[PATCH 1/2] remove direct call to tty_wakeup in pty_write.

[Andre Naujoks]

Signed-off-by: Andre Naujoks <nautsch2@xxxxxxxxxxxxxx>
---
 drivers/tty/pty.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index abfd990..5dcb782 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -127,7 +127,6 @@ static int pty_write(struct tty_struct *tty, const
unsigned char *buf, int c)
 		/* And shovel */
 		if (c) {
 			tty_flip_buffer_push(to->port);
-			tty_wakeup(tty);
 		}
 	}
 	return c;
-- 
1.8.3.1

Regards
  Andre Naujoks

Kernel-Panic:

[   61.764168] ------------[ cut here ]------------
[   61.765107] WARNING: at
/build/linux-9VFSO6/linux-3.9.4/kernel/softirq.c:160
_local_bh_enable_ip.isra.16+0x33/0x88()
[   61.766467] Hardware name: Bochs
[   61.766900] Modules linked in: can_raw
[   61.768420] ------------[ cut here ]------------
[   61.771474] kernel BUG at
/build/linux-9VFSO6/linux-3.9.4/kernel/sched/core.c:524!
[   61.772378] invalid opcode: 0000 [#1] SMP
[   61.772378] Modules linked in: can_raw can slcan vcan nfsv4 nfsd
auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc loop snd_pcm
snd_page_alloc kvm_amd snd_timer kvm snd ttm soundcore drm_kms_helper
parport_pc parport drm i2c_piix4 psmouse i2c_core processor pcspkr
serio_raw thermal_sys evdev button ext4 crc16 jbd2 mbcache sg sr_mod
sd_mod crc_t10dif cdrom ata_generic virtio_net floppy ata_piix
virtio_pci virtio_ring virtio libata scsi_mod
[   61.772378] CPU 0
[   61.772378] Pid: 2547, comm: socat Not tainted 3.9-1-amd64 #1 Debian
3.9.4-1 Bochs Bochs
[   61.772378] RIP: 0010:[<ffffffff8106212f>]  [<ffffffff8106212f>]
resched_task+0x26/0x5d
[   61.772378] RSP: 0018:ffff88007fc03e38  EFLAGS: 00010046
[   61.772378] RAX: 0000000000000000 RBX: ffff88003739f7f0 RCX:
0000000000416036
[   61.772378] RDX: 0000000000000000 RSI: 0000000000000c00 RDI:
ffff88007a9ba000
[   61.772378] RBP: ffff88007fc13f30 R08: 0000000000000004 R09:
0000000000000001
[   61.772378] R10: 00000000000016af R11: 000000000000b768 R12:
00000000001e8480
[   61.772378] R13: ffff88007fc13ec0 R14: 0000000000000000 R15:
ffff88007fc03f50
[   61.772378] FS:  00007f2c71d11700(0000) GS:ffff88007fc00000(0000)
knlGS:0000000000000000
[   61.772378] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[   61.772378] CR2: 0000000001882808 CR3: 00000000370fe000 CR4:
00000000000006f0
[   61.772378] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[   61.772378] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400
[   61.772378] Process socat (pid: 2547, threadinfo ffff88007a9ba000,
task ffff88003739f7f0)
[   61.772378] Stack:
[   61.772378]  ffff88003739f838 ffffffff810685f8 ffff88007fc13ec0
0000000000000000
[   61.772378]  ffff88003739f7f0 ffff88007fc0e2b0 ffffffff8107b14d
ffffffff81063a65
[   61.772378]  ffff88003739f7f0 0000000000000000 0000000000000000
ffffffff8104a51d
[   61.772378] Call Trace:
[   61.772378]  <IRQ>
[   61.772378]  [<ffffffff810685f8>] ? task_tick_fair+0x91/0xf5
[   61.772378]  [<ffffffff8107b14d>] ? tick_sched_do_timer+0x25/0x25
[   61.772378]  [<ffffffff81063a65>] ? scheduler_tick+0xb5/0xdd
[   61.772378]  [<ffffffff8104a51d>] ? update_process_times+0x50/0x5c
[   61.772378]  [<ffffffff8107aea3>] ? tick_sched_handle+0x3f/0x4c
[   61.772378]  [<ffffffff8107b17d>] ? tick_sched_timer+0x30/0x4c
[   61.772378]  [<ffffffff8105a481>] ? __run_hrtimer+0xae/0x154
[   61.772378]  [<ffffffff8105ad13>] ? hrtimer_interrupt+0xc5/0x1a7
[   61.772378]  [<ffffffff81028c8f>] ? smp_apic_timer_interrupt+0x6e/0x81
[   61.772378]  [<ffffffff813961dd>] ? apic_timer_interrupt+0x6d/0x80
[   61.772378]  <EOI>
[   61.772378]  [<ffffffff8103d61a>] ? arch_local_irq_restore+0x2/0x8
[   61.772378]  [<ffffffff8103f5a9>] ? vprintk_emit+0x3be/0x3e4
[   61.772378]  [<ffffffff8103ed4a>] ? wake_up_klogd+0x2d/0x31
[   61.772378]  [<ffffffff81043bd8>] ? _local_bh_enable_ip.isra.16+0x33/0x88
[   61.772378]  [<ffffffff8138a939>] ? printk+0x4f/0x54
[   61.772378]  [<ffffffff810850b5>] ? print_modules+0x51/0xb8
[   61.772378]  [<ffffffff8103d537>] ? warn_slowpath_common+0x71/0x8c
[   61.772378]  [<ffffffff81043bd8>] ? _local_bh_enable_ip.isra.16+0x33/0x88
[   61.772378]  [<ffffffff813028b6>] ? tcp_sendmsg+0x1f/0x7ca
[   61.772378]  [<ffffffff8105eaea>] ? __wake_up+0x35/0x46
[   61.772378]  [<ffffffff812bc3ad>] ? sock_aio_write+0xc8/0xed
[   61.772378]  [<ffffffff8105eaea>] ? __wake_up+0x35/0x46
[   61.772378]  [<ffffffff8110cf93>] ? do_sync_write+0x62/0x9b
[   61.772378]  [<ffffffff8110d541>] ? vfs_write+0x9d/0xf8
[   61.772378]  [<ffffffff81061600>] ? should_resched+0x5/0x23
[   61.772378]  [<ffffffff8110d828>] ? sys_write+0x51/0x80
[   61.772378]  [<ffffffff813955e9>] ? system_call_fastpath+0x16/0x1b
[   61.772378] Code: 00 5b 5b 5d c3 53 48 89 fb 48 8b 7f 08 48 c7 c0 c0
3e 01 00 8b 57 18 48 03 04 d5 80 eb 68 81 8b 00 89 c2 c1 ea 10 66 39 c2
75 02 <0f> 0b 48 8b 47 10 a8 08 75 2b e8 d7 ec ff ff 48 8b 43 08 8b 78
[   61.772378] RIP  [<ffffffff8106212f>] resched_task+0x26/0x5d
[   61.772378]  RSP <ffff88007fc03e38>
[   61.772378] ---[ end trace e7680e6512133308 ]---
[   61.772378] Kernel panic - not syncing: Fatal exception in interrupt





--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/