is new and not released into the wild yet */
 int
 reiserfs_inherit_default_acl(struct inode *dir, struct dentry *dentry,