2006-01-18 20:43:02 -05:00
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/*
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* linux/fs/9p/vfs_addr.c
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*
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* This file contians vfs address (mmap) ops for 9P2000.
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*
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* Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
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* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
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*
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* This program is free software; you can redistribute it and/or modify
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2006-03-25 06:07:28 -05:00
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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2006-01-18 20:43:02 -05:00
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to:
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* Free Software Foundation
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* 51 Franklin Street, Fifth Floor
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* Boston, MA 02111-1301 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/stat.h>
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#include <linux/string.h>
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#include <linux/inet.h>
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#include <linux/pagemap.h>
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#include <linux/idr.h>
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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>
2007-05-20 17:22:52 -04:00
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#include <linux/sched.h>
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2007-07-10 18:57:28 -04:00
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#include <net/9p/9p.h>
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#include <net/9p/client.h>
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2006-01-18 20:43:02 -05:00
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#include "v9fs.h"
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#include "v9fs_vfs.h"
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/**
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* v9fs_vfs_readpage - read an entire page in from 9P
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*
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2008-03-05 08:08:09 -05:00
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* @filp: file being read
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2006-01-18 20:43:02 -05:00
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* @page: structure to page
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*
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*/
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static int v9fs_vfs_readpage(struct file *filp, struct page *page)
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{
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2007-07-10 18:57:28 -04:00
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int retval;
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loff_t offset;
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char *buffer;
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2007-02-11 14:21:39 -05:00
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2007-07-10 18:57:28 -04:00
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P9_DPRINTK(P9_DEBUG_VFS, "\n");
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2006-01-18 20:43:02 -05:00
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buffer = kmap(page);
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2007-07-10 18:57:28 -04:00
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offset = page_offset(page);
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2006-01-18 20:43:02 -05:00
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2008-10-13 21:36:16 -04:00
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retval = v9fs_file_readn(filp, buffer, NULL, offset, PAGE_CACHE_SIZE);
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2007-07-10 18:57:28 -04:00
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if (retval < 0)
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goto done;
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2006-01-18 20:43:02 -05:00
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2007-07-10 18:57:28 -04:00
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memset(buffer + retval, 0, PAGE_CACHE_SIZE - retval);
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2006-01-18 20:43:02 -05:00
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flush_dcache_page(page);
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SetPageUptodate(page);
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retval = 0;
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2007-07-10 18:57:28 -04:00
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done:
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2006-01-18 20:43:02 -05:00
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kunmap(page);
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unlock_page(page);
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return retval;
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}
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2006-06-28 07:26:44 -04:00
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const struct address_space_operations v9fs_addr_operations = {
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2006-01-18 20:43:02 -05:00
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.readpage = v9fs_vfs_readpage,
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};
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