[GFS2] Remove page.[ch]

The remaining routines in page.c were all only used in one other
file, so they are now moved into the files where they are referenced
and made static. Thus page.[ch] are no longer required.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

9 files changed, 184 insertions, 235 deletions

diff --git a/fs/gfs2/Makefile b/fs/gfs2/Makefile
index 0b79776..b92852b 100644
--- a/fs/gfs2/Makefile
+++ b/fs/gfs2/Makefile
@@ -2,7 +2,7 @@ obj-$(CONFIG_GFS2_FS) += gfs2.o
 gfs2-y := acl.o bmap.o daemon.o dir.o eaops.o eattr.o glock.o \
 	glops.o inode.o lm.o log.o lops.o locking.o lvb.o main.o meta_io.o \
 	mount.o ondisk.o ops_address.o ops_dentry.o ops_export.o ops_file.o \
-	ops_fstype.o ops_inode.o ops_super.o ops_vm.o page.o quota.o \
+	ops_fstype.o ops_inode.o ops_super.o ops_vm.o quota.o \
 	recovery.o rgrp.o super.o sys.o trans.o util.o
 
 obj-$(CONFIG_GFS2_FS_LOCKING_NOLOCK) += locking/nolock/
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 72b19c5..d20d41e 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -22,12 +22,12 @@
 #include "glock.h"
 #include "inode.h"
 #include "meta_io.h"
-#include "page.h"
 #include "quota.h"
 #include "rgrp.h"
 #include "trans.h"
 #include "dir.h"
 #include "util.h"
+#include "ops_address.h"
 
 /* This doesn't need to be that large as max 64 bit pointers in a 4k
  * block is 512, so __u16 is fine for that. It saves stack space to
@@ -885,6 +885,82 @@ static int do_grow(struct gfs2_inode *ip, uint64_t size)
 	return error;
 }
 
+
+/**
+ * gfs2_block_truncate_page - Deal with zeroing out data for truncate
+ *
+ * This is partly borrowed from ext3.
+ */
+static int gfs2_block_truncate_page(struct address_space *mapping)
+{
+	struct inode *inode = mapping->host;
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_sbd *sdp = GFS2_SB(inode);
+	loff_t from = inode->i_size;
+	unsigned long index = from >> PAGE_CACHE_SHIFT;
+	unsigned offset = from & (PAGE_CACHE_SIZE-1);
+	unsigned blocksize, iblock, length, pos;
+	struct buffer_head *bh;
+	struct page *page;
+	void *kaddr;
+	int err;
+
+	page = grab_cache_page(mapping, index);
+	if (!page)
+		return 0;
+
+	blocksize = inode->i_sb->s_blocksize;
+	length = blocksize - (offset & (blocksize - 1));
+	iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
+
+	if (!page_has_buffers(page))
+		create_empty_buffers(page, blocksize, 0);
+
+	/* Find the buffer that contains "offset" */
+	bh = page_buffers(page);
+	pos = blocksize;
+	while (offset >= pos) {
+		bh = bh->b_this_page;
+		iblock++;
+		pos += blocksize;
+	}
+
+	err = 0;
+
+	if (!buffer_mapped(bh)) {
+		gfs2_get_block(inode, iblock, bh, 0);
+		/* unmapped? It's a hole - nothing to do */
+		if (!buffer_mapped(bh))
+			goto unlock;
+	}
+
+	/* Ok, it's mapped. Make sure it's up-to-date */
+	if (PageUptodate(page))
+		set_buffer_uptodate(bh);
+
+	if (!buffer_uptodate(bh)) {
+		err = -EIO;
+		ll_rw_block(READ, 1, &bh);
+		wait_on_buffer(bh);
+		/* Uhhuh. Read error. Complain and punt. */
+		if (!buffer_uptodate(bh))
+			goto unlock;
+	}
+
+	if (sdp->sd_args.ar_data == GFS2_DATA_ORDERED || gfs2_is_jdata(ip))
+		gfs2_trans_add_bh(ip->i_gl, bh, 0);
+
+	kaddr = kmap_atomic(page, KM_USER0);
+	memset(kaddr + offset, 0, length);
+	flush_dcache_page(page);
+	kunmap_atomic(kaddr, KM_USER0);
+
+unlock:
+	unlock_page(page);
+	page_cache_release(page);
+	return err;
+}
+
 static int trunc_start(struct gfs2_inode *ip, uint64_t size)
 {
 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index a01874c..3f909a8 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -23,11 +23,98 @@
 #include "inode.h"
 #include "log.h"
 #include "meta_io.h"
-#include "page.h"
 #include "recovery.h"
 #include "rgrp.h"
 #include "util.h"
 
+
+/**
+ * gfs2_pte_inval - Sync and invalidate all PTEs associated with a glock
+ * @gl: the glock
+ *
+ */
+
+static void gfs2_pte_inval(struct gfs2_glock *gl)
+{
+	struct gfs2_inode *ip;
+	struct inode *inode;
+
+	ip = gl->gl_object;
+	inode = &ip->i_inode;
+	if (!ip || !S_ISREG(ip->i_di.di_mode))
+		return;
+
+	if (!test_bit(GIF_PAGED, &ip->i_flags))
+		return;
+
+	unmap_shared_mapping_range(inode->i_mapping, 0, 0);
+
+	if (test_bit(GIF_SW_PAGED, &ip->i_flags))
+		set_bit(GLF_DIRTY, &gl->gl_flags);
+
+	clear_bit(GIF_SW_PAGED, &ip->i_flags);
+}
+
+/**
+ * gfs2_page_inval - Invalidate all pages associated with a glock
+ * @gl: the glock
+ *
+ */
+
+static void gfs2_page_inval(struct gfs2_glock *gl)
+{
+	struct gfs2_inode *ip;
+	struct inode *inode;
+
+	ip = gl->gl_object;
+	inode = &ip->i_inode;
+	if (!ip || !S_ISREG(ip->i_di.di_mode))
+		return;
+
+	truncate_inode_pages(inode->i_mapping, 0);
+	gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), !inode->i_mapping->nrpages);
+	clear_bit(GIF_PAGED, &ip->i_flags);
+}
+
+/**
+ * gfs2_page_sync - Sync the data pages (not metadata) associated with a glock
+ * @gl: the glock
+ * @flags: DIO_START | DIO_WAIT
+ *
+ * Syncs data (not metadata) for a regular file.
+ * No-op for all other types.
+ */
+
+static void gfs2_page_sync(struct gfs2_glock *gl, int flags)
+{
+	struct gfs2_inode *ip;
+	struct inode *inode;
+	struct address_space *mapping;
+	int error = 0;
+
+	ip = gl->gl_object;
+	inode = &ip->i_inode;
+	if (!ip || !S_ISREG(ip->i_di.di_mode))
+		return;
+
+	mapping = inode->i_mapping;
+
+	if (flags & DIO_START)
+		filemap_fdatawrite(mapping);
+	if (!error && (flags & DIO_WAIT))
+		error = filemap_fdatawait(mapping);
+
+	/* Put back any errors cleared by filemap_fdatawait()
+	   so they can be caught by someone who can pass them
+	   up to user space. */
+
+	if (error == -ENOSPC)
+		set_bit(AS_ENOSPC, &mapping->flags);
+	else if (error)
+		set_bit(AS_EIO, &mapping->flags);
+
+}
+
 /**
  * meta_go_sync - sync out the metadata for this glock
  * @gl: the glock
diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c
index 93e00a8..fca69f1 100644
--- a/fs/gfs2/ops_address.c
+++ b/fs/gfs2/ops_address.c
@@ -27,7 +27,6 @@
 #include "log.h"
 #include "meta_io.h"
 #include "ops_address.h"
-#include "page.h"
 #include "quota.h"
 #include "trans.h"
 #include "rgrp.h"
@@ -35,6 +34,24 @@
 #include "util.h"
 #include "glops.h"
 
+
+static void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page,
+				   unsigned int from, unsigned int to)
+{
+	struct buffer_head *head = page_buffers(page);
+	unsigned int bsize = head->b_size;
+	struct buffer_head *bh;
+	unsigned int start, end;
+
+	for (bh = head, start = 0; bh != head || !start;
+	     bh = bh->b_this_page, start = end) {
+		end = start + bsize;
+		if (end <= from || start >= to)
+			continue;
+		gfs2_trans_add_bh(ip->i_gl, bh, 0);
+	}
+}
+
 /**
  * gfs2_get_block - Fills in a buffer head with details about a block
  * @inode: The inode
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index caecafe..8fb7c5c 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -34,7 +34,6 @@
 #include "meta_io.h"
 #include "ops_dentry.h"
 #include "ops_inode.h"
-#include "page.h"
 #include "quota.h"
 #include "rgrp.h"
 #include "trans.h"
diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c
index 50ea7f2..730c722 100644
--- a/fs/gfs2/ops_super.c
+++ b/fs/gfs2/ops_super.c
@@ -30,7 +30,6 @@
 #include "log.h"
 #include "mount.h"
 #include "ops_super.h"
-#include "page.h"
 #include "quota.h"
 #include "recovery.h"
 #include "rgrp.h"
diff --git a/fs/gfs2/ops_vm.c b/fs/gfs2/ops_vm.c
index 910722d..aff6637 100644
--- a/fs/gfs2/ops_vm.c
+++ b/fs/gfs2/ops_vm.c
@@ -23,7 +23,6 @@
 #include "glock.h"
 #include "inode.h"
 #include "ops_vm.h"
-#include "page.h"
 #include "quota.h"
 #include "rgrp.h"
 #include "trans.h"
diff --git a/fs/gfs2/page.c b/fs/gfs2/page.c
deleted file mode 100644
index 0d6befe..0000000
--- a/fs/gfs2/page.c
+++ /dev/null
@@ -1,207 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
- */
-
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/completion.h>
-#include <linux/buffer_head.h>
-#include <linux/pagemap.h>
-#include <linux/mm.h>
-#include <linux/gfs2_ondisk.h>
-
-#include "gfs2.h"
-#include "lm_interface.h"
-#include "incore.h"
-#include "bmap.h"
-#include "inode.h"
-#include "page.h"
-#include "trans.h"
-#include "ops_address.h"
-#include "util.h"
-
-/**
- * gfs2_pte_inval - Sync and invalidate all PTEs associated with a glock
- * @gl: the glock
- *
- */
-
-void gfs2_pte_inval(struct gfs2_glock *gl)
-{
-	struct gfs2_inode *ip;
-	struct inode *inode;
-
-	ip = gl->gl_object;
-	inode = &ip->i_inode;
-	if (!ip || !S_ISREG(ip->i_di.di_mode))
-		return;
-
-	if (!test_bit(GIF_PAGED, &ip->i_flags))
-		return;
-
-	unmap_shared_mapping_range(inode->i_mapping, 0, 0);
-
-	if (test_bit(GIF_SW_PAGED, &ip->i_flags))
-		set_bit(GLF_DIRTY, &gl->gl_flags);
-
-	clear_bit(GIF_SW_PAGED, &ip->i_flags);
-}
-
-/**
- * gfs2_page_inval - Invalidate all pages associated with a glock
- * @gl: the glock
- *
- */
-
-void gfs2_page_inval(struct gfs2_glock *gl)
-{
-	struct gfs2_inode *ip;
-	struct inode *inode;
-
-	ip = gl->gl_object;
-	inode = &ip->i_inode;
-	if (!ip || !S_ISREG(ip->i_di.di_mode))
-		return;
-
-	truncate_inode_pages(inode->i_mapping, 0);
-	gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), !inode->i_mapping->nrpages);
-	clear_bit(GIF_PAGED, &ip->i_flags);
-}
-
-/**
- * gfs2_page_sync - Sync the data pages (not metadata) associated with a glock
- * @gl: the glock
- * @flags: DIO_START | DIO_WAIT
- *
- * Syncs data (not metadata) for a regular file.
- * No-op for all other types.
- */
-
-void gfs2_page_sync(struct gfs2_glock *gl, int flags)
-{
-	struct gfs2_inode *ip;
-	struct inode *inode;
-	struct address_space *mapping;
-	int error = 0;
-
-	ip = gl->gl_object;
-	inode = &ip->i_inode;
-	if (!ip || !S_ISREG(ip->i_di.di_mode))
-		return;
-
-	mapping = inode->i_mapping;
-
-	if (flags & DIO_START)
-		filemap_fdatawrite(mapping);
-	if (!error && (flags & DIO_WAIT))
-		error = filemap_fdatawait(mapping);
-
-	/* Put back any errors cleared by filemap_fdatawait()
-	   so they can be caught by someone who can pass them
-	   up to user space. */
-
-	if (error == -ENOSPC)
-		set_bit(AS_ENOSPC, &mapping->flags);
-	else if (error)
-		set_bit(AS_EIO, &mapping->flags);
-
-}
-
-/**
- * gfs2_block_truncate_page - Deal with zeroing out data for truncate
- *
- * This is partly borrowed from ext3.
- */
-int gfs2_block_truncate_page(struct address_space *mapping)
-{
-	struct inode *inode = mapping->host;
-	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_sbd *sdp = GFS2_SB(inode);
-	loff_t from = inode->i_size;
-	unsigned long index = from >> PAGE_CACHE_SHIFT;
-	unsigned offset = from & (PAGE_CACHE_SIZE-1);
-	unsigned blocksize, iblock, length, pos;
-	struct buffer_head *bh;
-	struct page *page;
-	void *kaddr;
-	int err;
-
-	page = grab_cache_page(mapping, index);
-	if (!page)
-		return 0;
-
-	blocksize = inode->i_sb->s_blocksize;
-	length = blocksize - (offset & (blocksize - 1));
-	iblock = index << (PAGE_CACHE_SHIFT - inode->i_sb->s_blocksize_bits);
-
-	if (!page_has_buffers(page))
-		create_empty_buffers(page, blocksize, 0);
-
-	/* Find the buffer that contains "offset" */
-	bh = page_buffers(page);
-	pos = blocksize;
-	while (offset >= pos) {
-		bh = bh->b_this_page;
-		iblock++;
-		pos += blocksize;
-	}
-
-	err = 0;
-
-	if (!buffer_mapped(bh)) {
-		gfs2_get_block(inode, iblock, bh, 0);
-		/* unmapped? It's a hole - nothing to do */
-		if (!buffer_mapped(bh))
-			goto unlock;
-	}
-
-	/* Ok, it's mapped. Make sure it's up-to-date */
-	if (PageUptodate(page))
-		set_buffer_uptodate(bh);
-
-	if (!buffer_uptodate(bh)) {
-		err = -EIO;
-		ll_rw_block(READ, 1, &bh);
-		wait_on_buffer(bh);
-		/* Uhhuh. Read error. Complain and punt. */
-		if (!buffer_uptodate(bh))
-			goto unlock;
-	}
-
-	if (sdp->sd_args.ar_data == GFS2_DATA_ORDERED || gfs2_is_jdata(ip))
-		gfs2_trans_add_bh(ip->i_gl, bh, 0);
-
-	kaddr = kmap_atomic(page, KM_USER0);
-	memset(kaddr + offset, 0, length);
-	flush_dcache_page(page);
-	kunmap_atomic(kaddr, KM_USER0);
-
-unlock:
-	unlock_page(page);
-	page_cache_release(page);
-	return err;
-}
-
-void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page,
-			    unsigned int from, unsigned int to)
-{
-	struct buffer_head *head = page_buffers(page);
-	unsigned int bsize = head->b_size;
-	struct buffer_head *bh;
-	unsigned int start, end;
-
-	for (bh = head, start = 0; bh != head || !start;
-	     bh = bh->b_this_page, start = end) {
-		end = start + bsize;
-		if (end <= from || start >= to)
-			continue;
-		gfs2_trans_add_bh(ip->i_gl, bh, 0);
-	}
-}
-
diff --git a/fs/gfs2/page.h b/fs/gfs2/page.h
deleted file mode 100644
index 67a4f4b..0000000
--- a/fs/gfs2/page.h
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
- * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
- */
-
-#ifndef __PAGE_DOT_H__
-#define __PAGE_DOT_H__
-
-void gfs2_pte_inval(struct gfs2_glock *gl);
-void gfs2_page_inval(struct gfs2_glock *gl);
-void gfs2_page_sync(struct gfs2_glock *gl, int flags);
-
-int gfs2_block_truncate_page(struct address_space *mapping);
-void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page,
-			    unsigned int from, unsigned int to);
-
-#endif /* __PAGE_DOT_H__ */