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Message-ID: <4A5C5FD0.3020204@fisher-privat.net>
Date:	Tue, 14 Jul 2009 12:37:04 +0200
From:	Alexey Fisher <bug-track@...her-privat.net>
To:	Catalin Marinas <catalin.marinas@....com>
CC:	Pekka Enberg <penberg@...helsinki.fi>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Sam Ravnborg <sam@...nborg.org>, Ingo Molnar <mingo@...e.hu>,
	x86@...nel.org
Subject: Re: [PATCH] x86: _edata should include all .data.* sections on	X86_64

Catalin Marinas schrieb:
> On Tue, 2009-07-14 at 12:13 +0200, Alexey Fisher wrote:
>> With this patch i have only 25 reports....
>> but i still have a lot of ext4 and some other reports.
> 
> Apart from ext4, what are the other reports?
> 
> Thanks.
> 

this is complete trace from debug/kmemleak .
i will compile now latest linux-arm.org/linux-2.6.git

but i think i need step by step howto... it's really new for me.

unreferenced object 0xffff88013711c2a8 (size 64):
   comm "swapper", pid 1, jiffies 4294892383
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff81263b41>] kzalloc+0xf/0x11
     [<ffffffff8126416d>] acpi_add_single_object+0x5b0/0xd5a
     [<ffffffff81264b32>] acpi_bus_scan+0x125/0x1af
     [<ffffffff8176dcb7>] acpi_scan_init+0xc8/0xe9
     [<ffffffff8176da72>] acpi_init+0x21f/0x265
     [<ffffffff8100905b>] do_one_initcall+0x4b/0x190
     [<ffffffff8174b6ef>] kernel_init+0x169/0x1bf
     [<ffffffff8100c69a>] child_rip+0xa/0x20
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8801349aa150 (size 96):
   comm "swapper", pid 1, jiffies 4294892492
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f4b8b>] kmem_cache_alloc+0xfb/0x180
     [<ffffffff811f815f>] new_inode_smack+0x2f/0xc0
     [<ffffffff811f8215>] smack_inode_alloc_security+0x25/0x40
     [<ffffffff811f0cdc>] security_inode_alloc+0x1c/0x20
     [<ffffffff811135a5>] inode_init_always+0xc5/0x220
     [<ffffffff8111372c>] alloc_inode+0x2c/0x50
     [<ffffffff81113778>] new_inode+0x28/0xc0
     [<ffffffff8111d581>] simple_fill_super+0x41/0x200
     [<ffffffff811f8da5>] smk_fill_super+0x25/0x70
     [<ffffffff81100ed8>] get_sb_single+0x98/0xc0
     [<ffffffff811f8d73>] smk_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d14>] kern_mount_data+0x14/0x20
     [<ffffffff817677d0>] init_smk_fs+0x3b/0x7b
unreferenced object 0xffff880133bf8540 (size 96):
   comm "swapper", pid 1, jiffies 4294893530
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff8128b80c>] acpi_processor_register_performance+0x2ab/0x3eb
     [<ffffffff8101fc51>] acpi_cpufreq_cpu_init+0xb1/0x500
     [<ffffffff813b4004>] cpufreq_add_dev+0x154/0x650
     [<ffffffff81300926>] sysdev_driver_register+0xa6/0x130
     [<ffffffff813b3000>] cpufreq_register_driver+0x80/0x160
     [<ffffffff81754348>] acpi_cpufreq_init+0x91/0xc7
     [<ffffffff8100905b>] do_one_initcall+0x4b/0x190
     [<ffffffff8174b6ef>] kernel_init+0x169/0x1bf
     [<ffffffff8100c69a>] child_rip+0xa/0x20
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff880133bf85e8 (size 96):
   comm "swapper", pid 1, jiffies 4294893531
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff8128b80c>] acpi_processor_register_performance+0x2ab/0x3eb
     [<ffffffff8101fc51>] acpi_cpufreq_cpu_init+0xb1/0x500
     [<ffffffff813b4004>] cpufreq_add_dev+0x154/0x650
     [<ffffffff81300926>] sysdev_driver_register+0xa6/0x130
     [<ffffffff813b3000>] cpufreq_register_driver+0x80/0x160
     [<ffffffff81754348>] acpi_cpufreq_init+0x91/0xc7
     [<ffffffff8100905b>] do_one_initcall+0x4b/0x190
     [<ffffffff8174b6ef>] kernel_init+0x169/0x1bf
     [<ffffffff8100c69a>] child_rip+0xa/0x20
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff880132c48890 (size 1024):
   comm "exe", pid 1612, jiffies 4294894130
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff811ae061>] ext4_mb_init+0x1b1/0x5c0
     [<ffffffff8119f1e9>] ext4_fill_super+0x1e29/0x2720
     [<ffffffff8110111f>] get_sb_bdev+0x16f/0x1b0
     [<ffffffff81195413>] ext4_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d6d>] do_kern_mount+0x4d/0x120
     [<ffffffff81118ee7>] do_mount+0x307/0x8b0
     [<ffffffff8111951f>] sys_mount+0x8f/0xe0
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8801335be738 (size 192):
   comm "exe", pid 1612, jiffies 4294894130
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff811ae061>] ext4_mb_init+0x1b1/0x5c0
     [<ffffffff8119f1e9>] ext4_fill_super+0x1e29/0x2720
     [<ffffffff8110111f>] get_sb_bdev+0x16f/0x1b0
     [<ffffffff81195413>] ext4_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d6d>] do_kern_mount+0x4d/0x120
     [<ffffffff81118ee7>] do_mount+0x307/0x8b0
     [<ffffffff8111951f>] sys_mount+0x8f/0xe0
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8801329ac708 (size 128):
   comm "udevd", pid 1710, jiffies 4294894924
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f4b8b>] kmem_cache_alloc+0xfb/0x180
     [<ffffffff811325fa>] sys_inotify_add_watch+0xca/0x350
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8801329ac7d0 (size 128):
   comm "udevd", pid 1710, jiffies 4294894924
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f4b8b>] kmem_cache_alloc+0xfb/0x180
     [<ffffffff811325fa>] sys_inotify_add_watch+0xca/0x350
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8801329ac898 (size 128):
   comm "udevd", pid 1710, jiffies 4294894924
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f4b8b>] kmem_cache_alloc+0xfb/0x180
     [<ffffffff811325fa>] sys_inotify_add_watch+0xca/0x350
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8801329ac960 (size 128):
   comm "udevd", pid 1710, jiffies 4294894924
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f4b8b>] kmem_cache_alloc+0xfb/0x180
     [<ffffffff811325fa>] sys_inotify_add_watch+0xca/0x350
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8801329aca28 (size 128):
   comm "udevd", pid 1710, jiffies 4294894925
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f4b8b>] kmem_cache_alloc+0xfb/0x180
     [<ffffffff811325fa>] sys_inotify_add_watch+0xca/0x350
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8801329acaf0 (size 128):
   comm "udevd", pid 1710, jiffies 4294894925
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f4b8b>] kmem_cache_alloc+0xfb/0x180
     [<ffffffff811325fa>] sys_inotify_add_watch+0xca/0x350
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8801329acbb8 (size 128):
   comm "udevd", pid 1710, jiffies 4294894925
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f4b8b>] kmem_cache_alloc+0xfb/0x180
     [<ffffffff811325fa>] sys_inotify_add_watch+0xca/0x350
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8801329ace10 (size 128):
   comm "udevd", pid 1710, jiffies 4294894925
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f4b8b>] kmem_cache_alloc+0xfb/0x180
     [<ffffffff811325fa>] sys_inotify_add_watch+0xca/0x350
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff88012f48d440 (size 64):
   comm "mount", pid 2393, jiffies 4294896562
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff811ae061>] ext4_mb_init+0x1b1/0x5c0
     [<ffffffff8119f1e9>] ext4_fill_super+0x1e29/0x2720
     [<ffffffff8110111f>] get_sb_bdev+0x16f/0x1b0
     [<ffffffff81195413>] ext4_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d6d>] do_kern_mount+0x4d/0x120
     [<ffffffff81118ee7>] do_mount+0x307/0x8b0
     [<ffffffff8111951f>] sys_mount+0x8f/0xe0
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff880132815158 (size 1024):
   comm "mount", pid 2393, jiffies 4294896569
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff811ae061>] ext4_mb_init+0x1b1/0x5c0
     [<ffffffff8119f1e9>] ext4_fill_super+0x1e29/0x2720
     [<ffffffff8110111f>] get_sb_bdev+0x16f/0x1b0
     [<ffffffff81195413>] ext4_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d6d>] do_kern_mount+0x4d/0x120
     [<ffffffff81118ee7>] do_mount+0x307/0x8b0
     [<ffffffff8111951f>] sys_mount+0x8f/0xe0
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8801328159e8 (size 1024):
   comm "mount", pid 2393, jiffies 4294896569
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff811ae061>] ext4_mb_init+0x1b1/0x5c0
     [<ffffffff8119f1e9>] ext4_fill_super+0x1e29/0x2720
     [<ffffffff8110111f>] get_sb_bdev+0x16f/0x1b0
     [<ffffffff81195413>] ext4_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d6d>] do_kern_mount+0x4d/0x120
     [<ffffffff81118ee7>] do_mount+0x307/0x8b0
     [<ffffffff8111951f>] sys_mount+0x8f/0xe0
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff880132816b08 (size 1024):
   comm "mount", pid 2393, jiffies 4294896569
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff811ae061>] ext4_mb_init+0x1b1/0x5c0
     [<ffffffff8119f1e9>] ext4_fill_super+0x1e29/0x2720
     [<ffffffff8110111f>] get_sb_bdev+0x16f/0x1b0
     [<ffffffff81195413>] ext4_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d6d>] do_kern_mount+0x4d/0x120
     [<ffffffff81118ee7>] do_mount+0x307/0x8b0
     [<ffffffff8111951f>] sys_mount+0x8f/0xe0
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8801328155a0 (size 1024):
   comm "mount", pid 2393, jiffies 4294896569
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff811ae061>] ext4_mb_init+0x1b1/0x5c0
     [<ffffffff8119f1e9>] ext4_fill_super+0x1e29/0x2720
     [<ffffffff8110111f>] get_sb_bdev+0x16f/0x1b0
     [<ffffffff81195413>] ext4_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d6d>] do_kern_mount+0x4d/0x120
     [<ffffffff81118ee7>] do_mount+0x307/0x8b0
     [<ffffffff8111951f>] sys_mount+0x8f/0xe0
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff880132812f18 (size 1024):
   comm "mount", pid 2393, jiffies 4294896583
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff811ae061>] ext4_mb_init+0x1b1/0x5c0
     [<ffffffff8119f1e9>] ext4_fill_super+0x1e29/0x2720
     [<ffffffff8110111f>] get_sb_bdev+0x16f/0x1b0
     [<ffffffff81195413>] ext4_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d6d>] do_kern_mount+0x4d/0x120
     [<ffffffff81118ee7>] do_mount+0x307/0x8b0
     [<ffffffff8111951f>] sys_mount+0x8f/0xe0
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff880132811568 (size 1024):
   comm "mount", pid 2393, jiffies 4294896583
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff811ae061>] ext4_mb_init+0x1b1/0x5c0
     [<ffffffff8119f1e9>] ext4_fill_super+0x1e29/0x2720
     [<ffffffff8110111f>] get_sb_bdev+0x16f/0x1b0
     [<ffffffff81195413>] ext4_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d6d>] do_kern_mount+0x4d/0x120
     [<ffffffff81118ee7>] do_mount+0x307/0x8b0
     [<ffffffff8111951f>] sys_mount+0x8f/0xe0
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff880132811120 (size 1024):
   comm "mount", pid 2393, jiffies 4294896583
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff811ae061>] ext4_mb_init+0x1b1/0x5c0
     [<ffffffff8119f1e9>] ext4_fill_super+0x1e29/0x2720
     [<ffffffff8110111f>] get_sb_bdev+0x16f/0x1b0
     [<ffffffff81195413>] ext4_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d6d>] do_kern_mount+0x4d/0x120
     [<ffffffff81118ee7>] do_mount+0x307/0x8b0
     [<ffffffff8111951f>] sys_mount+0x8f/0xe0
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff880132810cd8 (size 1024):
   comm "mount", pid 2393, jiffies 4294896583
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff811ae061>] ext4_mb_init+0x1b1/0x5c0
     [<ffffffff8119f1e9>] ext4_fill_super+0x1e29/0x2720
     [<ffffffff8110111f>] get_sb_bdev+0x16f/0x1b0
     [<ffffffff81195413>] ext4_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d6d>] do_kern_mount+0x4d/0x120
     [<ffffffff81118ee7>] do_mount+0x307/0x8b0
     [<ffffffff8111951f>] sys_mount+0x8f/0xe0
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff880132810890 (size 1024):
   comm "mount", pid 2393, jiffies 4294896583
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff811ae061>] ext4_mb_init+0x1b1/0x5c0
     [<ffffffff8119f1e9>] ext4_fill_super+0x1e29/0x2720
     [<ffffffff8110111f>] get_sb_bdev+0x16f/0x1b0
     [<ffffffff81195413>] ext4_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d6d>] do_kern_mount+0x4d/0x120
     [<ffffffff81118ee7>] do_mount+0x307/0x8b0
     [<ffffffff8111951f>] sys_mount+0x8f/0xe0
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff880132810448 (size 1024):
   comm "mount", pid 2393, jiffies 4294896583
   backtrace:
     [<ffffffff810fbaca>] create_object+0x13a/0x2c0
     [<ffffffff810fbd75>] kmemleak_alloc+0x25/0x60
     [<ffffffff810f596b>] __kmalloc+0x11b/0x210
     [<ffffffff811ae061>] ext4_mb_init+0x1b1/0x5c0
     [<ffffffff8119f1e9>] ext4_fill_super+0x1e29/0x2720
     [<ffffffff8110111f>] get_sb_bdev+0x16f/0x1b0
     [<ffffffff81195413>] ext4_get_sb+0x13/0x20
     [<ffffffff81100bf6>] vfs_kern_mount+0x76/0x180
     [<ffffffff81100d6d>] do_kern_mount+0x4d/0x120
     [<ffffffff81118ee7>] do_mount+0x307/0x8b0
     [<ffffffff8111951f>] sys_mount+0x8f/0xe0
     [<ffffffff8100b66b>] system_call_fastpath+0x16/0x1b
     [<ffffffffffffffff>] 0xffffffffffffffff
--
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