linux/fs/9p/vfs_dentry.c
Alexey Dobriyan e8edc6e03a Detach sched.h from mm.h
First thing mm.h does is including sched.h solely for can_do_mlock() inline
function which has "current" dereference inside. By dealing with can_do_mlock()
mm.h can be detached from sched.h which is good. See below, why.

This patch
a) removes unconditional inclusion of sched.h from mm.h
b) makes can_do_mlock() normal function in mm/mlock.c
c) exports can_do_mlock() to not break compilation
d) adds sched.h inclusions back to files that were getting it indirectly.
e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
   getting them indirectly

Net result is:
a) mm.h users would get less code to open, read, preprocess, parse, ... if
   they don't need sched.h
b) sched.h stops being dependency for significant number of files:
   on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
   after patch it's only 3744 (-8.3%).

Cross-compile tested on

	all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
	alpha alpha-up
	arm
	i386 i386-up i386-defconfig i386-allnoconfig
	ia64 ia64-up
	m68k
	mips
	parisc parisc-up
	powerpc powerpc-up
	s390 s390-up
	sparc sparc-up
	sparc64 sparc64-up
	um-x86_64
	x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig

as well as my two usual configs.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-21 09:18:19 -07:00

119 lines
3 KiB
C

/*
* linux/fs/9p/vfs_dentry.c
*
* This file contians vfs dentry ops for the 9P2000 protocol.
*
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to:
* Free Software Foundation
* 51 Franklin Street, Fifth Floor
* Boston, MA 02111-1301 USA
*
*/
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/pagemap.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/inet.h>
#include <linux/namei.h>
#include <linux/idr.h>
#include <linux/sched.h>
#include "debug.h"
#include "v9fs.h"
#include "9p.h"
#include "v9fs_vfs.h"
#include "fid.h"
/**
* v9fs_dentry_delete - called when dentry refcount equals 0
* @dentry: dentry in question
*
* By returning 1 here we should remove cacheing of unused
* dentry components.
*
*/
static int v9fs_dentry_delete(struct dentry *dentry)
{
dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
return 1;
}
/**
* v9fs_cached_dentry_delete - called when dentry refcount equals 0
* @dentry: dentry in question
*
* Only return 1 if our inode is invalid. Only non-synthetic files
* (ones without mtime == 0) should be calling this function.
*
*/
static int v9fs_cached_dentry_delete(struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
if(!inode)
return 1;
return 0;
}
/**
* v9fs_dentry_release - called when dentry is going to be freed
* @dentry: dentry that is being release
*
*/
void v9fs_dentry_release(struct dentry *dentry)
{
int err;
dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
if (dentry->d_fsdata != NULL) {
struct list_head *fid_list = dentry->d_fsdata;
struct v9fs_fid *temp = NULL;
struct v9fs_fid *current_fid = NULL;
list_for_each_entry_safe(current_fid, temp, fid_list, list) {
err = v9fs_t_clunk(current_fid->v9ses, current_fid->fid);
if (err < 0)
dprintk(DEBUG_ERROR, "clunk failed: %d name %s\n",
err, dentry->d_iname);
v9fs_fid_destroy(current_fid);
}
kfree(dentry->d_fsdata); /* free the list_head */
}
}
struct dentry_operations v9fs_cached_dentry_operations = {
.d_delete = v9fs_cached_dentry_delete,
.d_release = v9fs_dentry_release,
};
struct dentry_operations v9fs_dentry_operations = {
.d_delete = v9fs_dentry_delete,
.d_release = v9fs_dentry_release,
};