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The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications. For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.
After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out. Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.
Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
are flagged as __cpuinit -- so if we remove the __cpuinit from
arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
content into no-ops as early as possible, since that will get rid
of these warnings. In any case, they are temporary and harmless.
This removes all the arch/blackfin uses of the __cpuinit macros from
all C files. Currently blackfin does not have any __CPUINIT used in
assembly files.
[1] https://lkml.org/lkml/2013/5/20/589
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Bob Liu <lliubbo@gmail.com>
Cc: Sonic Zhang <sonic.zhang@analog.com>
Cc: uclinux-dist-devel@blackfin.uclinux.org
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications. For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.
After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out. Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.
Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
are flagged as __cpuinit -- so if we remove the __cpuinit from
arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
content into no-ops as early as possible, since that will get rid
of these warnings. In any case, they are temporary and harmless.
This removes all the arch/arm64 uses of the __cpuinit macros from
all C files. Currently arm64 does not have any __CPUINIT used in
assembly files.
[1] https://lkml.org/lkml/2013/5/20/589
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications. For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.
After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out. Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.
Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
are flagged as __cpuinit -- so if we remove the __cpuinit from
arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
content into no-ops as early as possible, since that will get rid
of these warnings. In any case, they are temporary and harmless.
This removes all the arch/sparc uses of the __cpuinit macros from
C files and removes __CPUINIT from assembly files. Note that even
though arch/sparc/kernel/trampoline_64.S has instances of ".previous"
in it, they are all paired off against explicit ".section" directives,
and not implicitly paired with __CPUINIT (unlike mips and arm were).
[1] https://lkml.org/lkml/2013/5/20/589
Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications. For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.
After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out. Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.
Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
and are flagged as __cpuinit -- so if we remove the __cpuinit from
the arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
related content into no-ops as early as possible, since that will get
rid of these warnings. In any case, they are temporary and harmless.
This removes all the ARM uses of the __cpuinit macros from C code,
and all __CPUINIT from assembly code. It also had two ".previous"
section statements that were paired off against __CPUINIT
(aka .section ".cpuinit.text") that also get removed here.
[1] https://lkml.org/lkml/2013/5/20/589
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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commit 3747069b25e419f6b51395f48127e9812abc3596 upstream.
The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications. For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.
After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out. Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.
Note that some harmless section mismatch warnings may result, since
notify_cpu_starting() and cpu_up() are arch independent (kernel/cpu.c)
and are flagged as __cpuinit -- so if we remove the __cpuinit from
the arch specific callers, we will also get section mismatch warnings.
As an intermediate step, we intend to turn the linux/init.h cpuinit
related content into no-ops as early as possible, since that will get
rid of these warnings. In any case, they are temporary and harmless.
Here, we remove all the MIPS __cpuinit from C code and __CPUINIT
from asm files. MIPS is interesting in this respect, because there
are also uasm users hiding behind their own renamed versions of the
__cpuinit macros.
[1] https://lkml.org/lkml/2013/5/20/589
[ralf@linux-mips.org: Folded in Paul's followup fix.]
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5494/
Patchwork: https://patchwork.linux-mips.org/patch/5495/
Patchwork: https://patchwork.linux-mips.org/patch/5509/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications. For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.
After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out. Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.
This removes all the parisc uses of the __cpuinit macros.
[1] https://lkml.org/lkml/2013/5/20/589
Acked-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Helge Deller <deller@gmx.de>
Cc: linux-parisc@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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The __cpuinit type of throwaway sections might have made sense
some time ago when RAM was more constrained, but now the savings
do not offset the cost and complications. For example, the fix in
commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time")
is a good example of the nasty type of bugs that can be created
with improper use of the various __init prefixes.
After a discussion on LKML[1] it was decided that cpuinit should go
the way of devinit and be phased out. Once all the users are gone,
we can then finally remove the macros themselves from linux/init.h.
This removes all the alpha uses of the __cpuinit macros.
[1] https://lkml.org/lkml/2013/5/20/589
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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In the -rt kernel (mrg), we hit the following dump:
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffff811573f1>] kmem_cache_alloc_node+0x51/0x180
PGD a2d39067 PUD b1641067 PMD 0
Oops: 0000 [#1] PREEMPT SMP
Modules linked in: sunrpc cpufreq_ondemand ipv6 tg3 joydev sg serio_raw pcspkr k8temp amd64_edac_mod edac_core i2c_piix4 e100 mii shpchp ext4 mbcache jbd2 sd_mod crc_t10dif sr_mod cdrom sata_svw ata_generic pata_acpi pata_serverworks radeon ttm drm_kms_helper drm hwmon i2c_algo_bit i2c_core dm_mirror dm_region_hash dm_log dm_mod
CPU 3
Pid: 20878, comm: hackbench Not tainted 3.6.11-rt25.14.el6rt.x86_64 #1 empty empty/Tyan Transport GT24-B3992
RIP: 0010:[<ffffffff811573f1>] [<ffffffff811573f1>] kmem_cache_alloc_node+0x51/0x180
RSP: 0018:ffff8800a9b17d70 EFLAGS: 00010213
RAX: 0000000000000000 RBX: 0000000001200011 RCX: ffff8800a06d8000
RDX: 0000000004d92a03 RSI: 00000000000000d0 RDI: ffff88013b805500
RBP: ffff8800a9b17dc0 R08: ffff88023fd14d10 R09: ffffffff81041cbd
R10: 00007f4e3f06e9d0 R11: 0000000000000246 R12: ffff88013b805500
R13: ffff8801ff46af40 R14: 0000000000000001 R15: 0000000000000000
FS: 00007f4e3f06e700(0000) GS:ffff88023fd00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 00000000a2d3a000 CR4: 00000000000007e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process hackbench (pid: 20878, threadinfo ffff8800a9b16000, task ffff8800a06d8000)
Stack:
ffff8800a9b17da0 ffffffff81202e08 ffff8800a9b17de0 000000d001200011
0000000001200011 0000000001200011 0000000000000000 0000000000000000
00007f4e3f06e9d0 0000000000000000 ffff8800a9b17e60 ffffffff81041cbd
Call Trace:
[<ffffffff81202e08>] ? current_has_perm+0x68/0x80
[<ffffffff81041cbd>] copy_process+0xdd/0x15b0
[<ffffffff810a2125>] ? rt_up_read+0x25/0x30
[<ffffffff8104369a>] do_fork+0x5a/0x360
[<ffffffff8107c66b>] ? migrate_enable+0xeb/0x220
[<ffffffff8100b068>] sys_clone+0x28/0x30
[<ffffffff81527423>] stub_clone+0x13/0x20
[<ffffffff81527152>] ? system_call_fastpath+0x16/0x1b
Code: 89 fc 89 75 cc 41 89 d6 4d 8b 04 24 65 4c 03 04 25 48 ae 00 00 49 8b 50 08 4d 8b 28 49 8b 40 10 4d 85 ed 74 12 41 83 fe ff 74 27 <48> 8b 00 48 c1 e8 3a 41 39 c6 74 1b 8b 75 cc 4c 89 c9 44 89 f2
RIP [<ffffffff811573f1>] kmem_cache_alloc_node+0x51/0x180
RSP <ffff8800a9b17d70>
CR2: 0000000000000000
---[ end trace 0000000000000002 ]---
Now, this uses SLUB pretty much unmodified, but as it is the -rt kernel
with CONFIG_PREEMPT_RT set, spinlocks are mutexes, although they do
disable migration. But the SLUB code is relatively lockless, and the
spin_locks there are raw_spin_locks (not converted to mutexes), thus I
believe this bug can happen in mainline without -rt features. The -rt
patch is just good at triggering mainline bugs ;-)
Anyway, looking at where this crashed, it seems that the page variable
can be NULL when passed to the node_match() function (which does not
check if it is NULL). When this happens we get the above panic.
As page is only used in slab_alloc() to check if the node matches, if
it's NULL I'm assuming that we can say it doesn't and call the
__slab_alloc() code. Is this a correct assumption?
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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... and use d_hash_and_lookup() instead of open-coding it, for fsck sake...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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just pass the name
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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llist_add(new, head) can simply use llist_add_batch(new, new, head),
no need to duplicate the code.
This obviously uninlines llist_add() and to me this is a win. But we
can make llist_add_batch() inline if this is desirable, in this case
gcc can notice that new_first == new_last if the caller is llist_add().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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1. This is mostly theoretical, but llist_add*() need ACCESS_ONCE().
Otherwise it is not guaranteed that the first cmpxchg() uses the
same value for old_entry and new_last->next.
2. These helpers cache the result of cmpxchg() and read the initial
value of head->first before the main loop. I do not think this
makes sense. In the likely case cmpxchg() succeeds, otherwise
it doesn't hurt to reload head->first.
I think it would be better to simplify the code and simply read
->first before cmpxchg().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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fput() and delayed_fput() can use llist and avoid the locking.
This is unlikely path, it is not that this change can improve
the performance, but this way the code looks simpler.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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A missed update to "fput: task_work_add() can fail if the caller has
passed exit_task_work()".
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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[suggested by Rasmus Villemoes] make O_DIRECTORY | O_RDWR part of O_TMPFILE;
that will fail on old kernels in a lot more cases than what I came up with.
And make sure O_CREAT doesn't get there...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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OMAP recently changed how the platforms are configured, so OMAP2/3/4 SoC
support is no longer enabled by default. Add them back.
Enable new ethernet driver for sunxi.
The i.MX console options moved due to resorting, no functional change.
Signed-off-by: Olof Johansson <olof@lixom.net>
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Static routes in this case are non-expiring routes which did not get
configured by autoconf or by icmpv6 redirects.
To make sure we actually get an ecmp route while searching for the first
one in this fib6_node's leafs, also make sure it matches the ecmp route
assumptions.
v2:
a) Removed RTF_EXPIRE check in dst.from chain. The check of RTF_ADDRCONF
already ensures that this route, even if added again without
RTF_EXPIRES (in case of a RA announcement with infinite timeout),
does not cause the rt6i_nsiblings logic to go wrong if a later RA
updates the expiration time later.
v3:
a) Allow RTF_EXPIRES routes to enter the ecmp route set. We have to do so,
because an pmtu event could update the RTF_EXPIRES flag and we would
not count this route, if another route joins this set. We now filter
only for RTF_GATEWAY|RTF_ADDRCONF|RTF_DYNAMIC, which are flags that
don't get changed after rt6_info construction.
Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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this bug:
https://bugzilla.redhat.com/show_bug.cgi?id=951695
Reported a dma debug backtrace:
WARNING: at lib/dma-debug.c:937 check_unmap+0x47d/0x930()
Hardware name: To Be Filled By O.E.M.
via-rhine 0000:00:12.0: DMA-API: device driver failed to check map error[device
address=0x0000000075a837b2] [size=90 bytes] [mapped as single]
Modules linked in: ip6_tables gspca_spca561 gspca_main videodev media
snd_hda_codec_realtek snd_hda_intel i2c_viapro snd_hda_codec snd_hwdep snd_seq
ppdev mperf via_rhine coretemp snd_pcm mii microcode snd_page_alloc snd_timer
snd_mpu401 snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore parport_pc
parport shpchp ata_generic pata_acpi radeon i2c_algo_bit drm_kms_helper ttm drm
pata_via sata_via i2c_core uinput
Pid: 295, comm: systemd-journal Not tainted 3.9.0-0.rc6.git2.1.fc20.x86_64 #1
Call Trace:
<IRQ> [<ffffffff81068dd0>] warn_slowpath_common+0x70/0xa0
[<ffffffff81068e4c>] warn_slowpath_fmt+0x4c/0x50
[<ffffffff8137ec6d>] check_unmap+0x47d/0x930
[<ffffffff810ace9f>] ? local_clock+0x5f/0x70
[<ffffffff8137f17f>] debug_dma_unmap_page+0x5f/0x70
[<ffffffffa0225edc>] ? rhine_ack_events.isra.14+0x3c/0x50 [via_rhine]
[<ffffffffa02275f8>] rhine_napipoll+0x1d8/0xd80 [via_rhine]
[<ffffffff815d3d51>] ? net_rx_action+0xa1/0x380
[<ffffffff815d3e22>] net_rx_action+0x172/0x380
[<ffffffff8107345f>] __do_softirq+0xff/0x400
[<ffffffff81073925>] irq_exit+0xb5/0xc0
[<ffffffff81724cd6>] do_IRQ+0x56/0xc0
[<ffffffff81719ff2>] common_interrupt+0x72/0x72
<EOI> [<ffffffff8170ff57>] ? __slab_alloc+0x4c2/0x526
[<ffffffff811992e0>] ? mmap_region+0x2b0/0x5a0
[<ffffffff810d5807>] ? __lock_is_held+0x57/0x80
[<ffffffff811992e0>] ? mmap_region+0x2b0/0x5a0
[<ffffffff811bf1bf>] kmem_cache_alloc+0x2df/0x360
[<ffffffff811992e0>] mmap_region+0x2b0/0x5a0
[<ffffffff811998e6>] do_mmap_pgoff+0x316/0x3d0
[<ffffffff81183ca0>] vm_mmap_pgoff+0x90/0xc0
[<ffffffff81197d6c>] sys_mmap_pgoff+0x4c/0x190
[<ffffffff81367d7e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[<ffffffff8101eb42>] sys_mmap+0x22/0x30
[<ffffffff81722fd9>] system_call_fastpath+0x16/0x1b
Usual problem with the usual fix, add the appropriate calls to dma_mapping_error
where appropriate
Untested, as I don't have hardware, but its pretty straightforward
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: David S. Miller <davem@davemloft.net>
CC: Roger Luethi <rl@hellgate.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Recently had this backtrace reported:
WARNING: at lib/dma-debug.c:937 check_unmap+0x47d/0x930()
Hardware name: System Product Name
ATL1E 0000:02:00.0: DMA-API: device driver failed to check map error[device
address=0x00000000cbfd1000] [size=90 bytes] [mapped as single]
Modules linked in: xt_conntrack nf_conntrack ebtable_filter ebtables
ip6table_filter ip6_tables snd_hda_codec_hdmi snd_hda_codec_realtek iTCO_wdt
iTCO_vendor_support snd_hda_intel acpi_cpufreq mperf coretemp btrfs zlib_deflate
snd_hda_codec snd_hwdep microcode raid6_pq libcrc32c snd_seq usblp serio_raw xor
snd_seq_device joydev snd_pcm snd_page_alloc snd_timer snd lpc_ich i2c_i801
soundcore mfd_core atl1e asus_atk0110 ata_generic pata_acpi radeon i2c_algo_bit
drm_kms_helper ttm drm i2c_core pata_marvell uinput
Pid: 314, comm: systemd-journal Not tainted 3.9.0-0.rc6.git2.3.fc19.x86_64 #1
Call Trace:
<IRQ> [<ffffffff81069106>] warn_slowpath_common+0x66/0x80
[<ffffffff8106916c>] warn_slowpath_fmt+0x4c/0x50
[<ffffffff8138151d>] check_unmap+0x47d/0x930
[<ffffffff810ad048>] ? sched_clock_cpu+0xa8/0x100
[<ffffffff81381a2f>] debug_dma_unmap_page+0x5f/0x70
[<ffffffff8137ce30>] ? unmap_single+0x20/0x30
[<ffffffffa01569a1>] atl1e_intr+0x3a1/0x5b0 [atl1e]
[<ffffffff810d53fd>] ? trace_hardirqs_off+0xd/0x10
[<ffffffff81119636>] handle_irq_event_percpu+0x56/0x390
[<ffffffff811199ad>] handle_irq_event+0x3d/0x60
[<ffffffff8111cb6a>] handle_fasteoi_irq+0x5a/0x100
[<ffffffff8101c36f>] handle_irq+0xbf/0x150
[<ffffffff811dcb2f>] ? file_sb_list_del+0x3f/0x50
[<ffffffff81073b10>] ? irq_enter+0x50/0xa0
[<ffffffff8172738d>] do_IRQ+0x4d/0xc0
[<ffffffff811dcb2f>] ? file_sb_list_del+0x3f/0x50
[<ffffffff8171c6b2>] common_interrupt+0x72/0x72
<EOI> [<ffffffff810db5b2>] ? lock_release+0xc2/0x310
[<ffffffff8109ea04>] lg_local_unlock_cpu+0x24/0x50
[<ffffffff811dcb2f>] file_sb_list_del+0x3f/0x50
[<ffffffff811dcb6d>] fput+0x2d/0xc0
[<ffffffff811d8ea1>] filp_close+0x61/0x90
[<ffffffff811fae4d>] __close_fd+0x8d/0x150
[<ffffffff811d8ef0>] sys_close+0x20/0x50
[<ffffffff81725699>] system_call_fastpath+0x16/0x1b
The usual straighforward failure to check for dma_mapping_error after a map
operation is completed.
This patch should fix it, the reporter wandered off after filing this bz:
https://bugzilla.redhat.com/show_bug.cgi?id=954170
and I don't have hardware to test, but the fix is pretty straightforward, so I
figured I'd post it for review.
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: Jay Cliburn <jcliburn@gmail.com>
CC: Chris Snook <chris.snook@gmail.com>
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Change snmp RETRANSFAILS stat to include timeout retransmit failures
in addition to other loss recoveries.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
>> drivers/net/usb/r815x.c:38:16: sparse: cast to restricted __le32
>> drivers/net/usb/r815x.c:67:15: sparse: cast to restricted __le32
>> drivers/net/usb/r815x.c:69:13: sparse: incorrect type in assignment (different base types)
drivers/net/usb/r815x.c:69:13: expected unsigned int [unsigned] [addressable] [assigned] [usertype] tmp
drivers/net/usb/r815x.c:69:13: got restricted __le32 [usertype] <noident>
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Spotted-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
config: make ARCH=avr32 allyesconfig
drivers/net/usb/r8152.c: In function 'rtl8152_start_xmit':
drivers/net/usb/r8152.c:956: warning: integer overflow in expression
955 memset(tx_desc, 0, sizeof(*tx_desc));
> 956 tx_desc->opts1 = cpu_to_le32((len & TX_LEN_MASK) | TX_FS | TX_LS);
957 tp->tx_skb = skb;
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Spotted-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Signed-off-by: Sunghan Suh <sunghan.suh@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
patch found using checkpatch.pl
Signed-off-by: Cosmin Stanescu <cosmin90stanescu@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
- Add i.MX serial console support. This gives us the boot messages on
UART on e.g. the i.MX6Q sabre sd platform.
- Add the necessary config options, to allow booting with NFS root on
an i.MX6 sabre sd.
- Add Freescale LPUART serial console support. This gives us the boot
messages on UART on e.g. the Vybrid VF610 Tower board.
Signed-off-by: Vincent Stehlé <vincent.stehle@freescale.com>
Cc: Russell King <linux@arm.linux.org.uk>
[olof: squashed three commits down to one]
Signed-off-by: Olof Johansson <olof@lixom.net>
|
|
I completely botched understanding the calling conventions of
do_div(). I assumed that do_div() returned the result instead
of realizing that it modifies its argument and returns a
remainder. The side-effect from this would be bogus numbers
for the "msecs" value in the warning messages:
INFO: NMI handler (perf_event_nmi_handler) took too long to run: 0.114 msecs
Note, there was a second fix posted by Stephane Eranian for
a separate patch which I also botched:
http://lkml.kernel.org/r/20130704223010.GA30625@quad
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dave Hansen <dave@sr71.net>
Link: http://lkml.kernel.org/r/20130708214404.B0B6EA66@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
David reported that the HRTICK sched feature was borken; which was enough
motivation for me to finally fix it ;-)
We should not allow hrtimer code to do softirq wakeups while holding scheduler
locks. The hrtimer code only needs this when we accidentally try to program an
expired time. We don't much care about those anyway since we have the regular
tick to fall back to.
Reported-by: David Ahern <dsahern@gmail.com>
Tested-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20130628091853.GE29209@dyad.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
On ARM systems the dummy clockevent is registered with the cpu
hotplug notifier chain before any other per-cpu clockevent. This
has the side-effect of causing the dummy clockevent to be
registered first in every hotplug sequence. Because the dummy is
first, we'll try to turn the broadcast source on but the code in
tick_device_uses_broadcast() assumes the broadcast source is in
periodic mode and calls tick_broadcast_start_periodic()
unconditionally.
On boot this isn't a problem because we typically haven't
switched into oneshot mode yet (if at all). During hotplug, if
the broadcast source isn't in periodic mode we'll replace the
broadcast oneshot handler with the broadcast periodic handler and
start emulating oneshot mode when we shouldn't. Due to the way
the broadcast oneshot handler programs the next_event it's
possible for it to contain KTIME_MAX and cause us to hang the
system when the periodic handler tries to program the next tick.
Fix this by using the appropriate function to start the broadcast
source.
Reported-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Mark Rutland <Mark.Rutland@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: ARM kernel mailing list <linux-arm-kernel@lists.infradead.org>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Joseph Lo <josephl@nvidia.com>
Link: http://lkml.kernel.org/r/20130711140059.GA27430@codeaurora.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
|
|
Move the definitions for wound/wait mutexes out to a separate
header, ww_mutex.h. This reduces clutter in mutex.h, and
increases readability.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Cc: Dave Airlie <airlied@gmail.com>
Link: http://lkml.kernel.org/r/51D675DC.3000907@canonical.com
[ Tidied up the code a bit. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
Jiri managed to trigger this warning:
[] ======================================================
[] [ INFO: possible circular locking dependency detected ]
[] 3.10.0+ #228 Tainted: G W
[] -------------------------------------------------------
[] p/6613 is trying to acquire lock:
[] (rcu_node_0){..-...}, at: [<ffffffff810ca797>] rcu_read_unlock_special+0xa7/0x250
[]
[] but task is already holding lock:
[] (&ctx->lock){-.-...}, at: [<ffffffff810f2879>] perf_lock_task_context+0xd9/0x2c0
[]
[] which lock already depends on the new lock.
[]
[] the existing dependency chain (in reverse order) is:
[]
[] -> #4 (&ctx->lock){-.-...}:
[] -> #3 (&rq->lock){-.-.-.}:
[] -> #2 (&p->pi_lock){-.-.-.}:
[] -> #1 (&rnp->nocb_gp_wq[1]){......}:
[] -> #0 (rcu_node_0){..-...}:
Paul was quick to explain that due to preemptible RCU we cannot call
rcu_read_unlock() while holding scheduler (or nested) locks when part
of the read side critical section was preemptible.
Therefore solve it by making the entire RCU read side non-preemptible.
Also pull out the retry from under the non-preempt to play nice with RT.
Reported-by: Jiri Olsa <jolsa@redhat.com>
Helped-out-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: <stable@kernel.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
The '!ctx->is_active' check has a valid scenario, so
there's no need for the warning.
The reason is that there's a time window between the
'ctx->is_active' check in the perf_event_enable() function
and the __perf_event_enable() function having:
- IRQs on
- ctx->lock unlocked
where the task could be killed and 'ctx' deactivated by
perf_event_exit_task(), ending up with the warning below.
So remove the WARN_ON_ONCE() check and add comments to
explain it all.
This addresses the following warning reported by Vince Weaver:
[ 324.983534] ------------[ cut here ]------------
[ 324.984420] WARNING: at kernel/events/core.c:1953 __perf_event_enable+0x187/0x190()
[ 324.984420] Modules linked in:
[ 324.984420] CPU: 19 PID: 2715 Comm: nmi_bug_snb Not tainted 3.10.0+ #246
[ 324.984420] Hardware name: Supermicro X8DTN/X8DTN, BIOS 4.6.3 01/08/2010
[ 324.984420] 0000000000000009 ffff88043fce3ec8 ffffffff8160ea0b ffff88043fce3f00
[ 324.984420] ffffffff81080ff0 ffff8802314fdc00 ffff880231a8f800 ffff88043fcf7860
[ 324.984420] 0000000000000286 ffff880231a8f800 ffff88043fce3f10 ffffffff8108103a
[ 324.984420] Call Trace:
[ 324.984420] <IRQ> [<ffffffff8160ea0b>] dump_stack+0x19/0x1b
[ 324.984420] [<ffffffff81080ff0>] warn_slowpath_common+0x70/0xa0
[ 324.984420] [<ffffffff8108103a>] warn_slowpath_null+0x1a/0x20
[ 324.984420] [<ffffffff81134437>] __perf_event_enable+0x187/0x190
[ 324.984420] [<ffffffff81130030>] remote_function+0x40/0x50
[ 324.984420] [<ffffffff810e51de>] generic_smp_call_function_single_interrupt+0xbe/0x130
[ 324.984420] [<ffffffff81066a47>] smp_call_function_single_interrupt+0x27/0x40
[ 324.984420] [<ffffffff8161fd2f>] call_function_single_interrupt+0x6f/0x80
[ 324.984420] <EOI> [<ffffffff816161a1>] ? _raw_spin_unlock_irqrestore+0x41/0x70
[ 324.984420] [<ffffffff8113799d>] perf_event_exit_task+0x14d/0x210
[ 324.984420] [<ffffffff810acd04>] ? switch_task_namespaces+0x24/0x60
[ 324.984420] [<ffffffff81086946>] do_exit+0x2b6/0xa40
[ 324.984420] [<ffffffff8161615c>] ? _raw_spin_unlock_irq+0x2c/0x30
[ 324.984420] [<ffffffff81087279>] do_group_exit+0x49/0xc0
[ 324.984420] [<ffffffff81096854>] get_signal_to_deliver+0x254/0x620
[ 324.984420] [<ffffffff81043057>] do_signal+0x57/0x5a0
[ 324.984420] [<ffffffff8161a164>] ? __do_page_fault+0x2a4/0x4e0
[ 324.984420] [<ffffffff8161665c>] ? retint_restore_args+0xe/0xe
[ 324.984420] [<ffffffff816166cd>] ? retint_signal+0x11/0x84
[ 324.984420] [<ffffffff81043605>] do_notify_resume+0x65/0x80
[ 324.984420] [<ffffffff81616702>] retint_signal+0x46/0x84
[ 324.984420] ---[ end trace 442ec2f04db3771a ]---
Reported-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Suggested-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1373384651-6109-2-git-send-email-jolsa@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
Currently when the child context for inherited events is
created, it's based on the pmu object of the first event
of the parent context.
This is wrong for the following scenario:
- HW context having HW and SW event
- HW event got removed (closed)
- SW event stays in HW context as the only event
and its pmu is used to clone the child context
The issue starts when the cpu context object is touched
based on the pmu context object (__get_cpu_context). In
this case the HW context will work with SW cpu context
ending up with following WARN below.
Fixing this by using parent context pmu object to clone
from child context.
Addresses the following warning reported by Vince Weaver:
[ 2716.472065] ------------[ cut here ]------------
[ 2716.476035] WARNING: at kernel/events/core.c:2122 task_ctx_sched_out+0x3c/0x)
[ 2716.476035] Modules linked in: nfsd auth_rpcgss oid_registry nfs_acl nfs locn
[ 2716.476035] CPU: 0 PID: 3164 Comm: perf_fuzzer Not tainted 3.10.0-rc4 #2
[ 2716.476035] Hardware name: AOpen DE7000/nMCP7ALPx-DE R1.06 Oct.19.2012, BI2
[ 2716.476035] 0000000000000000 ffffffff8102e215 0000000000000000 ffff88011fc18
[ 2716.476035] ffff8801175557f0 0000000000000000 ffff880119fda88c ffffffff810ad
[ 2716.476035] ffff880119fda880 ffffffff810af02a 0000000000000009 ffff880117550
[ 2716.476035] Call Trace:
[ 2716.476035] [<ffffffff8102e215>] ? warn_slowpath_common+0x5b/0x70
[ 2716.476035] [<ffffffff810ab2bd>] ? task_ctx_sched_out+0x3c/0x5f
[ 2716.476035] [<ffffffff810af02a>] ? perf_event_exit_task+0xbf/0x194
[ 2716.476035] [<ffffffff81032a37>] ? do_exit+0x3e7/0x90c
[ 2716.476035] [<ffffffff810cd5ab>] ? __do_fault+0x359/0x394
[ 2716.476035] [<ffffffff81032fe6>] ? do_group_exit+0x66/0x98
[ 2716.476035] [<ffffffff8103dbcd>] ? get_signal_to_deliver+0x479/0x4ad
[ 2716.476035] [<ffffffff810ac05c>] ? __perf_event_task_sched_out+0x230/0x2d1
[ 2716.476035] [<ffffffff8100205d>] ? do_signal+0x3c/0x432
[ 2716.476035] [<ffffffff810abbf9>] ? ctx_sched_in+0x43/0x141
[ 2716.476035] [<ffffffff810ac2ca>] ? perf_event_context_sched_in+0x7a/0x90
[ 2716.476035] [<ffffffff810ac311>] ? __perf_event_task_sched_in+0x31/0x118
[ 2716.476035] [<ffffffff81050dd9>] ? mmdrop+0xd/0x1c
[ 2716.476035] [<ffffffff81051a39>] ? finish_task_switch+0x7d/0xa6
[ 2716.476035] [<ffffffff81002473>] ? do_notify_resume+0x20/0x5d
[ 2716.476035] [<ffffffff813654f5>] ? retint_signal+0x3d/0x78
[ 2716.476035] ---[ end trace 827178d8a5966c3d ]---
Reported-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1373384651-6109-1-git-send-email-jolsa@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
|
|
Since commit ab78029 (drivers/pinctrl: grab default handles from device core),
we can rely on device core for setting the default pins. Compile tested only.
Acked-by: Linus Walleij <linus.walleij@linaro.org> (personally at LCE13)
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Since commit ab78029 (drivers/pinctrl: grab default handles from device core),
we can rely on device core for setting the default pins. Compile tested only.
Acked-by: Linus Walleij <linus.walleij@linaro.org> (personally at LCE13)
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Since commit ab78029 (drivers/pinctrl: grab default handles from device core),
we can rely on device core for setting the default pins. Compile tested only.
Acked-by: Linus Walleij <linus.walleij@linaro.org> (personally at LCE13)
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Base on cdc_ether, add the mii functions for RTL8152 and RTL8153.
The RTL8152 and RTL8153 support ECM mode which use the driver of
cdc_ether. Add the mii functions. Then, the basic PHY access is
possible.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Instead of passing each byte by stack let's use nice specifier for that.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
For copy_to/from_user() failure, the correct error code is -EFAULT not
-EPERM.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
|
|
This patch adds code to log SDMA errors for supportability purposes.
Signed-off-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
|
|
The vzalloc()'ed field physshadow is leaked on module unload.
This patch adds vfree after the sibling page shadow is freed.
Reported-by: Dean Luick <dean.luick@intel.com>
Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
|
|
Sparse reported an endianness bug in the assignment to hca_cap.uar_page_sz.
Fix the declaration of this field to be __be16 (which is what is in
the firmware spec), renaming the field to log_uar_pg_size to conform
to the spec, which fixes the endianness bug reported by sparse.
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Moshe Lazer <moshel@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
|
|
If the transport layer is offline it is more appropriate to let
srp_abort() return FAST_IO_FAIL instead of SUCCESS.
Reported-by: Sebastian Riemer <sebastian.riemer@profitbricks.com>
Acked-by: David Dillow <dillowda@ornl.gov>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Roland Dreier <roland@purestorage.com>
|
|
Signed-off-by: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
This change fixes an MTU sizing issue seen with gretap tunnels when non-gso
packets are sent from the interface.
In my case I was able to reproduce the issue by simply sending a ping of
1421 bytes with the gretap interface created on a device with a standard
1500 mtu.
This fix is based on the fact that the tunnel mtu is already adjusted by
dev->hard_header_len so it would make sense that any packets being compared
against that mtu should also be adjusted by hard_header_len and the tunnel
header instead of just the tunnel header.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Reported-by: Cong Wang <amwang@redhat.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
Paul Gortmaker
Linus Torvalds
Steven Rostedt
Al Viro
Oleg Nesterov
Andrew Morton
Olof Johansson
Hannes Frederic Sowa
Neil Horman
Yuchung Cheng
hayeswang
Sunghan Suh
“Cosmin
Vincent Stehlé
Dave Hansen
Peter Zijlstra
Stephen Boyd
Maarten Lankhorst
Jiri Olsa
Wolfram Sang
Andy Shevchenko
Dan Carpenter
Dean Luick
Mike Marciniszyn
Moshe Lazer
Bart Van Assche
Jitendra Kalsaria
Alexander Duyck