ext4: Combine proc file handling into a single set of functions

Previously mballoc created a separate set of functions for each proc
file.  This combines the tunables into a single set of functions which
gets used for all of the per-superblock proc files, saving
approximately 2k of compiled object code.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 16 insertions, 0 deletions

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index b9c9371d8164..163c44527dde 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -957,6 +957,22 @@ void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr,
 
 extern struct proc_dir_entry *ext4_proc_root;
 
+#ifdef CONFIG_PROC_FS
+extern const struct file_operations ext4_ui_proc_fops;
+
+#define EXT4_PROC_HANDLER(name, var)                                    \
+do {                                                                    \
+        proc = proc_create_data(name, mode, sbi->s_proc,                \
+                                &ext4_ui_proc_fops, &sbi->s_##var);     \
+        if (proc == NULL) {                                             \
+                printk(KERN_ERR "EXT4-fs: can't create %s\n", name);    \
+                goto err_out;                                           \
+        }                                                               \
+} while (0)
+#else
+#define EXT4_PROC_HANDLER(name, var)
+#endif
+
 /*
  * Function prototypes
  */