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Linus Torvalds
bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* uvc_debugfs.c -- USB Video Class driver - Debugging support
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*
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* Copyright (C) 2011
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* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*/
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#include <linux/module.h>
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include "uvcvideo.h"
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/* -----------------------------------------------------------------------------
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* Statistics
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*/
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#define UVC_DEBUGFS_BUF_SIZE 1024
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struct uvc_debugfs_buffer {
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size_t count;
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char data[UVC_DEBUGFS_BUF_SIZE];
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};
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static int uvc_debugfs_stats_open(struct inode *inode, struct file *file)
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{
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struct uvc_streaming *stream = inode->i_private;
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struct uvc_debugfs_buffer *buf;
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buf = kmalloc_obj(*buf);
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if (buf == NULL)
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return -ENOMEM;
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buf->count = uvc_video_stats_dump(stream, buf->data, sizeof(buf->data));
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file->private_data = buf;
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return 0;
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}
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static ssize_t uvc_debugfs_stats_read(struct file *file, char __user *user_buf,
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size_t nbytes, loff_t *ppos)
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{
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struct uvc_debugfs_buffer *buf = file->private_data;
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return simple_read_from_buffer(user_buf, nbytes, ppos, buf->data,
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buf->count);
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}
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static int uvc_debugfs_stats_release(struct inode *inode, struct file *file)
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{
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kfree(file->private_data);
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file->private_data = NULL;
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return 0;
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}
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static const struct file_operations uvc_debugfs_stats_fops = {
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.owner = THIS_MODULE,
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.open = uvc_debugfs_stats_open,
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.read = uvc_debugfs_stats_read,
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.release = uvc_debugfs_stats_release,
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};
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/* -----------------------------------------------------------------------------
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* Global and stream initialization/cleanup
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*/
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static struct dentry *uvc_debugfs_root_dir;
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void uvc_debugfs_init_stream(struct uvc_streaming *stream)
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{
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struct usb_device *udev = stream->dev->udev;
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char dir_name[33];
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if (uvc_debugfs_root_dir == NULL)
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return;
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snprintf(dir_name, sizeof(dir_name), "%u-%u-%u", udev->bus->busnum,
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udev->devnum, stream->intfnum);
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stream->debugfs_dir = debugfs_create_dir(dir_name,
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uvc_debugfs_root_dir);
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debugfs_create_file("stats", 0444, stream->debugfs_dir, stream,
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&uvc_debugfs_stats_fops);
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}
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void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream)
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{
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debugfs_remove_recursive(stream->debugfs_dir);
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stream->debugfs_dir = NULL;
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}
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void uvc_debugfs_init(void)
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{
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uvc_debugfs_root_dir = debugfs_create_dir("uvcvideo", usb_debug_root);
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}
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void uvc_debugfs_cleanup(void)
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{
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debugfs_remove_recursive(uvc_debugfs_root_dir);
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}
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