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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>
70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* The USB Monitor, inspired by Dave Harding's USBMon.
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*
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* This is the 's' or 'stat' reader which debugs usbmon itself.
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* Note that this code blows through locks, so make sure that
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* /dbg/usbmon/0s is well protected from non-root users.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/export.h>
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#include <linux/usb.h>
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#include <linux/fs.h>
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#include <linux/uaccess.h>
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#include "usb_mon.h"
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#define STAT_BUF_SIZE 80
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struct snap {
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int slen;
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char str[STAT_BUF_SIZE];
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};
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static int mon_stat_open(struct inode *inode, struct file *file)
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{
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struct mon_bus *mbus;
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struct snap *sp;
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sp = kmalloc_obj(struct snap);
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if (sp == NULL)
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return -ENOMEM;
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mbus = inode->i_private;
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sp->slen = scnprintf(sp->str, STAT_BUF_SIZE,
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"nreaders %d events %u text_lost %u\n",
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mbus->nreaders, mbus->cnt_events, mbus->cnt_text_lost);
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file->private_data = sp;
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return 0;
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}
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static ssize_t mon_stat_read(struct file *file, char __user *buf,
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size_t nbytes, loff_t *ppos)
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{
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struct snap *sp = file->private_data;
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return simple_read_from_buffer(buf, nbytes, ppos, sp->str, sp->slen);
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}
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static int mon_stat_release(struct inode *inode, struct file *file)
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{
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struct snap *sp = file->private_data;
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file->private_data = NULL;
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kfree(sp);
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return 0;
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}
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const struct file_operations mon_fops_stat = {
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.owner = THIS_MODULE,
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.open = mon_stat_open,
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.read = mon_stat_read,
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/* .write = mon_stat_write, */
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/* .poll = mon_stat_poll, */
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/* .unlocked_ioctl = mon_stat_ioctl, */
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.release = mon_stat_release,
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};
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