proc: introduce proc_create_seq{,_data}

Variants of proc_create{,_data} that directly take a struct seq_operations
argument and drastically reduces the boilerplate code in the callers.

All trivial callers converted over.

Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 2 insertions, 17 deletions

diff --git a/fs/cachefiles/proc.c b/fs/cachefiles/proc.c
index 125b90f6c796..0ce1aa56b67f 100644
--- a/fs/cachefiles/proc.c
+++ b/fs/cachefiles/proc.c
@@ -85,21 +85,6 @@ static const struct seq_operations cachefiles_histogram_ops = {
 };
 
 /*
- * open "/proc/fs/cachefiles/XXX" which provide statistics summaries
- */
-static int cachefiles_histogram_open(struct inode *inode, struct file *file)
-{
-        return seq_open(file, &cachefiles_histogram_ops);
-}
-
-static const struct file_operations cachefiles_histogram_fops = {
-        .open           = cachefiles_histogram_open,
-        .read           = seq_read,
-        .llseek         = seq_lseek,
-        .release        = seq_release,
-};
-
-/*
  * initialise the /proc/fs/cachefiles/ directory
  */
 int __init cachefiles_proc_init(void)
@@ -109,8 +94,8 @@ int __init cachefiles_proc_init(void)
         if (!proc_mkdir("fs/cachefiles", NULL))
                 goto error_dir;
 
-        if (!proc_create("fs/cachefiles/histogram", S_IFREG | 0444, NULL,
-                         &cachefiles_histogram_fops))
+        if (!proc_create_seq("fs/cachefiles/histogram", S_IFREG | 0444, NULL,
+                         &cachefiles_histogram_ops))
                 goto error_histogram;
 
         _leave(" = 0");