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Revision 64165b1affc5bc16231ac971e66aae7d68d57f2c authored by Hugh Dickins on 19 April 2019, 00:50:09 UTC, committed by Linus Torvalds on 19 April 2019, 16:46:04 UTC 
mm: swapoff: take notice of completion sooner
 
The old try_to_unuse() implementation was driven by find_next_to_unuse(),
which terminated as soon as all the swap had been freed.

Add inuse_pages checks now (alongside signal_pending()) to stop scanning
mms and swap_map once finished.

The same ought to be done in shmem_unuse() too, but never was before,
and needs a different interface: so leave it as is for now.

Link: http://lkml.kernel.org/r/alpine.LSU.2.11.1904081258200.1523@eggly.anvils
Fixes: b56a2d8af914 ("mm: rid swapoff of quadratic complexity")
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Kelley Nielsen <kelleynnn@gmail.com>
Cc: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Rik van Riel <riel@surriel.com>
Cc: Vineeth Pillai <vpillai@digitalocean.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Raw File
hid-nti.c 
/*
 *  USB HID quirks support for Network Technologies, Inc. "USB-SUN" USB
 *  adapter for pre-USB Sun keyboards
 *
 *  Copyright (c) 2011 Google, Inc.
 *
 * Based on HID apple driver by
 *  Copyright (c) 1999 Andreas Gal
 *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
 *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
 *  Copyright (c) 2006-2007 Jiri Kosina
 *  Copyright (c) 2008 Jiri Slaby <jirislaby@gmail.com>
 */

/*
 * 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.
 */

#include <linux/device.h>
#include <linux/input.h>
#include <linux/hid.h>
#include <linux/module.h>

#include "hid-ids.h"

MODULE_AUTHOR("Jonathan Klabunde Tomer <jktomer@google.com>");
MODULE_DESCRIPTION("HID driver for Network Technologies USB-SUN keyboard adapter");

/*
 * NTI Sun keyboard adapter has wrong logical maximum in report descriptor
 */
static __u8 *nti_usbsun_report_fixup(struct hid_device *hdev, __u8 *rdesc,
		unsigned int *rsize)
{
	if (*rsize >= 60 && rdesc[53] == 0x65 && rdesc[59] == 0x65) {
		hid_info(hdev, "fixing up NTI USB-SUN keyboard adapter report descriptor\n");
		rdesc[53] = rdesc[59] = 0xe7;
	}
	return rdesc;
}

static const struct hid_device_id nti_devices[] = {
	{ HID_USB_DEVICE(USB_VENDOR_ID_NTI, USB_DEVICE_ID_USB_SUN) },
	{ }
};
MODULE_DEVICE_TABLE(hid, nti_devices);

static struct hid_driver nti_driver = {
	.name = "nti",
	.id_table = nti_devices,
	.report_fixup = nti_usbsun_report_fixup
};

module_hid_driver(nti_driver);

MODULE_LICENSE("GPL");
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