b3c21e4919
Get tape device lock with interrupts disabled. Otherwise lockdep will issue a warning similar to: ================================= [ INFO: inconsistent lock state ] 2.6.27 #1 --------------------------------- inconsistent {in-hardirq-W} -> {hardirq-on-W} usage. vol_id/2903 [HC0[0]:SC0[0]:HE1:SE1] takes: (sch->lock){++..}, at: [<000003e00004c7a2>] tape_open+0x42/0x1a4 [tape] {in-hardirq-W} state was registered at: [<000000000007ce5c>] __lock_acquire+0x894/0xa74 [<000000000007d0ce>] lock_acquire+0x92/0xb8 [<0000000000345154>] _spin_lock+0x5c/0x9c [<0000000000202264>] do_IRQ+0x124/0x1f0 [<0000000000026610>] io_return+0x0/0x8 irq event stamp: 847 hardirqs last enabled at (847): [<000000000007aca6>] trace_hardirqs_on+0x2a/0x38 hardirqs last disabled at (846): [<0000000000076ca2>] trace_hardirqs_off+0x2a/0x38 softirqs last enabled at (0): [<000000000004909e>] copy_process+0x43e/0x11f4 softirqs last disabled at (0): [<0000000000000000>] 0x0 other info that might help us debug this: 1 lock held by vol_id/2903: #0: (&bdev->bd_mutex){--..}, at: [<000000000010e0f4>] do_open+0x78/0x358 stack backtrace: CPU: 1 Not tainted 2.6.27 #1}, Process vol_id (pid: 2903, task: 000000003d4c0000, ksp: 000000003d4e3b10) 0400000000000000 000000003d4e3830 0000000000000002 0000000000000000 000000003d4e38d0 000000003d4e3848 000000003d4e3848 00000000000168a8 0000000000000000 000000003d4e3b10 0000000000000000 0000000000000000 000000003d4e3830 000000000000000c 000000003d4e3830 000000003d4e38a0 000000000034aa98 00000000000168a8 000000003d4e3830 000000003d4e3880 Call Trace: ([<000000000001681c>] show_trace+0x138/0x158) [<0000000000016902>] show_stack+0xc6/0xf8 [<00000000000170d4>] dump_stack+0xb0/0xc0 [<0000000000078810>] print_usage_bug+0x1e8/0x228 [<000000000007a71c>] mark_lock+0xb14/0xd24 [<000000000007cd5a>] __lock_acquire+0x792/0xa74 [<000000000007d0ce>] lock_acquire+0x92/0xb8 [<0000000000345154>] _spin_lock+0x5c/0x9c [<000003e00004c7a2>] tape_open+0x42/0x1a4 [tape] [<000003e00005185c>] tapeblock_open+0x98/0xd0 [tape] Signed-off-by: Frank Munzert <munzert@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> |
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| .. | ||
| con3215.c | ||
| con3270.c | ||
| ctrlchar.c | ||
| ctrlchar.h | ||
| defkeymap.c | ||
| defkeymap.map | ||
| fs3270.c | ||
| Kconfig | ||
| keyboard.c | ||
| keyboard.h | ||
| Makefile | ||
| monreader.c | ||
| monwriter.c | ||
| raw3270.c | ||
| raw3270.h | ||
| sclp.c | ||
| sclp.h | ||
| sclp_cmd.c | ||
| sclp_con.c | ||
| sclp_config.c | ||
| sclp_cpi.c | ||
| sclp_cpi_sys.c | ||
| sclp_cpi_sys.h | ||
| sclp_quiesce.c | ||
| sclp_rw.c | ||
| sclp_rw.h | ||
| sclp_sdias.c | ||
| sclp_tty.c | ||
| sclp_tty.h | ||
| sclp_vt220.c | ||
| tape.h | ||
| tape_34xx.c | ||
| tape_3590.c | ||
| tape_3590.h | ||
| tape_block.c | ||
| tape_char.c | ||
| tape_class.c | ||
| tape_class.h | ||
| tape_core.c | ||
| tape_proc.c | ||
| tape_std.c | ||
| tape_std.h | ||
| tty3270.c | ||
| tty3270.h | ||
| vmcp.c | ||
| vmcp.h | ||
| vmlogrdr.c | ||
| vmur.c | ||
| vmur.h | ||
| vmwatchdog.c | ||
| zcore.c | ||