litmus-rt.git - The LITMUS^RT kernel.

diff options

author	KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>	2014-02-06 15:04:28 -0500
committer	Linus Torvalds <torvalds@linux-foundation.org>	2014-02-06 16:48:51 -0500
commit	227d53b397a32a7614667b3ecaf1d89902fb6c12 (patch)
tree	cfdccad47eb1404da7a657cd260af3ba1b3c3120 /kernel/panic.c
parent	7bc35fdde6724549a0239b71e08b9f33d8bf2bfb (diff)

mm: __set_page_dirty uses spin_lock_irqsave instead of spin_lock_irq

To use spin_{un}lock_irq is dangerous if caller disabled interrupt. During aio buffer migration, we have a possibility to see the following call stack. aio_migratepage [disable interrupt] migrate_page_copy clear_page_dirty_for_io set_page_dirty __set_page_dirty_buffers __set_page_dirty spin_lock_irq This mean, current aio migration is a deadlockable. spin_lock_irqsave is a safer alternative and we should use it. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Reported-by: David Rientjes rientjes@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Diffstat (limited to 'kernel/panic.c')

0 files changed, 0 insertions, 0 deletions

/* * ALSA driver for Echoaudio soundcards. * Copyright (C) 2003-2004 Giuliano Pochini <pochini@shiny.it> * * 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; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #define ECHO24_FAMILY #define ECHOCARD_MONA #define ECHOCARD_NAME "Mona" #define ECHOCARD_HAS_MONITOR #define ECHOCARD_HAS_ASIC #define ECHOCARD_HAS_SUPER_INTERLEAVE #define ECHOCARD_HAS_DIGITAL_IO #define ECHOCARD_HAS_DIGITAL_IN_AUTOMUTE #define ECHOCARD_HAS_DIGITAL_MODE_SWITCH #define ECHOCARD_HAS_EXTERNAL_CLOCK #define ECHOCARD_HAS_ADAT 6 #define ECHOCARD_HAS_STEREO_BIG_ENDIAN32 /* Pipe indexes */ #define PX_ANALOG_OUT 0 /* 6 */ #define PX_DIGITAL_OUT 6 /* 8 */ #define PX_ANALOG_IN 14 /* 4 */ #define PX_DIGITAL_IN 18 /* 8 */ #define PX_NUM 26 /* Bus indexes */ #define BX_ANALOG_OUT 0 /* 6 */ #define BX_DIGITAL_OUT 6 /* 8 */ #define BX_ANALOG_IN 14 /* 4 */ #define BX_DIGITAL_IN 18 /* 8 */ #define BX_NUM 26 #include <linux/delay.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/pci.h> #include <linux/module.h> #include <linux/firmware.h> #include <linux/slab.h> #include <sound/core.h> #include <sound/info.h> #include <sound/control.h> #include <sound/tlv.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/asoundef.h> #include <sound/initval.h> #include <asm/io.h> #include <linux/atomic.h> #include "echoaudio.h" MODULE_FIRMWARE("ea/loader_dsp.fw"); MODULE_FIRMWARE("ea/mona_301_dsp.fw"); MODULE_FIRMWARE("ea/mona_361_dsp.fw"); MODULE_FIRMWARE("ea/mona_301_1_asic_48.fw"); MODULE_FIRMWARE("ea/mona_301_1_asic_96.fw"); MODULE_FIRMWARE("ea/mona_361_1_asic_48.fw"); MODULE_FIRMWARE("ea/mona_361_1_asic_96.fw"); MODULE_FIRMWARE("ea/mona_2_asic.fw"); #define FW_361_LOADER 0 #define FW_MONA_301_DSP 1 #define FW_MONA_361_DSP 2 #define FW_MONA_301_1_ASIC48 3 #define FW_MONA_301_1_ASIC96 4 #define FW_MONA_361_1_ASIC48 5 #define FW_MONA_361_1_ASIC96 6 #define FW_MONA_2_ASIC 7 static const struct firmware card_fw[] = { {0, "loader_dsp.fw"}, {0, "mona_301_dsp.fw"}, {0, "mona_361_dsp.fw"}, {0, "mona_301_1_asic_48.fw"}, {0, "mona_301_1_asic_96.fw"}, {0, "mona_361_1_asic_48.fw"}, {0, "mona_361_1_asic_96.fw"}, {0, "mona_2_asic.fw"} }; static DEFINE_PCI_DEVICE_TABLE(snd_echo_ids) = { {0x1057, 0x1801, 0xECC0, 0x0070, 0, 0, 0}, /* DSP 56301 Mona rev.0 */ {0x1057, 0x1801, 0xECC0, 0x0071, 0, 0, 0}, /* DSP 56301 Mona rev.1 */ {0x1057, 0x1801, 0xECC0, 0x0072, 0, 0, 0}, /* DSP 56301 Mona rev.2 */ {0x1057, 0x3410, 0xECC0, 0x0070, 0, 0, 0}, /* DSP 56361 Mona rev.0 */ {0x1057, 0x3410, 0xECC0, 0x0071, 0, 0, 0}, /* DSP 56361 Mona rev.1 */ {0x1057, 0x3410, 0xECC0, 0x0072, 0, 0, 0}, /* DSP 56361 Mona rev.2 */ {0,} }; static struct snd_pcm_hardware pcm_hardware_skel = { .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_SYNC_START, .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE, .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000, .rate_min = 8000, .rate_max = 96000, .channels_min = 1, .channels_max = 8, .buffer_bytes_max = 262144, .period_bytes_min = 32, .period_bytes_max = 131072, .periods_min = 2, .periods_max = 220, /* One page (4k) contains 512 instructions. I don't know if the hw supports lists longer than this. In this case periods_max=220 is a safe limit to make sure the list never exceeds 512 instructions. */ }; #include "mona_dsp.c" #include "echoaudio_dsp.c" #include "echoaudio_gml.c" #include "echoaudio.c"


context:
space:
mode: