litmus-rt.git - The LITMUS^RT kernel.

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The LITMUS^RT kernel.

Bjoern Brandenburg

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012-07-14 08:32:45 -0400 affs: get rid of affs_sync_super' href='/cgit/cgit.cgi/litmus-rt.git/commit/fs/affs/super.c?id=3dd847820d138c9d60764b0e920380373285ff10'>3dd847820d13

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/*
 *  linux/fs/affs/inode.c
 *
 *  (c) 1996  Hans-Joachim Widmaier - Rewritten
 *
 *  (C) 1993  Ray Burr - Modified for Amiga FFS filesystem.
 *
 *  (C) 1992  Eric Youngdale Modified for ISO 9660 filesystem.
 *
 *  (C) 1991  Linus Torvalds - minix filesystem
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/statfs.h>
#include <linux/parser.h>
#include <linux/magic.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/writeback.h>
#include "affs.h"

static int affs_statfs(struct dentry *dentry, struct kstatfs *buf);
static int affs_remount (struct super_block *sb, int *flags, char *data);

static void
affs_commit_super(struct super_block *sb, int wait)
{
	struct affs_sb_info *sbi = AFFS_SB(sb);
	struct buffer_head *bh = sbi->s_root_bh;
	struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh);

	lock_buffer(bh);
	secs_to_datestamp(get_seconds(), &tail->disk_change);
	affs_fix_checksum(sb, bh);
	unlock_buffer(bh);

	mark_buffer_dirty(bh);
	if (wait)
		sync_dirty_buffer(bh);
}

static void
affs_put_super(struct super_block *sb)
{
	struct affs_sb_info *sbi = AFFS_SB(sb);
	pr_debug("%s()\n", __func__);

	cancel_delayed_work_sync(&sbi->sb_work);
}

static int
affs_sync_fs(struct super_block *sb, int wait)
{
	affs_commit_super(sb, wait);
	return 0;
}

static void flush_superblock(struct work_struct *work)
{
	struct affs_sb_info *sbi;
	struct super_block *sb;

	sbi = container_of(work, struct affs_sb_info, sb_work.work);
	sb = sbi->sb;

	spin_lock(&sbi->work_lock);
	sbi->work_queued = 0;
	spin_unlock(&sbi->work_lock);

	affs_commit_super(sb, 1);
}

void affs_mark_sb_dirty(struct super_block *sb)
{
	struct affs_sb_info *sbi = AFFS_SB(sb);
	unsigned long delay;

	if (sb->s_flags & MS_RDONLY)
	       return;

	spin_lock(&sbi->work_lock);
	if (!sbi->work_queued) {
	       delay = msecs_to_jiffies(dirty_writeback_interval * 10);
	       queue_delayed_work(system_long_wq, &sbi->sb_work, delay);
	       sbi->work_queued = 1;
	}
	spin_unlock(&sbi->work_lock);
}

static struct kmem_cache * affs_inode_cachep;

static struct inode *affs_alloc_inode(struct super_block *sb)
{
	struct affs_inode_info *i;

	i = kmem_cache_alloc(affs_inode_cachep, GFP_KERNEL);
	if (!i)
		return NULL;

	i->vfs_inode.i_version = 1;
	i->i_lc = NULL;
	i->i_ext_bh = NULL;
	i->i_pa_cnt = 0;

	return &i->vfs_inode;
}

static void affs_i_callback(struct rcu_head *head)
{
	struct inode *inode = container_of(head, struct inode, i_rcu);
	kmem_cache_free(affs_inode_cachep, AFFS_I(inode));
}

static void affs_destroy_inode(struct inode *inode)
{
	call_rcu(&inode->i_rcu, affs_i_callback);
}

static void init_once(void *foo)
{
	struct affs_inode_info *ei = (struct affs_inode_info *) foo;

	sema_init(&ei->i_link_lock, 1);
	sema_init(&ei->i_ext_lock, 1);
	inode_init_once(&ei->vfs_inode);
}

static int __init init_inodecache(void)
{
	affs_inode_cachep = kmem_cache_create("affs_inode_cache",
					     sizeof(struct affs_inode_info),
					     0, (SLAB_RECLAIM_ACCOUNT|
						SLAB_MEM_SPREAD),
					     init_once);
	if (affs_inode_cachep == NULL)
		return -ENOMEM;
	return 0;
}

static void destroy_inodecache(void)
{
	/*
	 * Make sure all delayed rcu free inodes are flushed before we
	 * destroy cache.


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