Commit Graph

398433 Commits

Author SHA1 Message Date
Vladimir Cernov
ec9bed9d38 mm/madvise.c: fix coding-style errors
This fixes following errors:
	- ERROR: "(foo*)" should be "(foo *)"
	- ERROR: "foo ** bar" should be "foo **bar"

Signed-off-by: Vladimir Cernov <gg.kaspersky@gmail.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:57:00 -07:00
Oleg Nesterov
ef0855d334 mm: mempolicy: turn vma_set_policy() into vma_dup_policy()
Simple cleanup.  Every user of vma_set_policy() does the same work, this
looks a bit annoying imho.  And the new trivial helper which does
mpol_dup() + vma_set_policy() to simplify the callers.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:57:00 -07:00
Jingoo Han
c07303c0af drivers/block/swim.c: remove unnecessary platform_set_drvdata()
The driver core clears the driver data to NULL after device_release or
on probe failure.  Thus, it is not needed to manually clear the device
driver data to NULL.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:59 -07:00
Mike Miller
e7b18ede44 cciss: set max scatter gather entries to 32 on P600
At one time we used to set the maximum number of scatter gather elements
on all Smart Array controllers to 32.  At some point in time the
firmware began to write the "appropriate" value for each controller into
the config table.  The cciss driver would then read that and set
h->maxsgentries.

        h->maxsgentries = readl(&(h->cfgtable->MaxSGElements);

On the P600 that value is 544.  Under some workloads a significant
performance reduction may result.  This patch forces the P600 to use
only 32 scatter gather elements.  Other controllers are not affected.

Signed-off-by: Mike Miller <mike.miller@hp.com>
Signed-off-by: Dwight (Bud) Brown <bubrown@redhat.com>
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Acked-by: Stephen M. Cameron <steve.cameron@hp.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:59 -07:00
Jingoo Han
c86db975c8 drivers/block/mg_disk.c: make mg_times_out() static
mg_times_out() is used only in this file.  Fix the following sparse
warning:

  drivers/block/mg_disk.c:639:6: warning: symbol 'mg_times_out' was not declared. Should it be static?

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:59 -07:00
Cai Zhiyong
bab55417b1 block: support embedded device command line partition
Read block device partition table from command line.  The partition used
for fixed block device (eMMC) embedded device.  It is no MBR, save
storage space.  Bootloader can be easily accessed by absolute address of
data on the block device.  Users can easily change the partition.

This code reference MTD partition, source "drivers/mtd/cmdlinepart.c"
About the partition verbose reference
"Documentation/block/cmdline-partition.txt"

[akpm@linux-foundation.org: fix printk text]
[yongjun_wei@trendmicro.com.cn: fix error return code in parse_parts()]
Signed-off-by: Cai Zhiyong <caizhiyong@huawei.com>
Cc: Karel Zak <kzak@redhat.com>
Cc: "Wanglin (Albert)" <albert.wanglin@huawei.com>
Cc: Marius Groeger <mag@sysgo.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Artem Bityutskiy <dedekind@infradead.org>
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:57 -07:00
Jingoo Han
ed751e683c block/blk-sysfs.c: replace strict_strtoul() with kstrtoul()
The usage of strict_strtoul() is not preferred, because strict_strtoul()
is obsolete.  Thus, kstrtoul() should be used.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:56 -07:00
Jingoo Han
bb8e0e84b3 block: replace strict_strtoul() with kstrtoul()
The use of strict_strtoul() is not preferred, because strict_strtoul() is
obsolete.  Thus, kstrtoul() should be used.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:56 -07:00
Oleg Nesterov
e1403b8edf include/linux/sched.h: don't use task->pid/tgid in same_thread_group/has_group_leader_pid
task_struct->pid/tgid should go away.

1. Change same_thread_group() to use task->signal for comparison.

2. Change has_group_leader_pid(task) to compare task_pid(task) with
   signal->leader_pid.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Sergey Dyasly <dserrg@gmail.com>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:56 -07:00
Jie Liu
28e8be3180 ocfs2: fix the end cluster offset of FIEMAP
Call fiemap ioctl(2) with given start offset as well as an desired mapping
range should show extents if possible.  However, we somehow figure out the
end offset of mapping via 'mapping_end -= cpos' before iterating the
extent records which would cause problems if the given fiemap length is
too small to a cluster size, e.g,

Cluster size 4096:
debugfs.ocfs2 1.6.3
        Block Size Bits: 12   Cluster Size Bits: 12

The extended fiemap test utility From David:
https://gist.github.com/anonymous/6172331

# dd if=/dev/urandom of=/ocfs2/test_file bs=1M count=1000
# ./fiemap /ocfs2/test_file 4096 10
start: 4096, length: 10
File /ocfs2/test_file has 0 extents:
#	Logical          Physical         Length           Flags
	^^^^^ <-- No extent is shown

In this case, at ocfs2_fiemap(): cpos == mapping_end == 1. Hence the
loop of searching extent records was not executed at all.

This patch remove the in question 'mapping_end -= cpos', and loops
until the cpos is larger than the mapping_end as usual.

# ./fiemap /ocfs2/test_file 4096 10
start: 4096, length: 10
File /ocfs2/test_file has 1 extents:
#	Logical          Physical         Length           Flags
0:	0000000000000000 0000000056a01000 0000000006a00000 0000

Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Reported-by: David Weber <wb@munzinger.de>
Tested-by: David Weber <wb@munzinger.de>
Cc: Sunil Mushran <sunil.mushran@gmail.com>
Cc: Mark Fashen <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:53 -07:00
Joseph Qi
a72e27d372 ocfs2: remove unused variable ip in dlmfs_get_root_inode()
Variable ip in dlmfs_get_root_inode() is defined but not used.  So clean
it up.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:52 -07:00
Joyce
6f8648e894 ocfs2: fix a tiny race case when firing callbacks
In o2hb_shutdown_slot() and o2hb_check_slot(), since event is defined as
local, it is only valid during the call stack.  So the following tiny race
case may happen in a multi-volumes mounted environment:

o2hb-vol1                         o2hb-vol2
1) o2hb_shutdown_slot
allocate local event1
2) queue_node_event
add event1 to global o2hb_node_events
                                  3) o2hb_shutdown_slot
                                  allocate local event2
                                  4) queue_node_event
                                  add event2 to global o2hb_node_events
                                  5) o2hb_run_event_list
                                  delete event1 from o2hb_node_events
6) o2hb_run_event_list
event1 empty, return
7) o2hb_shutdown_slot
event1 lifecycle ends
                                  8) o2hb_fire_callbacks
                                  event1 is already *invalid*

This patch lets it wait on o2hb_callback_sem when another thread is firing
callbacks.  And for performance consideration, we only call
o2hb_run_event_list when there is an event queued.

Signed-off-by: Joyce <xuejiufei@huawei.com>
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:51 -07:00
Joseph Qi
03dbe88aa9 ocfs2: avoid possible NULL pointer dereference in o2net_accept_one()
Since o2nm_get_node_by_num() may return NULL, we add this check in
o2net_accept_one() to avoid possible NULL pointer dereference.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:50 -07:00
Joseph Qi
9a239e4c68 ocfs2: adjust code style for o2net_handler_tree_lookup()
Code in o2net_handler_tree_lookup() may be corrupted by mistake.  So
adjust it to promote readability.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:50 -07:00
Younger Liu
7aebff18b9 ocfs2: free path in ocfs2_remove_inode_range()
In ocfs2_remove_inode_range(), there is a memory leak.  The variable path
has allocated memory with ocfs2_new_path_from_et(), but it is not free.

Signed-off-by: Younger Liu <younger.liu@huawei.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:50 -07:00
Joseph Qi
6cae6d3189 ocfs2: fix possible double free in ocfs2_reflink_xattr_rec
In ocfs2_reflink_xattr_rec(), meta_ac and data_ac are allocated by calling
ocfs2_lock_reflink_xattr_rec_allocators().

Once an error occurs when allocating *data_ac, it frees *meta_ac which is
allocated before.  Here it mistakenly sets meta_ac to NULL but *meta_ac.
Then ocfs2_reflink_xattr_rec() will try to free meta_ac again which is
already invalid.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:49 -07:00
Xue jiufei
69b2bd16d9 ocfs2/dlm: force clean refmap when doing local cleanup
dlm_do_local_recovery_cleanup() should force clean refmap if the owner of
lockres is UNKNOWN.  Otherwise node may hang when umounting filesystems.
Here's the situation:

	Node1                                    Node2
dlmlock()
  -> dlm_get_lock_resource()
send DLM_MASTER_REQUEST_MSG to
other nodes.

                                       trying to master this lockres,
                                       return MAYBE.

selected as the master of lockresA,
set mle->master to Node1,
and do assert_master,
send DLM_ASSERT_MASTER_MSG to Node2.
                                       Node 2 has interest on lockresA
                                       and return
                                       DLM_ASSERT_RESPONSE_MASTERY_REF
                                       then something happened and
                                       Node2 crashed.

Receiving DLM_ASSERT_RESPONSE_MASTERY_REF, set Node2 into refmap, and keep
sending DLM_ASSERT_MASTER_MSG to other nodes

o2hb found node2 down, calling dlm_hb_node_down() -->
dlm_do_local_recovery_cleanup() the master of lockresA is still UNKNOWN,
no need to call dlm_free_dead_locks().

Set the master of lockresA to Node1, but Node2 stills remains in refmap.

When Node1 umount, it found that the refmap of lockresA is not empty and
attempted to migrate it to Node2, But Node2 is already down, so umount
hang, trying to migrate lockresA again and again.

Signed-off-by: joyce <xuejiufei@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:49 -07:00
Younger Liu
6ea437a363 ocfs2: free meta_ac and data_ac when ocfs2_start_trans fails in ocfs2_xattr_set()
In ocfs2_xattr_set(), if ocfs2_start_trans failed, meta_ac and data_ac
should be free.  Otherwise, It would lead to a memory leak.

Signed-off-by: Younger Liu <younger.liu@huawei.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:47 -07:00
Joseph Qi
17caf9555e ocfs2: add the missing return value check of ocfs2_xattr_get_clusters
In ocfs2_xattr_value_attach_refcount(), if error occurs when calling
ocfs2_xattr_get_clusters(), it will go with unexpected behavior since
local variables p_cluster, num_clusters and ext_flags are declared without
initialization.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Acked-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:45 -07:00
Jie Liu
4704aa30fc ocfs2: fix a memory leak in __ocfs2_move_extents()
The ocfs2 path is not properly freed which leads to a memory leak at
__ocfs2_move_extents().

This patch stops the leaks of the ocfs2_path structure.

Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Reviewed-by: Younger Liu <younger.liu@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:44 -07:00
Joseph Qi
2b0f6eae2d ocfs2: add missing return value check of ocfs2_get_clusters()
In ocfs2_attach_refcount_tree() and ocfs2_duplicate_extent_list(), if
error occurs when calling ocfs2_get_clusters(), it will go with
unexpected behavior as local variables p_cluster, num_clusters and
ext_flags are declared without initialization.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Jie Liu <jeff.liu@oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:44 -07:00
Joseph Qi
3d94ea51c1 ocfs2: clean up dead code in ocfs2_acl_from_xattr()
In ocfs2_acl_from_xattr(), if size is less than sizeof(struct
posix_acl_entry), it returns ERR_PTR(-EINVAL) directly.  Then assign (size
/ sizeof(struct posix_acl_entry)) to count which will be at least 1, that
means the following branch (count < 0) and (count == 0) will never be
true.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Acked-by: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:39 -07:00
Dong Fang
df53cd3b70 ocfs2: use list_for_each_entry() instead of list_for_each()
[dan.carpenter@oracle.com: fix up some NULL dereference bugs]
Signed-off-by: Dong Fang <yp.fangdong@gmail.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jeff Liu <jeff.liu@oracle.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:36 -07:00
Sunil Mushran
8dd7903e48 fs/ocfs2/cluster/tcp.c: fix possible null pointer dereferences
Fix some possible null pointer dereferences that were detected by the
static code analyser, smatch.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Reported-by: Guozhonghua <guozhonghua@h3c.com>
Cc: Sunil Mushran <sunil.mushran@gmail.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:34 -07:00
Younger Liu
7e9b793707 ocfs2: ac_bits_wanted should be local_alloc_bits when returns -ENOSPC
There is an issue in reserving and claiming space for localalloc, When
localalloc space is not enough, it would claim space from global_bitmap.
And if there is not enough free space in global_bitmap, the size of
claiming space would set to half of orignal size and retry.

The issue is as follows: osb->local_alloc_bits is set to half of orignal
size in ocfs2_recalc_la_window(), but ac->ac_bits_wanted is set to
osb->local_alloc_default_bits which is not changed.  localalloc always
reserves and claims local_alloc_default_bits space and returns ENOSPC.

So, ac->ac_bits_wanted should be osb->local_alloc_bits which would be
changed.

Signed-off-by: Younger Liu <younger.liu@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Jeff Liu <jeff.liu@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:31 -07:00
Xue jiufei
98ac9125c5 ocfs2: dlm_request_all_locks() should deal with the status sent from target node
dlm_request_all_locks() should deal with the status sent from target node
if DLM_LOCK_REQUEST_MSG is sent successfully, or recovery master will fall
into endless loop, waiting for other nodes to send locks and
DLM_RECO_DATA_DONE_MSG to me.

        NodeA                                  NodeB
                                     selected as recovery master
                                     dlm_remaster_locks()
                                     ->dlm_request_all_locks()
                                     send DLM_LOCK_REQUEST_MSG to nodeA

It happened that NodeA cannot alloc memory when it processes this
message.  dlm_request_all_locks_handler() do not queue
dlm_request_all_locks_worker and returns -ENOMEM.  It will never send
locks and DLM_RECO_DATA_DONE_MSG to NodeB.

                                    NodeB do not deal with the status
                                    sent from nodeA, and will fall in
                                    endless loop waiting for the
                                    recovery state of NodeA to be
                                    changed.

Signed-off-by: joyce <xuejiufei@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Jeff Liu <jeff.liu@oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:31 -07:00
Junxiao Bi
f17c20dd2e ocfs2: use i_size_read() to access i_size
Though ocfs2 uses inode->i_mutex to protect i_size, there are both
i_size_read/write() and direct accesses.  Clean up all direct access to
eliminate confusion.

Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Jie Liu <jeff.liu@oracle.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:30 -07:00
Younger Liu
2b1e55c389 ocfs2: lighten up allocate transaction
The issue scenario is as following:

When fallocating a very large disk space for a small file,
__ocfs2_extend_allocation attempts to get a very large transaction.  For
some journal sizes, there may be not enough room for this transaction,
and the fallocate will fail.

The patch below extends & restarts the transaction as necessary while
allocating space, and should work with even the smallest journal.  This
patch refers ext4 resize.

Test:
# mkfs.ocfs2 -b 4K -C 32K -T datafiles /dev/sdc
...(jounral size is 32M)
# mount.ocfs2 /dev/sdc /mnt/ocfs2/
# touch /mnt/ocfs2/1.log
# fallocate -o 0 -l 400G /mnt/ocfs2/1.log
fallocate: /mnt/ocfs2/1.log: fallocate failed: Cannot allocate memory
# tail -f /var/log/messages
[ 7372.278591] JBD: fallocate wants too many credits (2051 > 2048)
[ 7372.278597] (fallocate,6438,0):__ocfs2_extend_allocation:709 ERROR: status = -12
[ 7372.278603] (fallocate,6438,0):ocfs2_allocate_unwritten_extents:1504 ERROR: status = -12
[ 7372.278607] (fallocate,6438,0):__ocfs2_change_file_space:1955 ERROR: status = -12
^C
With this patch, the test works well.

Signed-off-by: Younger Liu <younger.liu@huawei.com>
Cc: Jie Liu <jeff.liu@oracle.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:28 -07:00
Jingoo Han
5e42781caf drivers/iommu: remove unnecessary platform_set_drvdata()
The driver core clears the driver data to NULL after device_release or
on probe failure.  Thus, it is not needed to manually clear the device
driver data to NULL.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: David Brown <davidb@codeaurora.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Suman Anna <s-anna@ti.com>
Acked-by: Libo Chen <libo.chen@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:24 -07:00
Paul Bolle
ffd29195ed drivers/video/acornfb.c: remove dead code
acornfb checks for HAS_VIDC while support for that macro was removed in
v2.6.23 (when the arm26 port was removed).  So we can remove a bit of
dead code.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:22 -07:00
Oleg Nesterov
40a0d32d1e fork: unify and tighten up CLONE_NEWUSER/CLONE_NEWPID checks
do_fork() denies CLONE_THREAD | CLONE_PARENT if NEWUSER | NEWPID.

Then later copy_process() denies CLONE_SIGHAND if the new process will
be in a different pid namespace (task_active_pid_ns() doesn't match
current->nsproxy->pid_ns).

This looks confusing and inconsistent.  CLONE_NEWPID is very similar to
the case when ->pid_ns was already unshared, we want the same
restrictions so copy_process() should also nack CLONE_PARENT.

And it would be better to deny CLONE_NEWUSER && CLONE_SIGHAND as well
just for consistency.

Kill the "CLONE_NEWUSER | CLONE_NEWPID" check in do_fork() and change
copy_process() to do the same check along with ->pid_ns check we already
have.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Colin Walters <walters@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:20 -07:00
Oleg Nesterov
5167246a8a pidns: kill the unnecessary CLONE_NEWPID in copy_process()
Commit 8382fcac1b ("pidns: Outlaw thread creation after
unshare(CLONE_NEWPID)") nacks CLONE_NEWPID if the forking process
unshared pid_ns.  This is correct but unnecessary, copy_pid_ns() does
the same check.

Remove the CLONE_NEWPID check to cleanup the code and prepare for the
next change.

Test-case:

	static int child(void *arg)
	{
		return 0;
	}

	static char stack[16 * 1024];

	int main(void)
	{
		pid_t pid;

		assert(unshare(CLONE_NEWUSER | CLONE_NEWPID) == 0);

		pid = clone(child, stack + sizeof(stack) / 2,
				CLONE_NEWPID | SIGCHLD, NULL);
		assert(pid < 0 && errno == EINVAL);

		return 0;
	}

clone(CLONE_NEWPID) correctly fails with or without this change.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Colin Walters <walters@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:19 -07:00
Oleg Nesterov
e79f525e99 pidns: fix vfork() after unshare(CLONE_NEWPID)
Commit 8382fcac1b ("pidns: Outlaw thread creation after
unshare(CLONE_NEWPID)") nacks CLONE_VM if the forking process unshared
pid_ns, this obviously breaks vfork:

	int main(void)
	{
		assert(unshare(CLONE_NEWUSER | CLONE_NEWPID) == 0);
		assert(vfork() >= 0);
		_exit(0);
		return 0;
	}

fails without this patch.

Change this check to use CLONE_SIGHAND instead.  This also forbids
CLONE_THREAD automatically, and this is what the comment implies.

We could probably even drop CLONE_SIGHAND and use CLONE_THREAD, but it
would be safer to not do this.  The current check denies CLONE_SIGHAND
implicitely and there is no reason to change this.

Eric said "CLONE_SIGHAND is fine.  CLONE_THREAD would be even better.
Having shared signal handling between two different pid namespaces is
the case that we are fundamentally guarding against."

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Colin Walters <walters@redhat.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:19 -07:00
Andrew Morton
3b8967d713 include/linux/smp.h:on_each_cpu(): switch back to a C function
Revert commit c846ef7deb ("include/linux/smp.h:on_each_cpu(): switch
back to a macro").  It turns out that the problematic linux/irqflags.h
include was fixed within ia64 and mn10300.

Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: David Daney <david.daney@cavium.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-11 15:56:19 -07:00
Linus Torvalds
e831cbfc1a Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull more s390 updates from Heiko Carstens:
 "This includes one bpf/jit bug fix where the jit compiler could
  sometimes write generated code out of bounds of the allocated memory
  area.

  The rest of the patches are only cleanups and minor improvements"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/irq: reduce size of external interrupt handler hash array
  s390/compat,uid16: use current_cred()
  s390/ap_bus: use and-mask instead of a cast
  s390/ftrace: avoid pointer arithmetics with function pointers
  s390: make various functions static, add declarations to header files
  s390/compat signal: add couple of __force annotations
  s390/mm: add __releases()/__acquires() annotations to gmap_alloc_table()
  s390: keep Kconfig sorted
  s390/irq: rework irq subclass handling
  s390/irq: use hlists for external interrupt handler array
  s390/dumpstack: convert print_symbol to %pSR
  s390/perf: Remove print_hex_dump_bytes() debug output
  s390: update defconfig
  s390/bpf,jit: fix address randomization
2013-09-11 08:36:03 -07:00
Linus Torvalds
5b4197845a Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kconfig updates from Michal Marek:
 "This is the kconfig part of kbuild for v3.12-rc1:
   - post-3.11 search code fixes and micro-optimizations
   - CONFIG_MODULES is no longer a special case; this is needed to
     eventually fix the bug that using KCONFIG_ALLCONFIG breaks
     allmodconfig
   - long long is used to store hex and int values
   - make silentoldconfig no longer warns when a symbol changes from
     tristate to bool (it's a job for make oldconfig)
   - scripts/diffconfig updated to work with newer Pythons
   - scripts/config does not rely on GNU sed extensions"

* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kconfig: do not allow more than one symbol to have 'option modules'
  kconfig: regenerate bison parser
  kconfig: do not special-case 'MODULES' symbol
  diffconfig: Update script to support python versions 2.5 through 3.3
  diffconfig: Gracefully exit if the default config files are not present
  modules: do not depend on kconfig to set 'modules' option to symbol MODULES
  kconfig: silence warning when parsing auto.conf when a symbol has changed type
  scripts/config: use sed's POSIX interface
  kconfig: switch to "long long" for sanity
  kconfig: simplify symbol-search code
  kconfig: don't allocate n+1 elements in temporary array
  kconfig: minor style fixes in symbol-search code
  kconfig/[mn]conf: shorten title in search-box
  kconfig: avoid multiple calls to strlen
  Documentation/kconfig: more concise and straightforward search explanation
2013-09-11 08:34:25 -07:00
Linus Torvalds
a22a0fdba4 New drivers:
- APM X-Gene system reboot driver by Feng Kan and Loc Ho (APM).
 
 - Qualcomm MSM reboot/poweroff driver by Abhimanyu Kapur (Codeaurora).
 
 - Texas Instruments BQ24190 charger driver by Mark A. Greer (Animal Creek
   Technologies).
 
 - Texas Instruments TWL4030 MADC battery driver by Lukas Märdian and Marek
   Belisko (Golden Delicious Computers). The driver is used on Freerunner
   GTA04 phones.
 
 Highlighted fixes and improvements:
 
 - Suspend/wakeup logic improvements: power supply objects will block
   system suspend until all power supply events are processed. Thanks to
   Zoran Markovic (Linaro), Arve Hjonnevag and Todd Poynor (Google).
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Merge tag 'for-v3.12' of git://git.infradead.org/battery-2.6

Pull battery/power supply driver updates from Anton Vorontsov:
 "New drivers:

   - APM X-Gene system reboot driver by Feng Kan and Loc Ho (APM).

   - Qualcomm MSM reboot/poweroff driver by Abhimanyu Kapur (Codeaurora).

   - Texas Instruments BQ24190 charger driver by Mark A.  Greer (Animal
     Creek Technologies).

   - Texas Instruments TWL4030 MADC battery driver by Lukas Märdian and
     Marek Belisko (Golden Delicious Computers).  The driver is used on
     Freerunner GTA04 phones.

  Highlighted fixes and improvements:

   - Suspend/wakeup logic improvements: power supply objects will block
     system suspend until all power supply events are processed.  Thanks
     to Zoran Markovic (Linaro), Arve Hjonnevag and Todd Poynor (Google)"

* tag 'for-v3.12' of git://git.infradead.org/battery-2.6:
  rx51_battery: Fix channel number when reading adc value
  power: Add twl4030_madc battery driver.
  bq24190_charger: Workaround SS definition problem on i386 builds
  power_supply: Prevent suspend until power supply events are processed
  vexpress-poweroff: Should depend on the required infrastructure
  twl4030-charger: Fix compiler warning with regulator_enable()
  rx51_battery: Replace hardcoded channels values.
  bq24190_charger: Add support for TI BQ24190 Battery Charger
  ab8500-charger: We print an unintended error message
  max8925_power: Fix missing of_node_put
  power_supply: Replace strict_strtol() with kstrtol()
  power: Add APM X-Gene system reboot driver
  power_supply: tosa_battery: Get rid of irq_to_gpio usage
  power supply: collie_battery: Convert to use dev_pm_ops
  power_supply: Make goldfish_battery depend on GOLDFISH || COMPILE_TEST
  power: reset: Add msm restart support
  MAINTAINERS: drivers/power: add entry for SmartReflex AVS drivers
2013-09-10 22:58:14 -07:00
Linus Torvalds
bf83e61464 Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc fixes from Ben Herrenschmidt:
 "Here are a handful of small powerpc fixes.

  A couple of section mismatches (always worth fixing), a missing export
  of a new symbol causing build failures of modules, a page fault
  deadlock fix (interestingly that bug has been around for a LONG time,
  though it seems to be more easily triggered by KVM) and fixing pseries
  default idle loop in the absence of the cpuidle drivers (such as
  during boot)"

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  powerpc: Default arch idle could cede processor on pseries
  fbdev/ps3fb: Fix section mismatch warning for ps3fb_probe
  powerpc: Fix section mismatch warning for prom_rtas_call
  powerpc: Fix possible deadlock on page fault
  powerpc: Export cpu_to_chip_id() to fix build error
2013-09-10 20:24:39 -07:00
Linus Torvalds
a60d4b9874 Bug-fixes:
- Boot on ARM without using Xen unconditionally
  - On Xen ARM don't run cpuidle/cpufreq
  - Fix regression in balloon driver, preempt count warnings
  - Fixes to make PVHVM able to use pv ticketlock.
  - Revert Xen PVHVM disabling pv ticketlock (aka, re-enable pv ticketlocks)
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Merge tag 'stable/for-linus-3.12-rc0-tag-two' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull Xen bug-fixes from Konrad Rzeszutek Wilk:
 "This pull I usually do after rc1 is out but because we have a nice
  amount of fixes, some bootup related fixes for ARM, and it is early in
  the cycle we figured to do it now to help with tracking of potential
  regressions.

  The simple ones are the ARM ones - one of the patches fell through the
  cracks, other fixes a bootup issue (unconditionally using Xen
  functions).  Then a fix for a regression causing preempt count being
  off (patch causing this went in v3.12).

  Lastly are the fixes to make Xen PVHVM guests use PV ticketlocks (Xen
  PV already does).

  The enablement of that was supposed to be part of the x86 spinlock
  merge in commit 816434ec4a ("The biggest change here are
  paravirtualized ticket spinlocks (PV spinlocks), which bring a nice
  speedup on various benchmarks...") but unfortunatly it would cause
  hang when booting Xen PVHVM guests.  Yours truly got all of the bugs
  fixed last week and they (six of them) are included in this pull.

  Bug-fixes:
   - Boot on ARM without using Xen unconditionally
   - On Xen ARM don't run cpuidle/cpufreq
   - Fix regression in balloon driver, preempt count warnings
   - Fixes to make PVHVM able to use pv ticketlock.
   - Revert Xen PVHVM disabling pv ticketlock (aka, re-enable pv ticketlocks)"

* tag 'stable/for-linus-3.12-rc0-tag-two' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/spinlock: Don't use __initdate for xen_pv_spin
  Revert "xen/spinlock: Disable IRQ spinlock (PV) allocation on PVHVM"
  xen/spinlock: Don't setup xen spinlock IPI kicker if disabled.
  xen/smp: Update pv_lock_ops functions before alternative code starts under PVHVM
  xen/spinlock: We don't need the old structure anymore
  xen/spinlock: Fix locking path engaging too soon under PVHVM.
  xen/arm: disable cpuidle and cpufreq when linux is running as dom0
  xen/p2m: Don't call get_balloon_scratch_page() twice, keep interrupts disabled for multicalls
  ARM: xen: only set pm function ptrs for Xen guests
2013-09-10 20:07:04 -07:00
Linus Torvalds
fa1586a7e4 Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
 "Daniel had some fixes queued up, that were delayed, the stolen memory
  ones and vga arbiter ones are quite useful, along with his usual bunch
  of stuff, nothing for HSW outputs yet.

  The one nouveau fix is for a regression I caused with the poweroff stuff"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (30 commits)
  drm/nouveau: fix oops on runtime suspend/resume
  drm/i915: Delay disabling of VGA memory until vgacon->fbcon handoff is done
  drm/i915: try not to lose backlight CBLV precision
  drm/i915: Confine page flips to BCS on Valleyview
  drm/i915: Skip stolen region initialisation if none is reserved
  drm/i915: fix gpu hang vs. flip stall deadlocks
  drm/i915: Hold an object reference whilst we shrink it
  drm/i915: fix i9xx_crtc_clock_get for multiplied pixels
  drm/i915: handle sdvo input pixel multiplier correctly again
  drm/i915: fix hpd work vs. flush_work in the pageflip code deadlock
  drm/i915: fix up the relocate_entry refactoring
  drm/i915: Fix pipe config warnings when dealing with LVDS fixed mode
  drm/i915: Don't call sg_free_table() if sg_alloc_table() fails
  i915: Update VGA arbiter support for newer devices
  vgaarb: Fix VGA decodes changes
  vgaarb: Don't disable resources that are not owned
  drm/i915: Pin pages whilst mapping the dma-buf
  drm/i915: enable trickle feed on Haswell
  x86: add early quirk for reserving Intel graphics stolen memory v5
  drm/i915: split PCI IDs out into i915_drm.h v4
  ...
2013-09-10 20:05:57 -07:00
Linus Torvalds
cf596766fc Merge branch 'nfsd-next' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
 "This was a very quiet cycle! Just a few bugfixes and some cleanup"

* 'nfsd-next' of git://linux-nfs.org/~bfields/linux:
  rpc: let xdr layer allocate gssproxy receieve pages
  rpc: fix huge kmalloc's in gss-proxy
  rpc: comment on linux_cred encoding, treat all as unsigned
  rpc: clean up decoding of gssproxy linux creds
  svcrpc: remove unused rq_resused
  nfsd4: nfsd4_create_clid_dir prints uninitialized data
  nfsd4: fix leak of inode reference on delegation failure
  Revert "nfsd: nfs4_file_get_access: need to be more careful with O_RDWR"
  sunrpc: prepare NFS for 2038
  nfsd4: fix setlease error return
  nfsd: nfs4_file_get_access: need to be more careful with O_RDWR
2013-09-10 20:04:59 -07:00
Linus Torvalds
516f7b3f2a Minor cleanup in ina2xx and hwmon-vid drivers; no functional changes
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Merge tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon cleanups from Guenter Roeck:
 "Minor cleanup in ina2xx and hwmon-vid drivers; no functional changes"

* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (ina2xx) Remove casting the return value which is a void pointer
  hwmon: (hwmon-vid) Add __maybe_unused attribute to dummy variable
2013-09-10 20:03:54 -07:00
Linus Torvalds
442e0973e9 Merge branch 'x86/jumplabel' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 jumplabel changes from Peter Anvin:
 "One more x86 tree for this merge window.  This tree improves the
  handling of jump labels, so that most of the time we don't have to do
  a massive initial patching run.

  Furthermore, we will error out of the jump label is not what is
  expected, eg if it has been corrupted or tampered with"

* 'x86/jumplabel' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/jump-label: Show where and what was wrong on errors
  x86/jump-label: Add safety checks to jump label conversions
  x86/jump-label: Do not bother updating nops if they are correct
  x86/jump-label: Use best default nops for inital jump label calls
2013-09-10 19:43:23 -07:00
Vaidyanathan Srinivasan
363edbe261 powerpc: Default arch idle could cede processor on pseries
When adding cpuidle support to pSeries, we introduced two
regressions:

  - The new cpuidle backend driver only works under hypervisors
    supporting the "SLPLAR" option, which isn't the case of the
    old POWER4 hypervisor and the HV "light" used on js2x blades

  - The cpuidle driver registers fairly late, meaning that for
    a significant portion of the boot process, we end up having
    all threads spinning. This slows down the boot process and
    increases the overall resource usage if the hypervisor has
    shared processors.

This fixes both by implementing a "default" idle that will cede
to the hypervisor when possible, in a very simple way without
all the bells and whisles of cpuidle.

Reported-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Acked-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org>
2013-09-11 11:41:54 +10:00
Vladimir Murzin
88c2d0b6fa fbdev/ps3fb: Fix section mismatch warning for ps3fb_probe
While cross-building for PPC64 I've got

WARNING: drivers/video/built-in.o(.text+0x9f9ca): Section mismatch in
reference from the function .ps3fb_probe() to th e variable
.init.data:ps3fb_fix The function .ps3fb_probe() references the
variable __initdata ps3fb_fix.  This is often because .ps3fb_probe
lacks a __initdata annotation or the annotation of ps3fb_fix is wrong.

WARNING: drivers/video/built-in.o(.text+0x9f9d2): Section mismatch in
reference from the function .ps3fb_probe() to the variable
.init.data:ps3fb_fix The function .ps3fb_probe() references the
variable __initdata ps3fb_fix.  This is often because .ps3fb_probe
lacks a __initdata annotation or the annotation of ps3fb_fix is wrong.

WARNING: drivers/built-in.o(.text+0xe222a): Section mismatch in
reference from the function .ps3fb_probe() to the variable
.init.data:ps3fb_fix The function .ps3fb_probe() references the
variable __initdata ps3fb_fix.  This is often because .ps3fb_probe
lacks a __initdata annotation or the annotation of ps3fb_fix is wrong.

WARNING: drivers/built-in.o(.text+0xe2232): Section mismatch in
reference from the function .ps3fb_probe() to the variable
.init.data:ps3fb_fix The function .ps3fb_probe() references the
variable __initdata ps3fb_fix.  This is often because .ps3fb_probe
lacks a __initdata annotation or the annotation of ps3fb_fix is wrong.

WARNING: vmlinux.o(.text+0x561d4a): Section mismatch in reference from
the function .ps3fb_probe() to the variable .init.data:ps3fb_fix The
function .ps3fb_probe() references the variable __initdata ps3fb_fix.
This is often because .ps3fb_probe lacks a __initdata annotation or
the annotation of ps3fb_fix is wrong.

Mismatch was introduced with 48c68c4f "Drivers: video: remove __dev*
attributes."

Remove __init data annotation from ps3fb_fix.

Signed-off-by: Vladimir Murzin <murzin.v@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-09-11 11:39:39 +10:00
Vladimir Murzin
620e505082 powerpc: Fix section mismatch warning for prom_rtas_call
While cross-building for PPC64 I've got

WARNING: vmlinux.o(.text.unlikely+0x1ba): Section mismatch in
reference from the function .prom_rtas_call() to the variable
.init.data:dt_string_start The function .prom_rtas_call() references
the variable __initdata dt_string_start.  This is often because
.prom_rtas_call lacks a __initdata annotation or the annotation of
dt_string_start is wrong.

WARNING: vmlinux.o(.meminit.text+0xeb0): Section mismatch in reference
from the function .free_area_init_core.isra.47() to the function
.init.text:.set_pageblock_order() The function __meminit
.free_area_init_core.isra.47() references a function __init
.set_pageblock_order().  If .set_pageblock_order is only used by
.free_area_init_core.isra.47 then annotate .set_pageblock_order with a
matching annotation.

Fix it by proper annotation of prom_rtas_call.

Signed-off-by: Vladimir Murzin <murzin.v@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-09-11 11:39:38 +10:00
Aneesh Kumar K.V
69e044dd75 powerpc: Fix possible deadlock on page fault
stack_grow_into/14082 is trying to acquire lock:
  (&mm->mmap_sem){++++++}, at: [<c000000000206d28>] .might_fault+0x78/0xe0

 but task is already holding lock:
  (&mm->mmap_sem){++++++}, at: [<c0000000007ffd8c>] .do_page_fault+0x24c/0x910

 other info that might help us debug this:
  Possible unsafe locking scenario:

        CPU0
        ----
   lock(&mm->mmap_sem);
   lock(&mm->mmap_sem);

  *** DEADLOCK ***

  May be due to missing lock nesting notation

 1 lock held by stack_grow_into/14082:
  #0:  (&mm->mmap_sem){++++++}, at: [<c0000000007ffd8c>] .do_page_fault+0x24c/0x910

 stack backtrace:
 CPU: 21 PID: 14082 Comm: stack_grow_into Not tainted 3.10.0-10.el7.ppc64.debug #1
 Call Trace:
 [c0000003d396b850] [c000000000016e7c] .show_stack+0x7c/0x1f0 (unreliable)
 [c0000003d396b920] [c000000000813fc8] .dump_stack+0x28/0x3c
 [c0000003d396b990] [c000000000124b90] .__lock_acquire+0x1640/0x1800
 [c0000003d396bab0] [c00000000012570c] .lock_acquire+0xac/0x250
 [c0000003d396bb80] [c000000000206d54] .might_fault+0xa4/0xe0
 [c0000003d396bbf0] [c0000000007ffe2c] .do_page_fault+0x2ec/0x910
 [c0000003d396be30] [c0000000000092e8] handle_page_fault+0x10/0x30

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-09-11 11:39:37 +10:00
Guenter Roeck
256588fda1 powerpc: Export cpu_to_chip_id() to fix build error
powerpc allmodconfig build fails with:

ERROR: ".cpu_to_chip_id" [drivers/block/mtip32xx/mtip32xx.ko] undefined!

The problem was introduced with commit 15863ff3b (powerpc: Make chip-id
information available to userspace).

Export the missing symbol.

Cc: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Cc: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-09-11 11:39:37 +10:00
Linus Torvalds
8d7551eb19 CRIS changes for 3.12
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Merge tag 'cris-for-3.12' of git://jni.nu/cris

Pull CRIS updates from Jesper Nilsson:
 "Mostly cleanup and removal of unused configs"

* tag 'cris-for-3.12' of git://jni.nu/cris:
  CRIS: drop unused Kconfig symbols
  CRIS: Add kvm_para.h which includes generic file
  CRIS: remove unused current_regs
  CRIS: Remove last traces of legacy RTC drivers
  CRIS: remove "config OOM_REBOOT"
2013-09-10 14:55:16 -07:00
Akira Takeuchi
3da06ed736 mn10300: Fix crash just after starting userspace on !CONFIG_PREEMPT
The mn10300 kernel crashes just after starting userspace programs, if
CONFIG_PREEMPT is disabled:

  Freeing unused kernel memory: 96K (90286000 - 9029e000)
  MISALIGN: 97c33ff9: unsupported instruction f
  MISALIGN: 97c33ff9: unsupported instruction f
  MISALIGN: 97c33ff9: unsupported instruction f
  :

This fixes the problem that was introduced by commit d17fc238ac
("MN10300: Enable IRQs more in system call exit work path").

Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: Kiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-09-10 14:54:59 -07:00