fscache, cachefiles: Remove the histogram stuff

Remove the histogram stuff as it's mostly going to be outdated.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
cc: linux-cachefs@redhat.com
Link: https://lore.kernel.org/r/162431195953.2908479.16770977195634296638.stgit@warthog.procyon.org.uk/

1 files changed, 0 insertions, 114 deletions

diff --git a/fs/cachefiles/proc.c b/fs/cachefiles/proc.c
deleted file mode 100644
index 6e67aea0f24e..000000000000
--- a/fs/cachefiles/proc.c
+++ /dev/null
@@ -1,114 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/* CacheFiles statistics
- *
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- */
-
-#include <linux/module.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include "internal.h"
-
-atomic_t cachefiles_lookup_histogram[HZ];
-atomic_t cachefiles_mkdir_histogram[HZ];
-atomic_t cachefiles_create_histogram[HZ];
-
-/*
- * display the latency histogram
- */
-static int cachefiles_histogram_show(struct seq_file *m, void *v)
-{
-	unsigned long index;
-	unsigned x, y, z, t;
-
-	switch ((unsigned long) v) {
-	case 1:
-		seq_puts(m, "JIFS  SECS  LOOKUPS   MKDIRS    CREATES\n");
-		return 0;
-	case 2:
-		seq_puts(m, "===== ===== ========= ========= =========\n");
-		return 0;
-	default:
-		index = (unsigned long) v - 3;
-		x = atomic_read(&cachefiles_lookup_histogram[index]);
-		y = atomic_read(&cachefiles_mkdir_histogram[index]);
-		z = atomic_read(&cachefiles_create_histogram[index]);
-		if (x == 0 && y == 0 && z == 0)
-			return 0;
-
-		t = (index * 1000) / HZ;
-
-		seq_printf(m, "%4lu  0.%03u %9u %9u %9u\n", index, t, x, y, z);
-		return 0;
-	}
-}
-
-/*
- * set up the iterator to start reading from the first line
- */
-static void *cachefiles_histogram_start(struct seq_file *m, loff_t *_pos)
-{
-	if ((unsigned long long)*_pos >= HZ + 2)
-		return NULL;
-	if (*_pos == 0)
-		*_pos = 1;
-	return (void *)(unsigned long) *_pos;
-}
-
-/*
- * move to the next line
- */
-static void *cachefiles_histogram_next(struct seq_file *m, void *v, loff_t *pos)
-{
-	(*pos)++;
-	return (unsigned long long)*pos > HZ + 2 ?
-		NULL : (void *)(unsigned long) *pos;
-}
-
-/*
- * clean up after reading
- */
-static void cachefiles_histogram_stop(struct seq_file *m, void *v)
-{
-}
-
-static const struct seq_operations cachefiles_histogram_ops = {
-	.start		= cachefiles_histogram_start,
-	.stop		= cachefiles_histogram_stop,
-	.next		= cachefiles_histogram_next,
-	.show		= cachefiles_histogram_show,
-};
-
-/*
- * initialise the /proc/fs/cachefiles/ directory
- */
-int __init cachefiles_proc_init(void)
-{
-	_enter("");
-
-	if (!proc_mkdir("fs/cachefiles", NULL))
-		goto error_dir;
-
-	if (!proc_create_seq("fs/cachefiles/histogram", S_IFREG | 0444, NULL,
-			 &cachefiles_histogram_ops))
-		goto error_histogram;
-
-	_leave(" = 0");
-	return 0;
-
-error_histogram:
-	remove_proc_entry("fs/cachefiles", NULL);
-error_dir:
-	_leave(" = -ENOMEM");
-	return -ENOMEM;
-}
-
-/*
- * clean up the /proc/fs/cachefiles/ directory
- */
-void cachefiles_proc_cleanup(void)
-{
-	remove_proc_entry("fs/cachefiles/histogram", NULL);
-	remove_proc_entry("fs/cachefiles", NULL);
-}