In some error handling cases the lock is not unlocked. The return is
converted to a goto, to share the unlock at the end of the function.
A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
expression E1;
identifier f;
@@
f (...) { <+...
* spin_lock_irq (E1,...);
... when != E1
* return ...;
...+> }
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
LKML-Reference: <Pine.LNX.4.64.1003291736440.21896@ask.diku.dk>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
# echo 1 > events/enable
# echo global > trace_clock
------------[ cut here ]------------
WARNING: at kernel/lockdep.c:3162 check_flags+0xb2/0x190()
...
---[ end trace 3f86734a89416623 ]---
possible reason: unannotated irqs-on.
...
There's no reason to use the raw_local_irq_save() in trace_clock_global.
The local_irq_save() version is fine, and does not cause the bug in lockdep.
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4BA97FA1.7030606@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
x86/PCI: truncate _CRS windows with _LEN > _MAX - _MIN + 1
x86/PCI: for host bridge address space collisions, show conflicting resource
frv/PCI: remove redundant warnings
x86/PCI: remove redundant warnings
PCI: don't say we claimed a resource if we failed
PCI quirk: Disable MSI on VIA K8T890 systems
PCI quirk: RS780/RS880: work around missing MSI initialization
PCI quirk: only apply CX700 PCI bus parking quirk if external VT6212L is present
PCI: complain about devices that seem to be broken
PCI: print resources consistently with %pR
PCI: make disabled window printk style match the enabled ones
PCI: break out primary/secondary/subordinate for readability
PCI: for address space collisions, show conflicting resource
resources: add interfaces that return conflict information
PCI: cleanup error return for pcix get and set mmrbc functions
PCI: fix access of PCI_X_CMD by pcix get and set mmrbc functions
PCI: kill off pci_register_set_vga_state() symbol export.
PCI: fix return value from pcix_get_max_mmrbc()
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2:
nilfs2: fix imperfect completion wait in nilfs_wait_on_logs
nilfs2: fix hang-up of cleaner after log writer returned with error
nilfs2: fix duplicate call to nilfs_segctor_cancel_freev
* 'urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/pcmcia-2.6:
pcmcia: use dev_pm_ops for class pcmcia_socket_class
power: support _noirq actions on device types and classes
pcmcia: allow for four multifunction subdevices (again)
pcmcia: do not use ioports < 0x100 on x86
pd6729: Coding Style fixes
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, amd: Restrict usage of c1e_idle()
x86: Fix placement of FIX_OHCI1394_BASE
x86: Handle legacy PIC interrupts on all the cpu's
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
time: Fix accumulation bug triggered by long delay.
posix-cpu-timers: Reset expire cache when no timer is running
timer stats: Fix del_timer_sync() and try_to_del_timer_sync()
clockevents: Sanitize min_delta_ns adjustment and prevent overflows
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
ring-buffer: Do 8 byte alignment for 64 bit that can not handle 4 byte align
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched: Use proper type in sched_getaffinity()
kernel/sched.c: Suppress unused var warning
sched: sched_getaffinity(): Allow less than NR_CPUS length
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
powerpc/perf_events: Fix call-graph recording, add perf_arch_fetch_caller_regs
perf top: Add missing initialization to zero
perf probe: Use original address instead of CU-based address
perf probe: Fix offset to allow signed value
perf top: Improve the autosizing of column lenghts
perf probe: Fix need_dwarf flag if lazy matching is used
perf probe: Fix probe_point buffer overrun
* 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
genirq: Move two IRQ functions from .init.text to .text
genirq: Protect access to irq_desc->action in can_request_irq()
genirq: Prevent oneshot irq thread race
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
firewire: core: align driver match with modalias
firewire: core: fix Model_ID in modalias
firewire: ohci: add cycle timer quirk for the TI TSB12LV22
firewire: core: fw_iso_resource_manage: fix error handling
Lose want_dir argument, while we are at it - since now
nd->flags & LOOKUP_DIRECTORY is equivalent to it.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Fix __get_user_pages() to make it pin the last page on a buffer that doesn't
begin at the start of a page, but is a multiple of PAGE_SIZE in size.
The problem is that __get_user_pages() advances the pointer too much when it
iterates to the next page if the page it's currently looking at isn't used from
the first byte. This can cause the end of a short VMA to be reached
prematurely, resulting in the last page being lost.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Revert the following patch:
commit c08c6e1f54
Author: Steven J. Magnani <steve@digidescorp.com>
Date: Fri Mar 5 13:42:24 2010 -0800
nommu: get_user_pages(): pin last page on non-page-aligned start
As it assumes that the mappings begin at the start of pages - something that
isn't necessarily true on NOMMU systems. On NOMMU systems, it is possible for
a mapping to only occupy part of the page, and not necessarily touch either end
of it; in fact it's also possible for multiple non-overlapping mappings to
coexist on one page (consider direct mappings of ROMFS files, for example).
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: Fixed inode allocator to correctly track a flex_bg's used_dirs
ext4: Don't use delayed allocation by default when used instead of ext3
ext4: Fix spelling of CONTIG_FS_EXT3 to CONFIG_FS_EXT3
ext4: Fix estimate of # of blocks needed to write indirect-mapped files
Compiling this driver gave a section mismatch,
so I reviewed the init/exit paths of the driver
and made the correct changes.
WARNING: drivers/isdn/hisax/built-in.o(.text+0x55e37): Section mismatch
in reference from the function elsa_cs_config() to the function
.devinit.text:hisax_init_pcmcia()
The function elsa_cs_config() references
the function __devinit hisax_init_pcmcia().
This is often because elsa_cs_config lacks a __devinit
annotation or the annotation of hisax_init_pcmcia is wrong.
Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
Acked-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Compiling this driver gave a section mismatch,
so I reviewed the init/exit paths of the driver
and made the correct changes.
WARNING: drivers/isdn/hisax/built-in.o(.text+0x56512): Section mismatch
in reference from the function avma1cs_config() to the function
.devinit.text:hisax_init_pcmcia()
The function avma1cs_config() references
the function __devinit hisax_init_pcmcia().
This is often because avma1cs_config lacks a __devinit
annotation or the annotation of hisax_init_pcmcia is wrong.
Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
Acked-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Compiling this driver gave a section mismatch,
so I reviewed the init/exit paths of the driver
and made the correct changes.
WARNING: drivers/isdn/hisax/built-in.o(.text+0x56bfb): Section mismatch
in reference from the function teles_cs_config() to the function
.devinit.text:hisax_init_pcmcia()
The function teles_cs_config() references
the function __devinit hisax_init_pcmcia().
This is often because teles_cs_config lacks a __devinit
annotation or the annotation of hisax_init_pcmcia is wrong.
Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
Acked-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Compiling this driver gave a section mismatch,
so I reviewed the init/exit paths of the driver
and made the correct changes.
WARNING: drivers/isdn/hisax/built-in.o(.text+0x558d6): Section mismatch
in reference from the function sedlbauer_config() to the function
.devinit.text:hisax_init_pcmcia()
The function sedlbauer_config() references
the function __devinit hisax_init_pcmcia().
This is often because sedlbauer_config lacks a __devinit
annotation or the annotation of hisax_init_pcmcia is wrong.
Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
Acked-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Julia Lawall
Li Zefan
Linus Torvalds
Al Viro
David Howells
Jon Maloy
Henne
David S. Miller