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Subject[PATCH][HACK] make romfs use private superblock
Or actually no sb at all :)

--- 1.18/fs/romfs/inode.c Wed Apr 24 17:50:15 2002
+++ edited/fs/romfs/inode.c Tue May 7 20:57:34 2002
@@ -82,6 +82,12 @@
struct inode vfs_inode;
};

+/* instead of private superblock data */
+static inline unsigned long romfs_maxsize(struct super_block *sb)
+{
+ return (unsigned long)sb->u.generic_sbp;
+}
+
static inline struct romfs_inode_info *ROMFS_I(struct inode *inode)
{
return list_entry(inode, struct romfs_inode_info, vfs_inode);
@@ -138,7 +144,7 @@
}

s->s_magic = ROMFS_MAGIC;
- s->u.romfs_sb.s_maxsize = sz;
+ s->u_generic_sbp = (void *)sz;

s->s_flags |= MS_RDONLY;

@@ -174,7 +180,7 @@
buf->f_type = ROMFS_MAGIC;
buf->f_bsize = ROMBSIZE;
buf->f_bfree = buf->f_bavail = buf->f_ffree;
- buf->f_blocks = (sb->u.romfs_sb.s_maxsize+ROMBSIZE-1)>>ROMBSBITS;
+ buf->f_blocks = (romfs_maxsize(sb)+ROMBSIZE-1)>>ROMBSBITS;
buf->f_namelen = ROMFS_MAXFN;
return 0;
}
@@ -187,7 +193,7 @@
struct buffer_head *bh;
unsigned long avail, maxsize, res;

- maxsize = i->i_sb->u.romfs_sb.s_maxsize;
+ maxsize = romfs_maxsize(i->i_sb);
if (offset >= maxsize)
return -1;

@@ -229,7 +235,7 @@
struct buffer_head *bh;
unsigned long avail, maxsize, res;

- maxsize = i->i_sb->u.romfs_sb.s_maxsize;
+ maxsize = romfs_maxsize(i->i_sb);
if (offset >= maxsize || count > maxsize || offset+count>maxsize)
return -1;

@@ -275,7 +281,7 @@

lock_kernel();

- maxoff = i->i_sb->u.romfs_sb.s_maxsize;
+ maxoff = romfs_maxsize(i->i_sb);

offset = filp->f_pos;
if (!offset) {
@@ -338,7 +344,7 @@
if (romfs_copyfrom(dir, &ri, offset, ROMFH_SIZE) <= 0)
goto out;

- maxoff = dir->i_sb->u.romfs_sb.s_maxsize;
+ maxoff = romfs_maxsize(dir->i_sb);
offset = ntohl(ri.spec) & ROMFH_MASK;

/* OK, now find the file whose name is in "dentry" in the
===== include/linux/fs.h 1.108 vs edited =====
--- 1.108/include/linux/fs.h Tue Apr 30 22:58:45 2002
+++ edited/include/linux/fs.h Tue May 7 20:52:05 2002
@@ -607,7 +607,6 @@
#include <linux/ext3_fs_sb.h>
#include <linux/hpfs_fs_sb.h>
#include <linux/ufs_fs_sb.h>
-#include <linux/romfs_fs_sb.h>
#include <linux/adfs_fs_sb.h>

extern struct list_head super_blocks;
@@ -651,7 +650,6 @@
struct ext3_sb_info ext3_sb;
struct hpfs_sb_info hpfs_sb;
struct ufs_sb_info ufs_sb;
- struct romfs_sb_info romfs_sb;
struct adfs_sb_info adfs_sb;
void *generic_sbp;
} u;
--- include/linux/romfs_fs_sb.h Tue May 7 20:58:57 2002
+++ /dev/null Thu Dec 13 11:34:58 2001
@@ -1,10 +0,0 @@
-#ifndef __ROMFS_FS_SB
-#define __ROMFS_FS_SB
-
-/* romfs superblock in-core data */
-
-struct romfs_sb_info {
- unsigned long s_maxsize;
-};
-
-#endif
-
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