ia64: perfmon: add d_dname method

Switch ia64/perfmon to using the d_dname() instead of relying on
__d_path() to prepend the name of the root dentry to the path.

CC: Tony Luck <tony.luck@intel.com>
CC: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 8 insertions, 7 deletions

diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 744329072f33..cce050e85c73 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -2191,8 +2191,15 @@ pfmfs_delete_dentry(struct dentry *dentry)
         return 1;
 }
 
+static char *pfmfs_dname(struct dentry *dentry, char *buffer, int buflen)
+{
+        return dynamic_dname(dentry, buffer, buflen, "pfm:[%lu]",
+                             dentry->d_inode->i_ino);
+}
+
 static const struct dentry_operations pfmfs_dentry_operations = {
         .d_delete = pfmfs_delete_dentry,
+        .d_dname = pfmfs_dname,
 };
 
 
@@ -2202,8 +2209,7 @@ pfm_alloc_file(pfm_context_t *ctx)
         struct file *file;
         struct inode *inode;
         struct path path;
-        char name[32];
-        struct qstr this;
+        struct qstr this = { .name = "" };
 
         /*
          * allocate a new inode
@@ -2218,11 +2224,6 @@ pfm_alloc_file(pfm_context_t *ctx)
         inode->i_uid  = current_fsuid();
         inode->i_gid  = current_fsgid();
 
-        sprintf(name, "[%lu]", inode->i_ino);
-        this.name = name;
-        this.len  = strlen(name);
-        this.hash = inode->i_ino;
-
         /*
          * allocate a new dcache entry
          */