1 files changed, 0 insertions, 400 deletions
diff --git a/kernel/kfifo.c b/kernel/kfifo.c
deleted file mode 100644
index e92d519f93b..00000000000
--- a/kernel/kfifo.c
+++ /dev/null
@@ -1,400 +0,0 @@
-/*
- * A generic kernel FIFO implementation.
- *
- * Copyright (C) 2009 Stefani Seibold <stefani@seibold.net>
- * Copyright (C) 2004 Stelian Pop <stelian@popies.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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 the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/kfifo.h>
-#include <linux/log2.h>
-#include <linux/uaccess.h>
-
-static void _kfifo_init(struct kfifo *fifo, unsigned char *buffer,
-		unsigned int size)
-{
-	fifo->buffer = buffer;
-	fifo->size = size;
-
-	kfifo_reset(fifo);
-}
-
-/**
- * kfifo_init - initialize a FIFO using a preallocated buffer
- * @fifo: the fifo to assign the buffer
- * @buffer: the preallocated buffer to be used.
- * @size: the size of the internal buffer, this have to be a power of 2.
- *
- */
-void kfifo_init(struct kfifo *fifo, unsigned char *buffer, unsigned int size)
-{
-	/* size must be a power of 2 */
-	BUG_ON(!is_power_of_2(size));
-
-	_kfifo_init(fifo, buffer, size);
-}
-EXPORT_SYMBOL(kfifo_init);
-
-/**
- * kfifo_alloc - allocates a new FIFO internal buffer
- * @fifo: the fifo to assign then new buffer
- * @size: the size of the buffer to be allocated, this have to be a power of 2.
- * @gfp_mask: get_free_pages mask, passed to kmalloc()
- *
- * This function dynamically allocates a new fifo internal buffer
- *
- * The size will be rounded-up to a power of 2.
- * The buffer will be release with kfifo_free().
- * Return 0 if no error, otherwise the an error code
- */
-int kfifo_alloc(struct kfifo *fifo, unsigned int size, gfp_t gfp_mask)
-{
-	unsigned char *buffer;
-
-	/*
-	 * round up to the next power of 2, since our 'let the indices
-	 * wrap' technique works only in this case.
-	 */
-	if (!is_power_of_2(size)) {
-		BUG_ON(size > 0x80000000);
-		size = roundup_pow_of_two(size);
-	}
-
-	buffer = kmalloc(size, gfp_mask);
-	if (!buffer) {
-		_kfifo_init(fifo, 0, 0);
-		return -ENOMEM;
-	}
-
-	_kfifo_init(fifo, buffer, size);
-
-	return 0;
-}
-EXPORT_SYMBOL(kfifo_alloc);
-
-/**
- * kfifo_free - frees the FIFO internal buffer
- * @fifo: the fifo to be freed.
- */
-void kfifo_free(struct kfifo *fifo)
-{
-	kfree(fifo->buffer);
-}
-EXPORT_SYMBOL(kfifo_free);
-
-/**
- * kfifo_skip - skip output data
- * @fifo: the fifo to be used.
- * @len: number of bytes to skip
- */
-void kfifo_skip(struct kfifo *fifo, unsigned int len)
-{
-	if (len < kfifo_len(fifo)) {
-		__kfifo_add_out(fifo, len);
-		return;
-	}
-	kfifo_reset_out(fifo);
-}
-EXPORT_SYMBOL(kfifo_skip);
-
-static inline void __kfifo_in_data(struct kfifo *fifo,
-		const void *from, unsigned int len, unsigned int off)
-{
-	unsigned int l;
-
-	/*
-	 * Ensure that we sample the fifo->out index -before- we
-	 * start putting bytes into the kfifo.
-	 */
-
-	smp_mb();
-
-	off = __kfifo_off(fifo, fifo->in + off);
-
-	/* first put the data starting from fifo->in to buffer end */
-	l = min(len, fifo->size - off);
-	memcpy(fifo->buffer + off, from, l);
-
-	/* then put the rest (if any) at the beginning of the buffer */
-	memcpy(fifo->buffer, from + l, len - l);
-}
-
-static inline void __kfifo_out_data(struct kfifo *fifo,
-		void *to, unsigned int len, unsigned int off)
-{
-	unsigned int l;
-
-	/*
-	 * Ensure that we sample the fifo->in index -before- we
-	 * start removing bytes from the kfifo.
-	 */
-
-	smp_rmb();
-
-	off = __kfifo_off(fifo, fifo->out + off);
-
-	/* first get the data from fifo->out until the end of the buffer */
-	l = min(len, fifo->size - off);
-	memcpy(to, fifo->buffer + off, l);
-
-	/* then get the rest (if any) from the beginning of the buffer */
-	memcpy(to + l, fifo->buffer, len - l);
-}
-
-static inline unsigned int __kfifo_from_user_data(struct kfifo *fifo,
-	 const void __user *from, unsigned int len, unsigned int off)
-{
-	unsigned int l;
-	int ret;
-
-	/*
-	 * Ensure that we sample the fifo->out index -before- we
-	 * start putting bytes into the kfifo.
-	 */
-
-	smp_mb();
-
-	off = __kfifo_off(fifo, fifo->in + off);
-
-	/* first put the data starting from fifo->in to buffer end */
-	l = min(len, fifo->size - off);
-	ret = copy_from_user(fifo->buffer + off, from, l);
-
-	if (unlikely(ret))
-		return ret + len - l;
-
-	/* then put the rest (if any) at the beginning of the buffer */
-	return copy_from_user(fifo->buffer, from + l, len - l);
-}
-
-static inline unsigned int __kfifo_to_user_data(struct kfifo *fifo,
-		void __user *to, unsigned int len, unsigned int off)
-{
-	unsigned int l;
-	int ret;
-
-	/*
-	 * Ensure that we sample the fifo->in index -before- we
-	 * start removing bytes from the kfifo.
-	 */
-
-	smp_rmb();
-
-	off = __kfifo_off(fifo, fifo->out + off);
-
-	/* first get the data from fifo->out until the end of the buffer */
-	l = min(len, fifo->size - off);
-	ret = copy_to_user(to, fifo->buffer + off, l);
-
-	if (unlikely(ret))
-		return ret + len - l;
-
-	/* then get the rest (if any) from the beginning of the buffer */
-	return copy_to_user(to + l, fifo->buffer, len - l);
-}
-
-unsigned int __kfifo_in_n(struct kfifo *fifo,
-	const void *from, unsigned int len, unsigned int recsize)
-{
-	if (kfifo_avail(fifo) < len + recsize)
-		return len + 1;
-
-	__kfifo_in_data(fifo, from, len, recsize);
-	return 0;
-}
-EXPORT_SYMBOL(__kfifo_in_n);
-
-/**
- * kfifo_in - puts some data into the FIFO
- * @fifo: the fifo to be used.
- * @from: the data to be added.
- * @len: the length of the data to be added.
- *
- * This function copies at most @len bytes from the @from buffer into
- * the FIFO depending on the free space, and returns the number of
- * bytes copied.
- *
- * Note that with only one concurrent reader and one concurrent
- * writer, you don't need extra locking to use these functions.
- */
-unsigned int kfifo_in(struct kfifo *fifo, const unsigned char *from,
-				unsigned int len)
-{
-	len = min(kfifo_avail(fifo), len);
-
-	__kfifo_in_data(fifo, from, len, 0);
-	__kfifo_add_in(fifo, len);
-	return len;
-}
-EXPORT_SYMBOL(kfifo_in);
-
-unsigned int __kfifo_in_generic(struct kfifo *fifo,
-	const void *from, unsigned int len, unsigned int recsize)
-{
-	return __kfifo_in_rec(fifo, from, len, recsize);
-}
-EXPORT_SYMBOL(__kfifo_in_generic);
-
-unsigned int __kfifo_out_n(struct kfifo *fifo,
-	void *to, unsigned int len, unsigned int recsize)
-{
-	if (kfifo_len(fifo) < len + recsize)
-		return len;
-
-	__kfifo_out_data(fifo, to, len, recsize);
-	__kfifo_add_out(fifo, len + recsize);
-	return 0;
-}
-EXPORT_SYMBOL(__kfifo_out_n);
-
-/**
- * kfifo_out - gets some data from the FIFO
- * @fifo: the fifo to be used.
- * @to: where the data must be copied.
- * @len: the size of the destination buffer.
- *
- * This function copies at most @len bytes from the FIFO into the
- * @to buffer and returns the number of copied bytes.
- *
- * Note that with only one concurrent reader and one concurrent
- * writer, you don't need extra locking to use these functions.
- */
-unsigned int kfifo_out(struct kfifo *fifo, unsigned char *to, unsigned int len)
-{
-	len = min(kfifo_len(fifo), len);
-
-	__kfifo_out_data(fifo, to, len, 0);
-	__kfifo_add_out(fifo, len);
-
-	return len;
-}
-EXPORT_SYMBOL(kfifo_out);
-
-unsigned int __kfifo_out_generic(struct kfifo *fifo,
-	void *to, unsigned int len, unsigned int recsize,
-	unsigned int *total)
-{
-	return __kfifo_out_rec(fifo, to, len, recsize, total);
-}
-EXPORT_SYMBOL(__kfifo_out_generic);
-
-unsigned int __kfifo_from_user_n(struct kfifo *fifo,
-	const void __user *from, unsigned int len, unsigned int recsize)
-{
-	if (kfifo_avail(fifo) < len + recsize)
-		return len + 1;
-
-	return __kfifo_from_user_data(fifo, from, len, recsize);
-}
-EXPORT_SYMBOL(__kfifo_from_user_n);
-
-/**
- * kfifo_from_user - puts some data from user space into the FIFO
- * @fifo: the fifo to be used.
- * @from: pointer to the data to be added.
- * @len: the length of the data to be added.
- *
- * This function copies at most @len bytes from the @from into the
- * FIFO depending and returns the number of copied bytes.
- *
- * Note that with only one concurrent reader and one concurrent
- * writer, you don't need extra locking to use these functions.
- */
-unsigned int kfifo_from_user(struct kfifo *fifo,
-	const void __user *from, unsigned int len)
-{
-	len = min(kfifo_avail(fifo), len);
-	len -= __kfifo_from_user_data(fifo, from, len, 0);
-	__kfifo_add_in(fifo, len);
-	return len;
-}
-EXPORT_SYMBOL(kfifo_from_user);
-
-unsigned int __kfifo_from_user_generic(struct kfifo *fifo,
-	const void __user *from, unsigned int len, unsigned int recsize)
-{
-	return __kfifo_from_user_rec(fifo, from, len, recsize);
-}
-EXPORT_SYMBOL(__kfifo_from_user_generic);
-
-unsigned int __kfifo_to_user_n(struct kfifo *fifo,
-	void __user *to, unsigned int len, unsigned int reclen,
-	unsigned int recsize)
-{
-	unsigned int ret;
-
-	if (kfifo_len(fifo) < reclen + recsize)
-		return len;
-
-	ret = __kfifo_to_user_data(fifo, to, reclen, recsize);
-
-	if (likely(ret == 0))
-		__kfifo_add_out(fifo, reclen + recsize);
-
-	return ret;
-}
-EXPORT_SYMBOL(__kfifo_to_user_n);
-
-/**
- * kfifo_to_user - gets data from the FIFO and write it to user space
- * @fifo: the fifo to be used.
- * @to: where the data must be copied.
- * @len: the size of the destination buffer.
- *
- * This function copies at most @len bytes from the FIFO into the
- * @to buffer and returns the number of copied bytes.
- *
- * Note that with only one concurrent reader and one concurrent
- * writer, you don't need extra locking to use these functions.
- */
-unsigned int kfifo_to_user(struct kfifo *fifo,
-	void __user *to, unsigned int len)
-{
-	len = min(kfifo_len(fifo), len);
-	len -= __kfifo_to_user_data(fifo, to, len, 0);
-	__kfifo_add_out(fifo, len);
-	return len;
-}
-EXPORT_SYMBOL(kfifo_to_user);
-
-unsigned int __kfifo_to_user_generic(struct kfifo *fifo,
-	void __user *to, unsigned int len, unsigned int recsize,
-	unsigned int *total)
-{
-	return __kfifo_to_user_rec(fifo, to, len, recsize, total);
-}
-EXPORT_SYMBOL(__kfifo_to_user_generic);
-
-unsigned int __kfifo_peek_generic(struct kfifo *fifo, unsigned int recsize)
-{
-	if (recsize == 0)
-		return kfifo_avail(fifo);
-
-	return __kfifo_peek_n(fifo, recsize);
-}
-EXPORT_SYMBOL(__kfifo_peek_generic);
-
-void __kfifo_skip_generic(struct kfifo *fifo, unsigned int recsize)
-{
-	__kfifo_skip_rec(fifo, recsize);
-}
-EXPORT_SYMBOL(__kfifo_skip_generic);
-