Re: [PATCH] tiny shmem/tmpfs replacement

From: Jeff Garzik (jgarzik_at_pobox.com)
Date: 08/31/04

  • Next message: Lee Revell: "Re: [patch] voluntary-preempt-2.6.9-rc1-bk4-Q5" 
    Date:	Tue, 31 Aug 2004 15:52:08 -0400
To: Matt Mackall <mpm@selenic.com>

    Linux Kernel Mailing List wrote:
    > ChangeSet 1.1882, 2004/08/31 10:34:47-07:00, mpm@selenic.com
    >
    > [PATCH] tiny shmem/tmpfs replacement
    >
    > A patch to replace tmpfs/shmem with ramfs for systems without swap,
    > incorporating the suggestions from Andi and Hugh. It uses ramfs instead.
    >
    > Signed-off-by: Matt Mackall <mpm@selenic.com>
    > Signed-off-by: Andrew Morton <akpm@osdl.org>
    > Signed-off-by: Linus Torvalds <torvalds@osdl.org>

    this change needs lib-izing...

    > diff -Nru a/fs/ramfs/inode.c b/fs/ramfs/inode.c
    > --- a/fs/ramfs/inode.c 2004-08-31 12:14:15 -07:00
    > +++ b/fs/ramfs/inode.c 2004-08-31 12:14:15 -07:00
    > @@ -31,6 +31,7 @@
    > #include <linux/string.h>
    > #include <linux/smp_lock.h>
    > #include <linux/backing-dev.h>
    > +#include <linux/ramfs.h>
    >
    > #include <asm/uaccess.h>
    >
    > @@ -39,7 +40,6 @@
    >
    > static struct super_operations ramfs_ops;
    > static struct address_space_operations ramfs_aops;
    > -static struct file_operations ramfs_file_operations;
    > static struct inode_operations ramfs_file_inode_operations;
    > static struct inode_operations ramfs_dir_inode_operations;
    >
    > @@ -48,7 +48,7 @@
    > .memory_backed = 1, /* Does not contribute to dirty memory */
    > };
    >
    > -static struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev)
    > +struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev)
    > {
    > struct inode * inode = new_inode(sb);
    >
    > @@ -146,7 +146,7 @@
    > .commit_write = simple_commit_write
    > };
    >
    > -static struct file_operations ramfs_file_operations = {
    > +struct file_operations ramfs_file_operations = {
    > .read = generic_file_read,
    > .write = generic_file_write,
    > .mmap = generic_file_mmap,
    > @@ -199,7 +199,7 @@
    > return 0;
    > }
    >
    > -static struct super_block *ramfs_get_sb(struct file_system_type *fs_type,
    > +struct super_block *ramfs_get_sb(struct file_system_type *fs_type,
    > int flags, const char *dev_name, void *data)
    > {
    > return get_sb_nodev(fs_type, flags, data, ramfs_fill_super);
    > diff -Nru a/include/linux/ramfs.h b/include/linux/ramfs.h
    > --- /dev/null Wed Dec 31 16:00:00 196900
    > +++ b/include/linux/ramfs.h 2004-08-31 12:14:15 -07:00
    > @@ -0,0 +1,11 @@
    > +#ifndef _LINUX_RAMFS_H
    > +#define _LINUX_RAMFS_H
    > +
    > +struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev);
    > +struct super_block *ramfs_get_sb(struct file_system_type *fs_type,
    > + int flags, const char *dev_name, void *data);
    > +
    > +extern struct file_operations ramfs_file_operations;
    > +extern struct vm_operations_struct generic_file_vm_ops;
    > +
    > +#endif
    > diff -Nru a/mm/filemap.c b/mm/filemap.c
    > --- a/mm/filemap.c 2004-08-31 12:14:15 -07:00
    > +++ b/mm/filemap.c 2004-08-31 12:14:15 -07:00
    > @@ -1488,7 +1488,7 @@
    > return 0;
    > }
    >
    > -static struct vm_operations_struct generic_file_vm_ops = {
    > +struct vm_operations_struct generic_file_vm_ops = {
    > .nopage = filemap_nopage,
    > .populate = filemap_populate,
    > };

    a lot of this is libfs material, for example.

            Jeff

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