Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 9 Sep 2002 06:01:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 9 Sep 2002 06:01:28 -0400 Received: from smtpout.mac.com ([204.179.120.89]:59603 "EHLO smtpout.mac.com") by vger.kernel.org with ESMTP id ; Mon, 9 Sep 2002 06:01:05 -0400 Message-Id: <200209091005.g89A5jKN016225@smtp-relay03.mac.com> Date: Thu, 29 Aug 2002 21:56:27 +0200 Mime-Version: 1.0 (Apple Message framework v482) Content-Type: text/plain; charset=US-ASCII; format=flowed Subject: [PATCH] 2/10 sound/oss/gus_wave.c From: pwaechtler@mac.com To: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 7bit Cc: torvalds@transmeta.com X-Mailer: Apple Mail (2.482) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 21029 Lines: 887 --- vanilla-2.5.33/sound/oss/gus_wave.c Sat Aug 10 00:04:14 2002 +++ linux-2.5-cli-oss/sound/oss/gus_wave.c Fri Aug 16 14:34:30 2002 @@ -19,6 +19,7 @@ #include #include +#include #define GUSPNP_AUTODETECT @@ -138,6 +139,7 @@ static unsigned long pcm_current_buf; static int pcm_current_count; static int pcm_current_intrflag; +static spinlock_t lock=SPIN_LOCK_UNLOCKED; extern int *gus_osp; @@ -226,8 +228,6 @@ { /* Writes a byte to the DRAM */ unsigned long flags; - save_flags(flags); - cli(); outb((0x43), u_Command); outb((addr & 0xff), u_DataLo); outb(((addr >> 8) & 0xff), u_DataHi); @@ -235,16 +235,12 @@ outb((0x44), u_Command); outb(((addr >> 16) & 0xff), u_DataHi); outb((data), u_DRAMIO); - restore_flags(flags); } static unsigned char gus_peek(long addr) { /* Reads a byte from the DRAM */ - unsigned long flags; unsigned char tmp; - save_flags(flags); - cli(); outb((0x43), u_Command); outb((addr & 0xff), u_DataLo); outb(((addr >> 8) & 0xff), u_DataHi); @@ -252,35 +248,23 @@ outb((0x44), u_Command); outb(((addr >> 16) & 0xff), u_DataHi); tmp = inb(u_DRAMIO); - restore_flags(flags); return tmp; } void gus_write8(int reg, unsigned int data) { /* Writes to an indirect register (8 bit) */ - unsigned long flags; - - save_flags(flags); - cli(); - outb((reg), u_Command); outb(((unsigned char) (data & 0xff)), u_DataHi); - - restore_flags(flags); } static unsigned char gus_read8(int reg) { /* Reads from an indirect register (8 bit). Offset 0x80. */ - unsigned long flags; unsigned char val; - save_flags(flags); - cli(); outb((reg | 0x80), u_Command); val = inb(u_DataHi); - restore_flags(flags); return val; } @@ -288,14 +272,10 @@ static unsigned char gus_look8(int reg) { /* Reads from an indirect register (8 bit). No additional offset. */ - unsigned long flags; unsigned char val; - save_flags(flags); - cli(); outb((reg), u_Command); val = inb(u_DataHi); - restore_flags(flags); return val; } @@ -303,54 +283,35 @@ static void gus_write16(int reg, unsigned int data) { /* Writes to an indirect register (16 bit) */ - unsigned long flags; - - save_flags(flags); - cli(); - outb((reg), u_Command); outb(((unsigned char) (data & 0xff)), u_DataLo); outb(((unsigned char) ((data >> 8) & 0xff)), u_DataHi); - - restore_flags(flags); } static unsigned short gus_read16(int reg) { /* Reads from an indirect register (16 bit). Offset 0x80. */ - unsigned long flags; unsigned char hi, lo; - save_flags(flags); - cli(); - outb((reg | 0x80), u_Command); lo = inb(u_DataLo); hi = inb(u_DataHi); - restore_flags(flags); - return ((hi << 8) & 0xff00) | lo; } static unsigned short gus_look16(int reg) { /* Reads from an indirect register (16 bit). No additional offset. */ - unsigned long flags; unsigned char hi, lo; - save_flags(flags); - cli(); - outb((reg), u_Command); lo = inb(u_DataLo); hi = inb(u_DataHi); - restore_flags(flags); - return ((hi << 8) & 0xff00) | lo; } @@ -358,10 +319,7 @@ { /* Writes an 24 bit memory address */ unsigned long hold_address; - unsigned long flags; - save_flags(flags); - cli(); if (is16bit) { if (iw_mode) @@ -389,7 +347,6 @@ gus_write16(reg, (unsigned short) ((address >> 7) & 0xffff)); gus_write16(reg + 1, (unsigned short) ((address << 9) & 0xffff) + (frac << 5)); - restore_flags(flags); } static void gus_select_voice(int voice) @@ -514,8 +471,7 @@ { unsigned long flags; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_voice_volume(0); gus_voice_off(); @@ -524,7 +480,7 @@ gus_write8(0x0d, 0x03); /* Ramping off */ voice_alloc->map[voice] = 0; voice_alloc->alloc_times[voice] = 0; - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } @@ -558,11 +514,10 @@ if (voices[voice].mode & WAVE_SUSTAIN_ON && voices[voice].env_phase == 2) { - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_rampoff(); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); return; /* * Sustain phase begins. Continue envelope after receiving note off. @@ -580,8 +535,7 @@ vol = voices[voice].initial_volume * voices[voice].env_offset[phase] / 255; rate = voices[voice].env_rate[phase]; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_voice_volume(prev_vol); @@ -593,7 +547,7 @@ if (((vol - prev_vol) / 64) == 0) /* No significant volume change */ { - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); step_envelope(voice); /* Continue the envelope on the next step */ return; } @@ -612,7 +566,7 @@ gus_rampon(0x60); /* Decreasing volume, with IRQ */ } voices[voice].current_volume = vol; - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } static void init_envelope(int voice) @@ -623,7 +577,7 @@ step_envelope(voice); } -static void start_release(int voice, long int flags) +static void start_release(int voice) { if (gus_read8(0x00) & 0x03) return; /* Voice already stopped */ @@ -635,7 +589,6 @@ voices[voice].mode &= ~WAVE_SUSTAIN_ON; gus_rampoff(); - restore_flags(flags); step_envelope(voice); } @@ -644,23 +597,22 @@ int instr_no = sample_map[voice], is16bits; long int flags; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); if (instr_no < 0 || instr_no > MAX_SAMPLE) { gus_write8(0x00, 0x03); /* Hard stop */ voice_alloc->map[voice] = 0; - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); return; } is16bits = (samples[instr_no].mode & WAVE_16_BITS) ? 1 : 0; /* 8 or 16 bits */ if (voices[voice].mode & WAVE_ENVELOPES) { - start_release(voice, flags); - restore_flags(flags); + start_release(voice); + spin_unlock_irqrestore(&lock, flags); return; } /* @@ -671,14 +623,14 @@ gus_voice_off(); gus_rampoff(); gus_voice_init(voice); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); return; } gus_ramp_range(65, 4030); gus_ramp_rate(2, 4); gus_rampon(0x40 | 0x20); /* Down, once, with IRQ */ voices[voice].volume_irq_mode = VMODE_HALT; - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } static void gus_reset(void) @@ -710,8 +662,7 @@ 0, 1, 0, 2, 0, 3, 4, 5 }; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_write8(0x4c, 0); /* Reset GF1 */ gus_delay(); gus_delay(); @@ -850,7 +801,7 @@ if (iw_mode) gus_write8(0x19, gus_read8(0x19) | 0x01); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } @@ -1159,17 +1110,16 @@ { unsigned long flags; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); /* voice_alloc->map[voice] = 0xffff; */ if (voices[voice].volume_irq_mode == VMODE_START_NOTE) { voices[voice].kill_pending = 1; - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } else { - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); gus_voice_fade(voice); } @@ -1227,8 +1177,7 @@ compute_volume(voice, volume); voices[voice].current_volume = voices[voice].initial_volume; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); /* * CAUTION! Interrupts disabled. Enable them before returning */ @@ -1242,7 +1191,7 @@ { gus_rampoff(); gus_voice_volume(target); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); return; } if (ramp_time == FAST_RAMP) @@ -1255,7 +1204,7 @@ { gus_rampoff(); gus_voice_volume(target); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); return; } if (target > curr) @@ -1273,7 +1222,7 @@ gus_ramp_range(target, curr); gus_rampon(0x40); /* Ramp down, once, no irq */ } - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } static void dynamic_volume_change(int voice) @@ -1281,11 +1230,10 @@ unsigned char status; unsigned long flags; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); status = gus_read8(0x00); /* Get voice status */ - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); if (status & 0x03) return; /* Voice was not running */ @@ -1300,11 +1248,10 @@ * Voice is running and has envelopes. */ - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); status = gus_read8(0x0d); /* Ramping status */ - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); if (status & 0x03) /* Sustain phase? */ { @@ -1336,11 +1283,10 @@ freq = compute_finetune(voices[voice].orig_freq, value, voices[voice].bender_range, 0); voices[voice].current_freq = freq; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_voice_freq(freq); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } break; @@ -1497,17 +1443,12 @@ ((sample_ptrs[sample] + samples[sample].len) / GUS_BANK_SIZE)) printk(KERN_ERR "GUS: Sample address error\n"); } - /************************************************************************* - * CAUTION! Interrupts disabled. Don't return before enabling - *************************************************************************/ - - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_voice_off(); gus_rampoff(); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); if (voices[voice].mode & WAVE_ENVELOPES) { @@ -1519,8 +1460,7 @@ compute_and_set_volume(voice, volume, 0); } - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); if (samples[sample].mode & WAVE_LOOP_BACK) @@ -1560,7 +1500,7 @@ gus_voice_freq(freq); gus_voice_balance(pan); gus_voice_on(mode); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); return 0; } @@ -1577,8 +1517,7 @@ int mode; int ret_val = 0; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); if (note_num == 255) { if (voices[voice].volume_irq_mode == VMODE_START_NOTE) @@ -1604,11 +1543,10 @@ if (voices[voice].sample_pending >= 0) { - restore_flags(flags); /* Run temporarily with interrupts enabled */ + spin_unlock_irqrestore(&lock, flags); /* Run temporarily with interrupts enabled */ guswave_set_instr(voices[voice].dev_pending, voice, voices[voice].sample_pending); voices[voice].sample_pending = -1; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); /* Reselect the voice (just to be sure) */ } if ((mode & 0x01) || (int) ((gus_read16(0x09) >> 4) < (unsigned) 2065)) @@ -1628,7 +1566,7 @@ gus_rampon(0x20 | 0x40); /* Ramp down, once, irq */ } } - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); return ret_val; } @@ -1871,9 +1809,7 @@ blk_sz)) return -EFAULT; - save_flags(flags); - cli(); - /******** INTERRUPTS DISABLED NOW ********/ + spin_lock_irqsave(&lock, flags); gus_write8(0x41, 0); /* Disable GF1 DMA */ DMAbuf_start_dma(gus_devnum, audio_devs[gus_devnum]->dmap_out->raw_buf_phys, blk_sz, DMA_MODE_WRITE); @@ -1924,16 +1860,15 @@ if (audio_devs[gus_devnum]->dmap_out->dma > 3) dma_command |= 0x04; /* 16 bit DMA _channel_ */ - gus_write8(0x41, dma_command); /* Lets go luteet (=bugs) */ - /* * Sleep here until the DRAM DMA done interrupt is served */ active_device = GUS_DEV_WAVE; + gus_write8(0x41, dma_command); /* Lets go luteet (=bugs) */ + spin_unlock_irqrestore(&lock, flags); /* opens a race */ if (!interruptible_sleep_on_timeout(&dram_sleeper, HZ)) printk("GUS: DMA Transfer timed out\n"); - restore_flags(flags); } /* @@ -1972,11 +1907,10 @@ switch (cmd) { case _GUS_NUMVOICES: - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_select_max_voices(p1); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); break; case _GUS_VOICESAMPLE: @@ -1984,20 +1918,18 @@ break; case _GUS_VOICEON: - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); p1 &= ~0x20; /* Don't allow interrupts */ gus_voice_on(p1); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); break; case _GUS_VOICEOFF: - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_voice_off(); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); break; case _GUS_VOICEFADE: @@ -2005,36 +1937,32 @@ break; case _GUS_VOICEMODE: - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); p1 &= ~0x20; /* Don't allow interrupts */ gus_voice_mode(p1); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); break; case _GUS_VOICEBALA: - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_voice_balance(p1); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); break; case _GUS_VOICEFREQ: - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_voice_freq(plong); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); break; case _GUS_VOICEVOL: - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_voice_volume(p1); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); break; case _GUS_VOICEVOL2: /* Just update the software voice level */ @@ -2044,53 +1972,48 @@ case _GUS_RAMPRANGE: if (voices[voice].mode & WAVE_ENVELOPES) break; /* NO-NO */ - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_ramp_range(p1, p2); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); break; case _GUS_RAMPRATE: if (voices[voice].mode & WAVE_ENVELOPES) break; /* NJET-NJET */ - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_ramp_rate(p1, p2); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); break; case _GUS_RAMPMODE: if (voices[voice].mode & WAVE_ENVELOPES) break; /* NO-NO */ - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); p1 &= ~0x20; /* Don't allow interrupts */ gus_ramp_mode(p1); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); break; case _GUS_RAMPON: if (voices[voice].mode & WAVE_ENVELOPES) break; /* EI-EI */ - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); p1 &= ~0x20; /* Don't allow interrupts */ gus_rampon(p1); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); break; case _GUS_RAMPOFF: if (voices[voice].mode & WAVE_ENVELOPES) break; /* NEJ-NEJ */ - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_rampoff(); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); break; case _GUS_VOLUME_SCALE: @@ -2099,11 +2022,10 @@ break; case _GUS_VOICE_POS: - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_set_voice_pos(voice, plong); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); break; default: @@ -2294,13 +2216,12 @@ if (pcm_active && pcm_opened) for (voice = 0; voice < gus_audio_channels; voice++) { - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_rampoff(); gus_voice_volume(1530 + (25 * gus_pcm_volume)); gus_ramp_range(65, 1530 + (25 * gus_pcm_volume)); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } } @@ -2348,8 +2269,7 @@ if (chn == 0) ramp_mode[chn] = 0x04; /* Enable rollover bit */ } - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(chn); gus_voice_freq(speed); @@ -2386,18 +2306,17 @@ 0, is16bits); /* Loop end location */ else mode[chn] |= 0x08; /* Enable looping */ - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } for (chn = 0; chn < gus_audio_channels; chn++) { - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(chn); gus_write8(0x0d, ramp_mode[chn]); if (iw_mode) gus_write8(0x15, 0x00); /* Reset voice deactivate bit of SMSI */ gus_voice_on(mode[chn]); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } pcm_active = 1; } @@ -2419,8 +2338,7 @@ unsigned char dma_command; unsigned long address, hold_address; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); count = total_count / gus_audio_channels; @@ -2485,7 +2403,7 @@ active_device = GUS_DEV_PCM_CONTINUE; } - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } static void gus_uninterleave8(char *buf, int l) @@ -2547,8 +2465,7 @@ unsigned long flags; unsigned char mode; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); DMAbuf_start_dma(dev, buf, count, DMA_MODE_READ); mode = 0xa0; /* DMA IRQ enabled, invert MSB */ @@ -2560,7 +2477,7 @@ mode |= 0x01; /* DMA enable */ gus_write8(0x49, mode); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } static int gus_audio_prepare_for_input(int dev, int bsize, int bcount) @@ -2656,11 +2573,10 @@ freq = compute_finetune(voices[voice].orig_freq, value - 8192, voices[voice].bender_range, 0); voices[voice].current_freq = freq; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); gus_voice_freq(freq); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } static int guswave_alloc(int dev, int chn, int note, struct voice_alloc_info *alloc) @@ -2741,8 +2657,7 @@ if (have_gus_max) /* Don't disturb GUS MAX */ return; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); /* * Enable channels having vol > 10% @@ -2768,7 +2683,7 @@ mix_image |= mask & 0x07; outb((mix_image), u_Mixer); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } #define MIX_DEVS (SOUND_MASK_MIC|SOUND_MASK_LINE| \ @@ -2977,11 +2892,10 @@ * Versions < 3.6 don't have the digital ASIC. Try to probe it first. */ - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); outb((0x20), gus_base + 0x0f); val = inb(gus_base + 0x0f); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); if (gus_pnp_flag || (val != 0xff && (val & 0x06))) /* Should be 0x02?? */ { @@ -3206,15 +3120,13 @@ vfree(samples); samples=NULL; } - +/* called in interrupt context */ static void do_loop_irq(int voice) { unsigned char tmp; int mode, parm; - unsigned long flags; - save_flags(flags); - cli(); + spin_lock(&lock); gus_select_voice(voice); tmp = gus_read8(0x00); @@ -3290,7 +3202,7 @@ default: break; } - restore_flags(flags); + spin_unlock(&lock); } static void do_volume_irq(int voice) @@ -3299,8 +3211,7 @@ int mode, parm; unsigned long flags; - save_flags(flags); - cli(); + spin_lock_irqsave(&lock, flags); gus_select_voice(voice); tmp = gus_read8(0x0d); @@ -3318,18 +3229,18 @@ case VMODE_HALT: /* Decay phase finished */ if (iw_mode) gus_write8(0x15, 0x02); /* Set voice deactivate bit of SMSI */ - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); gus_voice_init(voice); break; case VMODE_ENVELOPE: gus_rampoff(); - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); step_envelope(voice); break; case VMODE_START_NOTE: - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); guswave_start_note2(voices[voice].dev_pending, voice, voices[voice].note_pending, voices[voice].volume_pending); if (voices[voice].kill_pending) @@ -3345,11 +3256,10 @@ break; default: - restore_flags(flags); + spin_unlock_irqrestore(&lock, flags); } - restore_flags(flags); } - +/* called in irq context */ void gus_voice_irq(void) { unsigned long wave_ignore = 0, volume_ignore = 0; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/