| Age | Commit message (Collapse) | Author |
|---|
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When a copy-on-write occurs, we take one of two paths in handle_mm_fault:
through handle_pte_fault for normal pages, or through hugetlb_fault for
huge pages.
In the normal page case, we eventually get to do_wp_page and call mmu
notifiers via ptep_clear_flush_notify. There is no callout to the mmmu
notifiers in the huge page case. This patch fixes that.
Signed-off-by: Doug Doan <dougd@cray.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Provide an INIT_MM_CONTEXT intializer macro which can be used to
statically initialize mm_struct:mm_context of init_mm. This way we can
get rid of code which will do the initialization at run time (on s390).
In addition the current code can be found at a place where it is not
expected. So let's have a common initializer which architectures
can use if needed.
This is based on a patch from Suzuki Poulose.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Suzuki Poulose <suzuki@in.ibm.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Use ERR_CAST(x) rather than ERR_PTR(PTR_ERR(x)). The former makes more
clear what is the purpose of the operation, which otherwise looks like a
no-op.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
type T;
T x;
identifier f;
@@
T f (...) { <+...
- ERR_PTR(PTR_ERR(x))
+ x
...+> }
@@
expression x;
@@
- ERR_PTR(PTR_ERR(x))
+ ERR_CAST(x)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Use memdup_user when user data is immediately copied into the
allocated region.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
expression from,to,size,flag;
position p;
identifier l1,l2;
@@
- to = \(kmalloc@p\|kzalloc@p\)(size,flag);
+ to = memdup_user(from,size);
if (
- to==NULL
+ IS_ERR(to)
|| ...) {
<+... when != goto l1;
- -ENOMEM
+ PTR_ERR(to)
...+>
}
- if (copy_from_user(to, from, size) != 0) {
- <+... when != goto l2;
- -EFAULT
- ...+>
- }
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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The start/stop_critical_timing functions for preemptirqsoff, preemptoff
and irqsoff tracers contain atomic_inc() and atomic_dec() operations.
Atomic operations use local_irq_save/restore macros to ensure atomic
access but they are traced by the same function which is causing recursion
problem.
The reason is when these tracers are turn ON then the
local_irq_save/restore macros are changed in include/linux/irqflags.h to
call trace_hardirqs_on/off which call start/stop_critical_timing.
Microblaze was affected because it uses generic atomic implementation.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix a build failure "error: void value not ignored as it ought to be"
by removing an assignment of a void return value. The functionality of
the code is not changed.
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Acked-by: Henrik Kretzschmar <henne@nachtwindheim.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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After the commit that changed ipmi_si detecting sequence from SMBIOS/ACPI
to ACPI/SMBIOS,
| commit 754d453185275951d39792865927ec494fa1ebd8
| Author: Matthew Garrett <mjg@redhat.com>
| Date: Wed May 26 14:43:47 2010 -0700
|
| ipmi: change device discovery order
|
| The ipmi spec provides an ordering for si discovery. Change the driver to
| match, with the exception of preferring smbios to SPMI as HPs (at least)
| contain accurate information in the former but not the latter.
ipmi_si can not be initialized.
[ 138.799739] calling init_ipmi_devintf+0x0/0x109 @ 1
[ 138.805050] ipmi device interface
[ 138.818131] initcall init_ipmi_devintf+0x0/0x109 returned 0 after 12797 usecs
[ 138.822998] calling init_ipmi_si+0x0/0xa90 @ 1
[ 138.840276] IPMI System Interface driver.
[ 138.846137] ipmi_si: probing via ACPI
[ 138.849225] ipmi_si 00:09: [io 0x0ca2] regsize 1 spacing 1 irq 0
[ 138.864438] ipmi_si: Adding ACPI-specified kcs state machine
[ 138.870893] ipmi_si: probing via SMBIOS
[ 138.880945] ipmi_si: Adding SMBIOS-specified kcs state machineipmi_si: duplicate interface
[ 138.896511] ipmi_si: probing via SPMI
[ 138.899861] ipmi_si: Adding SPMI-specified kcs state machineipmi_si: duplicate interface
[ 138.917095] ipmi_si: Trying ACPI-specified kcs state machine at i/o address 0xca2, slave address 0x0, irq 0
[ 138.928658] ipmi_si: Interface detection failed
[ 138.953411] initcall init_ipmi_si+0x0/0xa90 returned 0 after 110847 usecs
in smbios has
DMI/SMBIOS
Handle 0x00C5, DMI type 38, 18 bytes
IPMI Device Information
Interface Type: KCS (Keyboard Control Style)
Specification Version: 2.0
I2C Slave Address: 0x00
NV Storage Device: Not Present
Base Address: 0x0000000000000CA2 (I/O)
Register Spacing: 32-bit Boundaries
in DSDT has
Device (BMC)
{
Name (_HID, EisaId ("IPI0001"))
Method (_STA, 0, NotSerialized)
{
If (LEqual (OSN, Zero))
{
Return (Zero)
}
Return (0x0F)
}
Name (_STR, Unicode ("IPMI_KCS"))
Name (_UID, Zero)
Name (_CRS, ResourceTemplate ()
{
IO (Decode16,
0x0CA2, // Range Minimum
0x0CA2, // Range Maximum
0x00, // Alignment
0x01, // Length
)
IO (Decode16,
0x0CA6, // Range Minimum
0x0CA6, // Range Maximum
0x00, // Alignment
0x01, // Length
)
})
Method (_IFT, 0, NotSerialized)
{
Return (One)
}
Method (_SRV, 0, NotSerialized)
{
Return (0x0200)
}
}
so the reg spacing should be 4 instead of 1.
Try to calculate regspacing for this kind of system.
Observed on a Sun Fire X4800. Other OSes work and pass certification.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-by: Matthew Garrett <mjg@redhat.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Myron Stowe <myron.stowe@hp.com>
Cc: Corey Minyard <minyard@acm.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
drm: fix fallouts from slow-work -> wq conversion
workqueue: workqueue_cpu_callback() should be cpu_notifier instead of hotcpu_notifier
workqueue: add missing __percpu markup in kernel/workqueue.c
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Expand the crtc_gamma_set function to accept a starting offset. The
reason for this is to eventually use this function for setcolreg from
drm_fb_helper.c. The fbdev colormap function can start at any offset in
the color map.
Signed-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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... of the code, not of the mode lists.
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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This brings us in line with the EDID spec recommendation for mode
priority sorting. We still don't extract all the modes we could from
VTB, but VTB is so rare in the wild that I'm not really concerned.
Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Signed-off-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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This is consistent with trying to access a filename that not exist
within a directory which is a good analogy here. The main reason for the
change is that it is easy to confuse the error code of EBADF as an
performing an ioctl on an invalid file descriptor (rather than an
unknown object).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Fixes lack of power saving with multiple heads on
some desktop cards.
Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=16474
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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HPD pins are reversed
Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=29387
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Change the interface to expect a PTR_ERR specifing the real error code
as opposed to assuming a NULL return => -EINVAL. Just once the user may
not be at fault!
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Smatch complained that the ERR_PTR from hwmon_device_register() wasn't
handled. I added some error handling in radeon_hwmon_init() to silence
the warning.
Unfortunately errors from radeon_pm_init() aren't handled so this
doesn't really make a difference beyond silencing the warning.
Also I changed DRM_ERROR() to dev_err() which is the new preferred
method.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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router objects are found on systems that use a mux to control
ddc line to connector routing or to control the actual clock and data
routing from the chip to the connectors. This patch implements ddc line
routing.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Handle asic specific table to hw mappings in
combios_setup_i2c_bus() directly. This allows us
to remove most of the combios quirks and clean up
the i2c bus setup.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Previously we added i2c buses as needed when enumerating connectors
power management, etc. This only exposed the actual buses used and
could have lead to the same buse getting created more than once if
one buses was used for more than one purpose. This patch sets up
all i2c buses on the card in one place and users of the buses just
point back to the one instance.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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- buffer offsets in the base regs are 256b aligned so
shift properly when comparing, fixed by Andre Maasikas
- mipmap size was calculated wrong when nlevel=0
- texture bo offsets were used after the bo base address was added
- vertex resource size register is size - 1, not size
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Cc: Andre Maasikas <amaasikas@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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drivers/pci/intel-iommu.c: In function 'dma_pte_addr':
drivers/pci/intel-iommu.c:239: warning: passing argument 1 of '__cmpxchg64' from incompatible pointer type
It seems that __cmpxchg64() now cares about the type of its pointer argument,
so give it a (uint64_t *) instead of a pointer to a structure which contains
only that.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Allow disabling the source id checking while programming the interrupt
remap table entry. Useful for debugging or working around the broken
source id checks on some platforms.
Signed-off-by: Chris Wright <chrisw@redhat.com>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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SD/MMC host controller driver is same for all MSM and QSD
platforms. Hence, rename the config to reflect the same.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
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The controller base address is referred from platform
resource instead of using #defines. This fixes the
compilation error when driver is compiled for msm7x30.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
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Rename mmc_platform_data to msm_mmc_platform_data as it is used
only by MSM platform.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
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Add msm_add_sdcc() prototype to mach/board.h to fix the
checkpatch warning.
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
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Repair a section mismatch between the smd driver's
platform_driver structure and its probe method.
Signed-off-by: Gregory Bean <gbean@codeaurora.org>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
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Signed-off-by: Marek Olšák <maraeo@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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(For some reason I thought that went in ages ago ...)
This fixes support for PCI domains in what should hopefully be a backward
compatible way along with a change to libdrm.
When the interface version is set to 1.4, we assume userspace understands
domains and the world is at peace. We thus pass proper domain numbers
instead of 0 to userspace.
The newer libdrm will then try 1.4 first, and fallback to 1.1, along with
ignoring domains in the later case (well, except on alpha of course)
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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drm-core-next
* 'nouveau/for-airlied' of /ssd/git/drm-nouveau-next: (27 commits)
drm/nvc0: fix typo in PRAMIN flush
drm/nouveau: Fix DCB TMDS config parsing.
drm/nv30: Fix PFB init for nv31.
drm/nv04: Fix up SGRAM density detection.
drm/i2c/ch7006: Don't use POWER_LEVEL_FULL_POWER_OFF on early chip versions.
drm/nouveau: Init dcb->or on cards that have no usable DCB table.
drm/nouveau: reduce severity of some "error" messages
drm/nvc0: backup bar3 channel on suspend
drm/nouveau: implement init table opcodex 0x5e and 0x9a
drm/nouveau: implement init table op 0x57, INIT_LTIME
drm/nvc0: implement crtc pll setting
drm/nvc0: fix evo dma object so we display something
drm/nvc0: rudimentary instmem support
drm/nvc0: implement memory detection
drm/nvc0: allow INIT_GPIO
drm/nvc0: starting point for GF100 support, everything stubbed
drm/nv30: Workaround dual TMDS brain damage.
drm/nouveau: No need to set slave TV encoder configs explicitly.
drm/nv17-nv4x: Attempt to init some external TMDS transmitters.
drm/nv10: Fix up switching of NV10TCL_DMA_VTXBUF.
...
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This hasn't mattered up until the ioctl started using the value, and it fell
apart.
fixes fd.o 29340, Ubuntu LP 606081
[airlied: cleaned up whitespace and don't need an error before pushing]
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Cc: stable@kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
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Fix the compiler warning:
fs/jbd2/transaction.c: In function ‘start_this_handle’:
fs/jbd2/transaction.c:98: warning: unused variable ‘ts’
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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just delay __put_super() a bit
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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If sget() finds a matching superblock being set up, it'll
grab an active reference to it and grab s_umount. That's
fine - we'll wait for completion of foofs_get_sb() that way.
However, if said foofs_get_sb() fails we'll end up holding
the halfway-created superblock. deactivate_locked_super()
called by foofs_get_sb() will just unlock the sucker since
we are holding another active reference to it.
What we need is a way to tell if superblock has been successfully
set up. Unfortunately, neither ->s_root nor the check for
MS_ACTIVE quite fit. Cheap and easy way, suitable for backport:
new flag set by the (only) caller of ->get_sb(). If that flag
isn't present by the time sget() grabbed s_umount on preexisting
superblock it has found, it's seeing a stillborn and should
just bury it with deactivate_locked_super() (and repeat the search).
Longer term we want to set that flag in ->get_sb() instances (and
check for it to distinguish between "sget() found us a live sb"
and "sget() has allocated an sb, we need to set it up" in there,
instead of checking ->s_root as we do now).
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@kernel.org
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Fix an obscure AB-BA deadlock in get_sb_bdev().
When a superblock is mounted more than once get_sb_bdev() calls
close_bdev_exclusive() to drop the extra bdev reference while holding
s_umount. However, sb->s_umount nests inside bd_mutex during
__invalidate_device() and close_bdev_exclusive() acquires bd_mutex during
blkdev_put(); thus creating an AB-BA deadlock.
This condition doesn't trigger frequently. For this condition to be
visible to lockdep, the filesystem must occupy the whole device (as
__invalidate_device() only grabs bd_mutex for the whole device), the FS
must be mounted more than once and partition rescan should be issued while
the FS is still mounted.
Fix it by dropping s_umount over close_bdev_exclusive().
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Ciprian Docan <docan@eden.rutgers.edu>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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No need to mark the superblock as dirty in sysv_remount, synchronize
it instead (only if mounting R/O).
I did not find any docs about this file-system, and I have no possibility
to test my changes. Thus, this is untested. I see other issues in sysv,
e.g., why sysv_sync_fs writes only in the FSTYPE_SYSV4 case? However,
it marks its SB bh's dirty for all types, and does not wait for them
ever. With zero docs I'm unable to fix this.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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I did not find any docs about this file-system, and I have no possibility
to test my changes. Thus, this is untested.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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BTRFS does not define a '->write_super()' method, so it should
not mark its superblock as dirty. This looks like some left-over.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Acked-by: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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BFS is a very simple FS and its superblocks contains only static
information and is never changed. However, the BFS code for some
misterious reasons marked its buffer head as dirty from time to
time, but nothing in that buffer was ever changed.
This patch removes all the BFS superblock manipulation, simply
because it is not needed. It removes:
1. The si_sbh filed from 'struct bfs_sb_info' because it is not
needed. We only need to read the SB once on mount to get the
start of data blocks and the FS size. After this, we can forget
about the SB.
2. All instances of 'mark_buffer_dirty(sbh)' for BFS SB because
it is never changed.
3. The '->sync_fs()' method because there is nothing to sync
(inodes are synched by VFS).
4. The '->write_super()' method, again, because the SB is never
changed.
Tested-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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AFFS does not ever wait for superblock synchronization in
->put_super(), ->write_super, and ->sync_fs().
However, it should wait for synchronization in ->put_super() because
it is about to be unmounted, in ->write_super() because this is
periodic SB synchronization performed from a separate kernel thread,
and in ->sync_fs() it should respect the 'wait' flag. This patch fixes
the situation.
Also, in ->put_super(), do not write the SB if it is not dirty.
Tested-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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In 'affs_write_super()': remove ancient and wrong commented code,
remove unneeded 'clean' variable, so the function becomes a bit
cleaner and simpler.
In 'affs_remount(): remove unnecessary SB dirty flag changes.
Tested-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Remove the calls to inode_newsize_ok given that we already did it as
part of inode_change_ok in the beginning of cifs_setattr_(no)unix.
No need to call ->truncate if cifs doesn't have one, so remove the
explicit call in cifs_vmtruncate, and replace the calls to vmtruncate
with truncate_setsize which is vmtruncate minus inode_newsize_ok
and the call to ->truncate.
Rename cifs_vmtruncate to cifs_setsize to match the new calling conventions.
Question 1: why does cifs do the pagecache munging and i_size update twice
for each setattr call, once opencoded in cifs_vmtruncate, and once
using the VFS helpers?
Question 2: what is supposed to be protected by i_lock in cifs_vmtruncate?
Do we need it around the call to inode_change_ok?
[AV: fixed build breakage]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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The shrinker function is supposed to return the number of cache
entries after shrinking, not before shrinking. Fix that.
Based on a patch from Wang Sheng-Hui <crosslonelyover@gmail.com>.
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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The mbcache code was written to support a variable number of indexes,
but all the existing users use exactly one index. Simplify to code to
support only that case.
There are also no users of the cache entry free operation, and none of
the users keep extra data in cache entries. Remove those features as
well.
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Add a flags field to help glibc implementing statvfs(3) efficiently.
We copy the flag values from glibc, and add a new ST_VALID flag to
denote that f_flags is implemented.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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