1 files changed, 0 insertions, 197 deletions
diff --git a/kernel/kfifo.c b/kernel/kfifo.c
deleted file mode 100644
index bc41ad0f24f..00000000000
--- a/kernel/kfifo.c
+++ /dev/null
@@ -1,197 +0,0 @@
-/*
- * A simple kernel FIFO implementation.
- *
- * 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>
-
-/**
- * kfifo_init - allocates a new FIFO using a preallocated buffer
- * @buffer: the preallocated buffer to be used.
- * @size: the size of the internal buffer, this have to be a power of 2.
- * @gfp_mask: get_free_pages mask, passed to kmalloc()
- * @lock: the lock to be used to protect the fifo buffer
- *
- * Do NOT pass the kfifo to kfifo_free() after use! Simply free the
- * &struct kfifo with kfree().
- */
-struct kfifo *kfifo_init(unsigned char *buffer, unsigned int size,
-			 gfp_t gfp_mask, spinlock_t *lock)
-{
-	struct kfifo *fifo;
-
-	/* size must be a power of 2 */
-	BUG_ON(!is_power_of_2(size));
-
-	fifo = kmalloc(sizeof(struct kfifo), gfp_mask);
-	if (!fifo)
-		return ERR_PTR(-ENOMEM);
-
-	fifo->buffer = buffer;
-	fifo->size = size;
-	fifo->in = fifo->out = 0;
-	fifo->lock = lock;
-
-	return fifo;
-}
-EXPORT_SYMBOL(kfifo_init);
-
-/**
- * kfifo_alloc - allocates a new FIFO and its internal buffer
- * @size: the size of the internal buffer to be allocated.
- * @gfp_mask: get_free_pages mask, passed to kmalloc()
- * @lock: the lock to be used to protect the fifo buffer
- *
- * The size will be rounded-up to a power of 2.
- */
-struct kfifo *kfifo_alloc(unsigned int size, gfp_t gfp_mask, spinlock_t *lock)
-{
-	unsigned char *buffer;
-	struct kfifo *ret;
-
-	/*
-	 * round up to the next power of 2, since our 'let the indices
-	 * wrap' tachnique works only in this case.
-	 */
-	if (size & (size - 1)) {
-		BUG_ON(size > 0x80000000);
-		size = roundup_pow_of_two(size);
-	}
-
-	buffer = kmalloc(size, gfp_mask);
-	if (!buffer)
-		return ERR_PTR(-ENOMEM);
-
-	ret = kfifo_init(buffer, size, gfp_mask, lock);
-
-	if (IS_ERR(ret))
-		kfree(buffer);
-
-	return ret;
-}
-EXPORT_SYMBOL(kfifo_alloc);
-
-/**
- * kfifo_free - frees the FIFO
- * @fifo: the fifo to be freed.
- */
-void kfifo_free(struct kfifo *fifo)
-{
-	kfree(fifo->buffer);
-	kfree(fifo);
-}
-EXPORT_SYMBOL(kfifo_free);
-
-/**
- * __kfifo_put - puts some data into the FIFO, no locking version
- * @fifo: the fifo to be used.
- * @buffer: the data to be added.
- * @len: the length of the data to be added.
- *
- * This function copies at most @len bytes from the @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_put(struct kfifo *fifo,
-			 unsigned char *buffer, unsigned int len)
-{
-	unsigned int l;
-
-	len = min(len, fifo->size - fifo->in + fifo->out);
-
-	/*
-	 * Ensure that we sample the fifo->out index -before- we
-	 * start putting bytes into the kfifo.
-	 */
-
-	smp_mb();
-
-	/* first put the data starting from fifo->in to buffer end */
-	l = min(len, fifo->size - (fifo->in & (fifo->size - 1)));
-	memcpy(fifo->buffer + (fifo->in & (fifo->size - 1)), buffer, l);
-
-	/* then put the rest (if any) at the beginning of the buffer */
-	memcpy(fifo->buffer, buffer + l, len - l);
-
-	/*
-	 * Ensure that we add the bytes to the kfifo -before-
-	 * we update the fifo->in index.
-	 */
-
-	smp_wmb();
-
-	fifo->in += len;
-
-	return len;
-}
-EXPORT_SYMBOL(__kfifo_put);
-
-/**
- * __kfifo_get - gets some data from the FIFO, no locking version
- * @fifo: the fifo to be used.
- * @buffer: 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
- * @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_get(struct kfifo *fifo,
-			 unsigned char *buffer, unsigned int len)
-{
-	unsigned int l;
-
-	len = min(len, fifo->in - fifo->out);
-
-	/*
-	 * Ensure that we sample the fifo->in index -before- we
-	 * start removing bytes from the kfifo.
-	 */
-
-	smp_rmb();
-
-	/* first get the data from fifo->out until the end of the buffer */
-	l = min(len, fifo->size - (fifo->out & (fifo->size - 1)));
-	memcpy(buffer, fifo->buffer + (fifo->out & (fifo->size - 1)), l);
-
-	/* then get the rest (if any) from the beginning of the buffer */
-	memcpy(buffer + l, fifo->buffer, len - l);
-
-	/*
-	 * Ensure that we remove the bytes from the kfifo -before-
-	 * we update the fifo->out index.
-	 */
-
-	smp_mb();
-
-	fifo->out += len;
-
-	return len;
-}
-EXPORT_SYMBOL(__kfifo_get);