[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>
diff --git a/include/linux/nfsd/nfsfh.h b/include/linux/nfsd/nfsfh.h
index bb842ea..0798b77 100644
--- a/include/linux/nfsd/nfsfh.h
+++ b/include/linux/nfsd/nfsfh.h
@@ -294,7 +294,7 @@
/*
* Lock a file handle/inode
* NOTE: both fh_lock and fh_unlock are done "by hand" in
- * vfs.c:nfsd_rename as it needs to grab 2 i_sem's at once
+ * vfs.c:nfsd_rename as it needs to grab 2 i_mutex's at once
* so, any changes here should be reflected there.
*/
static inline void
@@ -317,7 +317,7 @@
}
inode = dentry->d_inode;
- down(&inode->i_sem);
+ mutex_lock(&inode->i_mutex);
fill_pre_wcc(fhp);
fhp->fh_locked = 1;
}
@@ -333,7 +333,7 @@
if (fhp->fh_locked) {
fill_post_wcc(fhp);
- up(&fhp->fh_dentry->d_inode->i_sem);
+ mutex_unlock(&fhp->fh_dentry->d_inode->i_mutex);
fhp->fh_locked = 0;
}
}