| Commit message (Collapse) | Author | Age | Files | Lines |
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And all the SBUS dma interfaces are deleted.
A private implementation remains inside of the 32-bit sparc port which
exists only for the sake of the implementation of dma_*().
Signed-off-by: David S. Miller <davem@davemloft.net>
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These dispatch to either PCI or SBUS routines based upon
the device bus type.
This will allow us to let SBUS drivers call these routines.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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This is the first step in converting all the SBUS drivers
over to generic dma_*().
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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And stick the iommu archdata pointer into the generic OF device tree
of_device struct as well.
We still have to pass the sbus_bus object down into the routines so
that the SBUS bus objects get the iommu cookies set properly. After
drivers get converted to being pure OF drivers, that can go away.
Signed-off-by: David S. Miller <davem@davemloft.net>
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This thing was completely pointless.
Just find the OF device in the parent of drivers that want to program
this device, and map the DMA regs inside such drivers too.
This also moves the dummy claim_dma_lock() and release_dma_lock()
implementation to floppy_32.h, which makes it handle this issue
just like floppy_64.h does.
Signed-off-by: David S. Miller <davem@davemloft.net>
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This has been marked BROKEN for a long time and it's more likely
to get rewritten from scratch than to be fixed up and made usable.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Stephen Rothwell noticed that I committed an earlier version
of the patch that didn't have two things fixed:
1) irq_of_parse_and_map() should return "unsigned int" not "int"
and it should return zero for "no irq"
2) irq_dispose_mapping() should be an inline function, not a macro,
for type checking
With feedback and suggestions from Anton Vorontsov.
Signed-off-by: David S. Miller <davem@davemloft.net>
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This also allows arch/sparc64/kernel/pci.c to be properly CONFIG_PCI
conditional compiled in the Makefile.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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The way to do this varies by platform type and the exact memory
controller the cpu uses.
For Spitfire cpus we currently just use prom_getunumber() and hope
that works.
For Cheetah cpus we have a memory controller driver that can
compute this information.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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This is a PIC16F747 based controller that monitors and consolidates
the hardware access to various fan and temperature values reported by
adr7462 and similar devices behind an I2C bus.
Signed-off-by: David S. Miller <davem@davemloft.net>
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sys32_pause() is identical to the generically provided
sys_pause() in kernel/signal.c
Noticed by Christoph Hellwig.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Christoph Hellwig noticed that having both entry and exit
logic in one function no longer makes sense, and having
seperate ones simplifies things a lot.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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This allows more OF layer code to be shared between powerpc and
sparc.
Signed-off-by: David S. Miller <davem@davemloft.net>
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On some platforms, the I2C controller is shared between the OS and
OBP. OBP uses this I2C controller to access the EEPROM, and thus is
programmed when the kernel calls prom_setprop().
Wrap such calls with the new of_set_property_mutex.
Relevant I2C bus drivers can grab this mutex around top-level I2C
operations to provide the proper protection.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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The acer_wmi driver does a DMI scan for quirks, and then sets flags into the
"interface" datastructure for some cases. However, the quirks happen real early
before "interface" is per se initialized from NULL.
The patch below 1) adds a NULL pointer check and 2) (re)runs the quirks at the
end, when "interface" has it's final value.
Reported-by: kerneloops.org
Acked-by: Carlos Corbacho <carlos@strangeworlds.co.uk>
CC: stable@vger.kernel.org
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
ipv6: protocol for address routes
icmp: icmp_sk() should not use smp_processor_id() in preemptible code
pkt_sched: Fix qdisc list locking
pkt_sched: Fix qdisc_watchdog() vs. dev_deactivate() race
sctp: fix potential panics in the SCTP-AUTH API.
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This fixes a problem spotted with zebra, but not sure if it is
necessary a kernel problem. With IPV6 when an address is added to an
interface, Zebra creates a duplicate RIB entry, one as a connected
route, and other as a kernel route.
When an address is added to an interface the RTN_NEWADDR message
causes Zebra to create a connected route. In IPV4 when an address is
added to an interface a RTN_NEWROUTE message is set to user space with
the protocol RTPROT_KERNEL. Zebra ignores these messages, because it
already has the connected route.
The problem is that route created in IPV6 has route protocol ==
RTPROT_BOOT. Was this a design decision or a bug? This fixes it. Same
patch applies to both net-2.6 and stable.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass namespace into icmp_xmit_lock, obtain socket inside and return
it as a result for caller.
Thanks Alexey Dobryan for this report:
Steps to reproduce:
CONFIG_PREEMPT=y
CONFIG_DEBUG_PREEMPT=y
tracepath <something>
BUG: using smp_processor_id() in preemptible [00000000] code: tracepath/3205
caller is icmp_sk+0x15/0x30
Pid: 3205, comm: tracepath Not tainted 2.6.27-rc4 #1
Call Trace:
[<ffffffff8031af14>] debug_smp_processor_id+0xe4/0xf0
[<ffffffff80409405>] icmp_sk+0x15/0x30
[<ffffffff8040a17b>] icmp_send+0x4b/0x3f0
[<ffffffff8025a415>] ? trace_hardirqs_on_caller+0xd5/0x160
[<ffffffff8025a4ad>] ? trace_hardirqs_on+0xd/0x10
[<ffffffff8023a475>] ? local_bh_enable_ip+0x95/0x110
[<ffffffff804285b9>] ? _spin_unlock_bh+0x39/0x40
[<ffffffff8025a26c>] ? mark_held_locks+0x4c/0x90
[<ffffffff8025a4ad>] ? trace_hardirqs_on+0xd/0x10
[<ffffffff8025a415>] ? trace_hardirqs_on_caller+0xd5/0x160
[<ffffffff803e91b4>] ip_fragment+0x8d4/0x900
[<ffffffff803e7030>] ? ip_finish_output2+0x0/0x290
[<ffffffff803e91e0>] ? ip_finish_output+0x0/0x60
[<ffffffff803e6650>] ? dst_output+0x0/0x10
[<ffffffff803e922c>] ip_finish_output+0x4c/0x60
[<ffffffff803e92e3>] ip_output+0xa3/0xf0
[<ffffffff803e68d0>] ip_local_out+0x20/0x30
[<ffffffff803e753f>] ip_push_pending_frames+0x27f/0x400
[<ffffffff80406313>] udp_push_pending_frames+0x233/0x3d0
[<ffffffff804067d1>] udp_sendmsg+0x321/0x6f0
[<ffffffff8040d155>] inet_sendmsg+0x45/0x80
[<ffffffff803b967f>] sock_sendmsg+0xdf/0x110
[<ffffffff8024a100>] ? autoremove_wake_function+0x0/0x40
[<ffffffff80257ce5>] ? validate_chain+0x415/0x1010
[<ffffffff8027dc10>] ? __do_fault+0x140/0x450
[<ffffffff802597d0>] ? __lock_acquire+0x260/0x590
[<ffffffff803b9e55>] ? sockfd_lookup_light+0x45/0x80
[<ffffffff803ba50a>] sys_sendto+0xea/0x120
[<ffffffff80428e42>] ? _spin_unlock_irqrestore+0x42/0x80
[<ffffffff803134bc>] ? __up_read+0x4c/0xb0
[<ffffffff8024e0c6>] ? up_read+0x26/0x30
[<ffffffff8020b8bb>] system_call_fastpath+0x16/0x1b
icmp6_sk() is similar.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since some qdiscs call qdisc_tree_decrease_qlen() (so qdisc_lookup())
without rtnl_lock(), adding and deleting from a qdisc list needs
additional locking. This patch adds global spinlock qdisc_list_lock
and wrapper functions for modifying the list. It is considered as a
temporary solution until hfsc_dequeue(), netem_dequeue() and
tbf_dequeue() (or qdisc_tree_decrease_qlen()) are redone.
With feedback from Herbert Xu and David S. Miller.
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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dev_deactivate() can skip rescheduling of a qdisc by qdisc_watchdog()
or other timer calling netif_schedule() after dev_queue_deactivate().
We prevent this checking aliveness before scheduling the timer. Since
during deactivation the root qdisc is available only as qdisc_sleeping
additional accessor qdisc_root_sleeping() is created.
With feedback from Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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All of the SCTP-AUTH socket options could cause a panic
if the extension is disabled and the API is envoked.
Additionally, there were some additional assumptions that
certain pointers would always be valid which may not
always be the case.
This patch hardens the API and address all of the crash
scenarios.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch lets the files using linux/version.h match the files that
#include it.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: authenc - Avoid using clobbered request pointer
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Authenc works in two stages for encryption, it first encrypts and
then computes an ICV. The context memory of the request is used
by both operations. The problem is that when an asynchronous
encryption completes, we will compute the ICV and then reread the
context memory of the encryption to get the original request.
It just happens that we have a buffer of 16 bytes in front of the
request pointer, so ICVs of 16 bytes (such as SHA1) do not trigger
the bug. However, any attempt to uses a larger ICV instantly kills
the machine when the first asynchronous encryption is completed.
This patch fixes this by saving the request pointer before we start
the ICV computation.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: hda - Fix call of alc888_coef_init()
ALSA: hda_intel: enable snoop for nvidia HDA controller
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Using init_hook to call alc888_coef_init() is problematic for configurations
that already set another init_hook. Better to put it in alc_init() as is
(although it looks a bit hackish).
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Enable the snoop for nvidia hda controller to avoid data coherence issue.
Signed-off-by: Peer Chen <peerchen@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: Update documentation to remind users to update mke2fs.conf
ext4: Fix small file fragmentation
ext4: Initialize writeback_index to 0 when allocating a new inode
ext4: make sure ext4_has_free_blocks returns 0 for ENOSPC
ext4: journal credit fix for the delayed allocation's writepages() function
ext4: Rework the ext4_da_writepages() function
ext4: journal credits reservation fixes for DIO, fallocate
ext4: journal credits reservation fixes for extent file writepage
ext4: journal credits calulation cleanup and fix for non-extent writepage
ext4: Fix bug where we return ENOSPC even though we have plenty of inodes
ext4: don't try to resize if there are no reserved gdt blocks left
ext4: Use ext4_discard_reservations instead of mballoc-specific call
ext4: Fix ext4_dx_readdir hash collision handling
ext4: Fix delalloc release block reservation for truncate
ext4: Fix potential truncate BUG due to i_prealloc_list being non-empty
ext4: Handle unwritten extent properly with delayed allocation
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Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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For small file block allocations, mballoc uses per cpu prealloc
space. Use goal block when searching for the right prealloc
space. Also make sure ext4_da_writepages tries to write
all the pages for small files in single attempt
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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The write_cache_pages() function uses the mapping->writeback_index as
the starting index to write out when range_cyclic is set. Properly
initialize writeback_index so that we start the writeout at index 0.
This was found when debugging the small file fragmentation on ext4.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Fix ext4_has_free_blocks() to return 0 when we don't have enough space.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Previous delalloc writepages implementation started a new transaction
outside of a loop which called get_block() to do the block allocation.
Since we didn't know exactly how many blocks would need to be allocated,
the estimated journal credits required was very conservative and caused
many issues.
With the reworked delayed allocation, a new transaction is created for
each get_block(), thus we don't need to guess how many credits for the
multiple chunk of allocation. We start every transaction with enough
credits for inserting a single exent. When estimate the credits for
indirect blocks to allocate a chunk of blocks, we need to know the
number of data blocks to allocate. We use the total number of reserved
delalloc datablocks; if that is too big, for non-extent files, we need
to limit the number of blocks to EXT4_MAX_TRANS_BLOCKS.
Code cleanup from Aneesh.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Reviewed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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With the below changes we reserve credit needed to insert only one
extent resulting from a call to single get_block. This makes sure we
don't take too much journal credits during writeout. We also don't
limit the pages to write. That means we loop through the dirty pages
building largest possible contiguous block request. Then we issue a
single get_block request. We may get less block that we requested. If
so we would end up not mapping some of the buffer_heads. That means
those buffer_heads are still marked delay. Later in the writepage
callback via __mpage_writepage we redirty those pages.
We should also not limit/throttle wbc->nr_to_write in the filesystem
writepages callback. That cause wrong behaviour in
generic_sync_sb_inodes caused by wbc->nr_to_write being <= 0
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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DIO and fallocate credit calculation is different than writepage, as
they do start a new journal right for each call to ext4_get_blocks_wrap().
This patch uses the helper function in DIO and fallocate case, passing
a flag indicating that the modified data are contigous thus could account
less indirect/index blocks.
This patch also fixed the journal credit reservation for direct I/O
(DIO). Previously the estimated credits for DIO only was calculated for
non-extent files, which was not enough if the file is extent-based.
Also fixed was fallocate double-counting credits for modifying the the
superblock.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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This patch modified the writepage/write_begin credit calculation for
extent files, to use the credits caculation helper function.
The current calculation of how many index/leaf blocks should be
accounted is too conservetive, it always considered the worse case,
where the tree level is 5, and in the case of multiple chunk
allocations, it always assumed no blocks were dirtied in common across
the allocations. This path uses the accurate depth of the inode with
some extras to calculate the index blocks, and also less conservative in
the case of multiple allocation accounting.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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When considering how many journal credits are needed for modifying a
chunk of data, we need to account for the super block, inode block,
quota blocks and xattr block, indirect/index blocks, also, group bitmap
and group descriptor blocks for new allocation (including data and
indirect/index blocks). There are many places in ext4 do the calculation
on their own and often missed one or two meta blocks, and often they
assume single block allocation, and did not considering the multile
chunk of allocation case.
This patch is trying to cleanup current journal credit code, provides
some common helper funtion to calculate the journal credits, to be used
for writepage, writepages, DIO, fallocate, migration, defrag, and for
both nonextent and extent files.
This patch modified the writepage/write_begin credit caculation for
nonextent files, to use the new helper function. It also fixed the
problem that writepage on nonextent files did not consider the case
blocksize <pagesize, thus could possibelly need multiple block
allocation in a single transaction.
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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The find_group_flex() function starts with best_flex as the
parent_fbg_group, which happens to have 0 inodes free. Some of the
flex groups searched have free blocks and free inodes, but the
flex_freeb_ratio is < 10, so they're skipped. Then when a group is
compared to the current "best" flex group, it does not have more free
blocks than "best", so it is skipped as well.
This continues until no flex group with free inodes is found which has
a proper ratio or which has more free blocks than the "best" group,
and we're left with a "best" group that has 0 inodes free, and we
return -ENOSPC.
We fix this by changing the logic so that if the current "best" flex
group has no inodes free, and the current one does have room, it is
promoted to the next "best."
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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When trying to resize an ext4 fs and you run out of reserved gdt blocks,
you get an error that doesn't actually tell you what went wrong, it just
says that the gdb it picked is not correct, which is the case since you
don't have any reserved gdt blocks left. This patch adds a check to make
sure you have reserved gdt blocks to use, and if not prints out a more
relevant error.
Signed-off-by: Josef Bacik <jbacik@redhat.com>
Cc: <linux-ext4@vger.kernel.org>
Cc: Andreas Dilger <adilger@sun.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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In ext4_ext_truncate(), we should use the more generic
ext4_discard_reservations() call so we do the right thing when the
filesystem is mounted with the nomballoc option.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Mingming Cao <cmm@us.ibm.com>
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This fixes a bug where readdir() would return a directory entry twice
if there was a hash collision in an hash tree indexed directory.
Signed-off-by: Eugene Dashevsky <eugene@ibrix.com>
Signed-off-by: Mike Snitzer <msnitzer@ibrix.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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