[RFC: 2.6 patch] ext2: make ext2_count_free a static inline

From: Adrian Bunk (bunk_at_stusta.de)
Date: 04/30/05

  • Next message: Adrian Bunk: "[2.6 patch] drivers/char/agp/: make code static" 
    Date:	Sat, 30 Apr 2005 22:07:38 +0200
To: Andrew Morton <akpm@osdl.org>

    ext2_count_free is a small function that is only used
    #ifdef EXT2FS_DEBUG.

    We could offer the function itself only #ifdef EXT2FS_DEBUG, but what
    about this patch to change ot to a static inline?

    Signed-off-by: Adrian Bunk <bunk@stusta.de> 

    ---
This patch was already sent on:
- 23 Apr 2005
 fs/ext2/Makefile |    2 +-
 fs/ext2/bitmap.c |   25 -------------------------
 fs/ext2/ext2.h   |   18 +++++++++++++++++-
 3 files changed, 18 insertions(+), 27 deletions(-)
--- linux-2.6.12-rc2-mm3-full/fs/ext2/ext2.h.old	2005-04-20 23:08:52.000000000 +0200
+++ linux-2.6.12-rc2-mm3-full/fs/ext2/ext2.h	2005-04-20 23:14:21.000000000 +0200
@@ -1,5 +1,6 @@
 #include <linux/fs.h>
 #include <linux/ext2_fs.h>
+#include <linux/buffer_head.h>
 
 /*
  * second extended file system inode data in memory
@@ -79,6 +80,22 @@
 	return container_of(inode, struct ext2_inode_info, vfs_inode);
 }
 
+static int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
+
+static inline unsigned long ext2_count_free (struct buffer_head * map,
+					     unsigned int numchars)
+{
+	unsigned int i;
+	unsigned long sum = 0;
+	
+	if (!map) 
+		return (0);
+	for (i = 0; i < numchars; i++)
+		sum += nibblemap[map->b_data[i] & 0xf] +
+			nibblemap[(map->b_data[i] >> 4) & 0xf];
+	return (sum);
+}
+
 /* balloc.c */
 extern int ext2_bg_has_super(struct super_block *sb, int group);
 extern unsigned long ext2_bg_num_gdb(struct super_block *sb, int group);
@@ -111,7 +128,6 @@
 extern void ext2_free_inode (struct inode *);
 extern unsigned long ext2_count_free_inodes (struct super_block *);
 extern void ext2_check_inodes_bitmap (struct super_block *);
-extern unsigned long ext2_count_free (struct buffer_head *, unsigned);
 
 /* inode.c */
 extern void ext2_read_inode (struct inode *);
--- linux-2.6.12-rc2-mm3-full/fs/ext2/Makefile.old	2005-04-20 23:14:35.000000000 +0200
+++ linux-2.6.12-rc2-mm3-full/fs/ext2/Makefile	2005-04-20 23:14:45.000000000 +0200
@@ -4,7 +4,7 @@
 
 obj-$(CONFIG_EXT2_FS) += ext2.o
 
-ext2-y := balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o \
+ext2-y := balloc.o dir.o file.o fsync.o ialloc.o inode.o \
 	  ioctl.o namei.o super.o symlink.o
 
 ext2-$(CONFIG_EXT2_FS_XATTR)	 += xattr.o xattr_user.o xattr_trusted.o
--- linux-2.6.12-rc2-mm3-full/fs/ext2/bitmap.c	2005-03-02 08:38:08.000000000 +0100
+++ /dev/null	2005-03-19 22:42:59.000000000 +0100
@@ -1,25 +0,0 @@
-/*
- *  linux/fs/ext2/bitmap.c
- *
- * Copyright (C) 1992, 1993, 1994, 1995
- * Remy Card (card@masi.ibp.fr)
- * Laboratoire MASI - Institut Blaise Pascal
- * Universite Pierre et Marie Curie (Paris VI)
- */
-
-#include <linux/buffer_head.h>
-
-static int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
-
-unsigned long ext2_count_free (struct buffer_head * map, unsigned int numchars)
-{
-	unsigned int i;
-	unsigned long sum = 0;
-	
-	if (!map) 
-		return (0);
-	for (i = 0; i < numchars; i++)
-		sum += nibblemap[map->b_data[i] & 0xf] +
-			nibblemap[(map->b_data[i] >> 4) & 0xf];
-	return (sum);
-}
-
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