drivers: Remove CONFIG_OPROFILE support

The "oprofile" user-space tools don't use the kernel OPROFILE support
any more, and haven't in a long time. User-space has been converted to
the perf interfaces.

Remove kernel's old oprofile support.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Robert Richter <rric@kernel.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org> #RCU
Acked-by: William Cohen <wcohen@redhat.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 0 insertions, 300 deletions

diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c
deleted file mode 100644
index 0875f2f122b3..000000000000
--- a/drivers/oprofile/oprofilefs.c
+++ /dev/null
@@ -1,300 +0,0 @@
-/**
- * @file oprofilefs.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon
- *
- * A simple filesystem for configuration and
- * access of oprofile.
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/oprofile.h>
-#include <linux/fs.h>
-#include <linux/fs_context.h>
-#include <linux/pagemap.h>
-#include <linux/uaccess.h>
-
-#include "oprof.h"
-
-#define OPROFILEFS_MAGIC 0x6f70726f
-
-DEFINE_RAW_SPINLOCK(oprofilefs_lock);
-
-static struct inode *oprofilefs_get_inode(struct super_block *sb, int mode)
-{
-	struct inode *inode = new_inode(sb);
-
-	if (inode) {
-		inode->i_ino = get_next_ino();
-		inode->i_mode = mode;
-		inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
-	}
-	return inode;
-}
-
-
-static const struct super_operations s_ops = {
-	.statfs		= simple_statfs,
-	.drop_inode 	= generic_delete_inode,
-};
-
-
-ssize_t oprofilefs_str_to_user(char const *str, char __user *buf, size_t count, loff_t *offset)
-{
-	return simple_read_from_buffer(buf, count, offset, str, strlen(str));
-}
-
-
-#define TMPBUFSIZE 50
-
-ssize_t oprofilefs_ulong_to_user(unsigned long val, char __user *buf, size_t count, loff_t *offset)
-{
-	char tmpbuf[TMPBUFSIZE];
-	size_t maxlen = snprintf(tmpbuf, TMPBUFSIZE, "%lu\n", val);
-	if (maxlen > TMPBUFSIZE)
-		maxlen = TMPBUFSIZE;
-	return simple_read_from_buffer(buf, count, offset, tmpbuf, maxlen);
-}
-
-
-/*
- * Note: If oprofilefs_ulong_from_user() returns 0, then *val remains
- * unchanged and might be uninitialized. This follows write syscall
- * implementation when count is zero: "If count is zero ... [and if]
- * no errors are detected, 0 will be returned without causing any
- * other effect." (man 2 write)
- */
-int oprofilefs_ulong_from_user(unsigned long *val, char const __user *buf, size_t count)
-{
-	char tmpbuf[TMPBUFSIZE];
-	unsigned long flags;
-
-	if (!count)
-		return 0;
-
-	if (count > TMPBUFSIZE - 1)
-		return -EINVAL;
-
-	memset(tmpbuf, 0x0, TMPBUFSIZE);
-
-	if (copy_from_user(tmpbuf, buf, count))
-		return -EFAULT;
-
-	raw_spin_lock_irqsave(&oprofilefs_lock, flags);
-	*val = simple_strtoul(tmpbuf, NULL, 0);
-	raw_spin_unlock_irqrestore(&oprofilefs_lock, flags);
-	return count;
-}
-
-
-static ssize_t ulong_read_file(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
-	unsigned long *val = file->private_data;
-	return oprofilefs_ulong_to_user(*val, buf, count, offset);
-}
-
-
-static ssize_t ulong_write_file(struct file *file, char const __user *buf, size_t count, loff_t *offset)
-{
-	unsigned long value;
-	int retval;
-
-	if (*offset)
-		return -EINVAL;
-
-	retval = oprofilefs_ulong_from_user(&value, buf, count);
-	if (retval <= 0)
-		return retval;
-
-	retval = oprofile_set_ulong(file->private_data, value);
-	if (retval)
-		return retval;
-
-	return count;
-}
-
-
-static const struct file_operations ulong_fops = {
-	.read		= ulong_read_file,
-	.write		= ulong_write_file,
-	.open		= simple_open,
-	.llseek		= default_llseek,
-};
-
-
-static const struct file_operations ulong_ro_fops = {
-	.read		= ulong_read_file,
-	.open		= simple_open,
-	.llseek		= default_llseek,
-};
-
-
-static int __oprofilefs_create_file(struct dentry *root, char const *name,
-	const struct file_operations *fops, int perm, void *priv)
-{
-	struct dentry *dentry;
-	struct inode *inode;
-
-	if (!root)
-		return -ENOMEM;
-
-	inode_lock(d_inode(root));
-	dentry = d_alloc_name(root, name);
-	if (!dentry) {
-		inode_unlock(d_inode(root));
-		return -ENOMEM;
-	}
-	inode = oprofilefs_get_inode(root->d_sb, S_IFREG | perm);
-	if (!inode) {
-		dput(dentry);
-		inode_unlock(d_inode(root));
-		return -ENOMEM;
-	}
-	inode->i_fop = fops;
-	inode->i_private = priv;
-	d_add(dentry, inode);
-	inode_unlock(d_inode(root));
-	return 0;
-}
-
-
-int oprofilefs_create_ulong(struct dentry *root,
-	char const *name, unsigned long *val)
-{
-	return __oprofilefs_create_file(root, name,
-					&ulong_fops, 0644, val);
-}
-
-
-int oprofilefs_create_ro_ulong(struct dentry *root,
-	char const *name, unsigned long *val)
-{
-	return __oprofilefs_create_file(root, name,
-					&ulong_ro_fops, 0444, val);
-}
-
-
-static ssize_t atomic_read_file(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
-	atomic_t *val = file->private_data;
-	return oprofilefs_ulong_to_user(atomic_read(val), buf, count, offset);
-}
-
-
-static const struct file_operations atomic_ro_fops = {
-	.read		= atomic_read_file,
-	.open		= simple_open,
-	.llseek		= default_llseek,
-};
-
-
-int oprofilefs_create_ro_atomic(struct dentry *root,
-	char const *name, atomic_t *val)
-{
-	return __oprofilefs_create_file(root, name,
-					&atomic_ro_fops, 0444, val);
-}
-
-
-int oprofilefs_create_file(struct dentry *root,
-	char const *name, const struct file_operations *fops)
-{
-	return __oprofilefs_create_file(root, name, fops, 0644, NULL);
-}
-
-
-int oprofilefs_create_file_perm(struct dentry *root,
-	char const *name, const struct file_operations *fops, int perm)
-{
-	return __oprofilefs_create_file(root, name, fops, perm, NULL);
-}
-
-
-struct dentry *oprofilefs_mkdir(struct dentry *parent, char const *name)
-{
-	struct dentry *dentry;
-	struct inode *inode;
-
-	inode_lock(d_inode(parent));
-	dentry = d_alloc_name(parent, name);
-	if (!dentry) {
-		inode_unlock(d_inode(parent));
-		return NULL;
-	}
-	inode = oprofilefs_get_inode(parent->d_sb, S_IFDIR | 0755);
-	if (!inode) {
-		dput(dentry);
-		inode_unlock(d_inode(parent));
-		return NULL;
-	}
-	inode->i_op = &simple_dir_inode_operations;
-	inode->i_fop = &simple_dir_operations;
-	d_add(dentry, inode);
-	inode_unlock(d_inode(parent));
-	return dentry;
-}
-
-
-static int oprofilefs_fill_super(struct super_block *sb, struct fs_context *fc)
-{
-	struct inode *root_inode;
-
-	sb->s_blocksize = PAGE_SIZE;
-	sb->s_blocksize_bits = PAGE_SHIFT;
-	sb->s_magic = OPROFILEFS_MAGIC;
-	sb->s_op = &s_ops;
-	sb->s_time_gran = 1;
-
-	root_inode = oprofilefs_get_inode(sb, S_IFDIR | 0755);
-	if (!root_inode)
-		return -ENOMEM;
-	root_inode->i_op = &simple_dir_inode_operations;
-	root_inode->i_fop = &simple_dir_operations;
-	sb->s_root = d_make_root(root_inode);
-	if (!sb->s_root)
-		return -ENOMEM;
-
-	oprofile_create_files(sb->s_root);
-
-	// FIXME: verify kill_litter_super removes our dentries
-	return 0;
-}
-
-static int oprofilefs_get_tree(struct fs_context *fc)
-{
-	return get_tree_single(fc, oprofilefs_fill_super);
-}
-
-static const struct fs_context_operations oprofilefs_context_ops = {
-	.get_tree	= oprofilefs_get_tree,
-};
-
-static int oprofilefs_init_fs_context(struct fs_context *fc)
-{
-	fc->ops = &oprofilefs_context_ops;
-	return 0;
-}
-
-static struct file_system_type oprofilefs_type = {
-	.owner		= THIS_MODULE,
-	.name		= "oprofilefs",
-	.init_fs_context = oprofilefs_init_fs_context,
-	.kill_sb	= kill_litter_super,
-};
-MODULE_ALIAS_FS("oprofilefs");
-
-
-int __init oprofilefs_register(void)
-{
-	return register_filesystem(&oprofilefs_type);
-}
-
-
-void __exit oprofilefs_unregister(void)
-{
-	unregister_filesystem(&oprofilefs_type);
-}