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authorViresh Kumar <viresh.kumar@linaro.org>2021-01-14 17:05:30 +0530
committerViresh Kumar <viresh.kumar@linaro.org>2021-01-29 10:06:24 +0530
commitf8408264c77a0cebb20244d1f4750501b36abe0e (patch)
tree1e3f4b7a0d03f7a10b49e22a43b42561646c7887 /drivers/oprofile/oprofile_files.c
parenta848bf1d9ef14fa45b65f402d7d439626aad4877 (diff)
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>
Diffstat (limited to 'drivers/oprofile/oprofile_files.c')
-rw-r--r--drivers/oprofile/oprofile_files.c201
1 files changed, 0 insertions, 201 deletions
diff --git a/drivers/oprofile/oprofile_files.c b/drivers/oprofile/oprofile_files.c
deleted file mode 100644
index ee2cfce358b9..000000000000
--- a/drivers/oprofile/oprofile_files.c
+++ /dev/null
@@ -1,201 +0,0 @@
-/**
- * @file oprofile_files.c
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon <levon@movementarian.org>
- */
-
-#include <linux/fs.h>
-#include <linux/oprofile.h>
-#include <linux/jiffies.h>
-
-#include "event_buffer.h"
-#include "oprofile_stats.h"
-#include "oprof.h"
-
-#define BUFFER_SIZE_DEFAULT 131072
-#define CPU_BUFFER_SIZE_DEFAULT 8192
-#define BUFFER_WATERSHED_DEFAULT 32768 /* FIXME: tune */
-#define TIME_SLICE_DEFAULT 1
-
-unsigned long oprofile_buffer_size;
-unsigned long oprofile_cpu_buffer_size;
-unsigned long oprofile_buffer_watershed;
-unsigned long oprofile_time_slice;
-
-#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
-
-static ssize_t timeout_read(struct file *file, char __user *buf,
- size_t count, loff_t *offset)
-{
- return oprofilefs_ulong_to_user(jiffies_to_msecs(oprofile_time_slice),
- buf, count, offset);
-}
-
-
-static ssize_t timeout_write(struct file *file, char const __user *buf,
- size_t count, loff_t *offset)
-{
- unsigned long val;
- int retval;
-
- if (*offset)
- return -EINVAL;
-
- retval = oprofilefs_ulong_from_user(&val, buf, count);
- if (retval <= 0)
- return retval;
-
- retval = oprofile_set_timeout(val);
-
- if (retval)
- return retval;
- return count;
-}
-
-
-static const struct file_operations timeout_fops = {
- .read = timeout_read,
- .write = timeout_write,
- .llseek = default_llseek,
-};
-
-#endif
-
-
-static ssize_t depth_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
- return oprofilefs_ulong_to_user(oprofile_backtrace_depth, buf, count,
- offset);
-}
-
-
-static ssize_t depth_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
-{
- unsigned long val;
- int retval;
-
- if (*offset)
- return -EINVAL;
-
- if (!oprofile_ops.backtrace)
- return -EINVAL;
-
- retval = oprofilefs_ulong_from_user(&val, buf, count);
- if (retval <= 0)
- return retval;
-
- retval = oprofile_set_ulong(&oprofile_backtrace_depth, val);
- if (retval)
- return retval;
-
- return count;
-}
-
-
-static const struct file_operations depth_fops = {
- .read = depth_read,
- .write = depth_write,
- .llseek = default_llseek,
-};
-
-
-static ssize_t pointer_size_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
- return oprofilefs_ulong_to_user(sizeof(void *), buf, count, offset);
-}
-
-
-static const struct file_operations pointer_size_fops = {
- .read = pointer_size_read,
- .llseek = default_llseek,
-};
-
-
-static ssize_t cpu_type_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
- return oprofilefs_str_to_user(oprofile_ops.cpu_type, buf, count, offset);
-}
-
-
-static const struct file_operations cpu_type_fops = {
- .read = cpu_type_read,
- .llseek = default_llseek,
-};
-
-
-static ssize_t enable_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
-{
- return oprofilefs_ulong_to_user(oprofile_started, buf, count, offset);
-}
-
-
-static ssize_t enable_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
-{
- unsigned long val;
- int retval;
-
- if (*offset)
- return -EINVAL;
-
- retval = oprofilefs_ulong_from_user(&val, buf, count);
- if (retval <= 0)
- return retval;
-
- retval = 0;
- if (val)
- retval = oprofile_start();
- else
- oprofile_stop();
-
- if (retval)
- return retval;
- return count;
-}
-
-
-static const struct file_operations enable_fops = {
- .read = enable_read,
- .write = enable_write,
- .llseek = default_llseek,
-};
-
-
-static ssize_t dump_write(struct file *file, char const __user *buf, size_t count, loff_t *offset)
-{
- wake_up_buffer_waiter();
- return count;
-}
-
-
-static const struct file_operations dump_fops = {
- .write = dump_write,
- .llseek = noop_llseek,
-};
-
-void oprofile_create_files(struct dentry *root)
-{
- /* reinitialize default values */
- oprofile_buffer_size = BUFFER_SIZE_DEFAULT;
- oprofile_cpu_buffer_size = CPU_BUFFER_SIZE_DEFAULT;
- oprofile_buffer_watershed = BUFFER_WATERSHED_DEFAULT;
- oprofile_time_slice = msecs_to_jiffies(TIME_SLICE_DEFAULT);
-
- oprofilefs_create_file(root, "enable", &enable_fops);
- oprofilefs_create_file_perm(root, "dump", &dump_fops, 0666);
- oprofilefs_create_file(root, "buffer", &event_buffer_fops);
- oprofilefs_create_ulong(root, "buffer_size", &oprofile_buffer_size);
- oprofilefs_create_ulong(root, "buffer_watershed", &oprofile_buffer_watershed);
- oprofilefs_create_ulong(root, "cpu_buffer_size", &oprofile_cpu_buffer_size);
- oprofilefs_create_file(root, "cpu_type", &cpu_type_fops);
- oprofilefs_create_file(root, "backtrace_depth", &depth_fops);
- oprofilefs_create_file(root, "pointer_size", &pointer_size_fops);
-#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
- oprofilefs_create_file(root, "time_slice", &timeout_fops);
-#endif
- oprofile_create_stats_files(root);
- if (oprofile_ops.create_files)
- oprofile_ops.create_files(root);
-}