Revision a0195f314a25582b38993bf30db11c300f4f4611 authored by Fenghua Yu on 17 December 2020, 22:31:19 UTC, committed by Borislav Petkov on 08 January 2021, 08:08:03 UTC
Shakeel Butt reported in [1] that a user can request a task to be moved
to a resource group even if the task is already in the group. It just
wastes time to do the move operation which could be costly to send IPI
to a different CPU.
Add a sanity check to ensure that the move operation only happens when
the task is not already in the resource group.
[1] https://lore.kernel.org/lkml/CALvZod7E9zzHwenzf7objzGKsdBmVwTgEJ0nPgs0LUFU3SN5Pw@mail.gmail.com/
Fixes: e02737d5b826 ("x86/intel_rdt: Add tasks files")
Reported-by: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/962ede65d8e95be793cb61102cca37f7bb018e66.1608243147.git.reinette.chatre@intel.com
1 parent ae28d1a
emu10k1_synth.h
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef __EMU10K1_SYNTH_H
#define __EMU10K1_SYNTH_H
/*
* Defines for the Emu10k1 WaveTable synth
*
* Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
*/
#include <sound/emu10k1.h>
#include <sound/emux_synth.h>
/* sequencer device id */
#define SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH "emu10k1-synth"
/* argument for snd_seq_device_new */
struct snd_emu10k1_synth_arg {
struct snd_emu10k1 *hwptr; /* chip */
int index; /* sequencer client index */
int seq_ports; /* number of sequencer ports to be created */
int max_voices; /* maximum number of voices for wavetable */
};
#define EMU10K1_MAX_MEMSIZE (32 * 1024 * 1024) /* 32MB */
#endif
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