Randy Dunlap [Wed, 3 Aug 2011 23:21:11 +0000 (16:21 -0700)]
tpm_tis: fix build when ACPI is not enabled
Fix tpm_tis.c build when CONFIG_ACPI is not enabled by providing a stub
function. Fixes many build errors/warnings:
drivers/char/tpm/tpm_tis.c:89: error: dereferencing pointer to incomplete type
drivers/char/tpm/tpm_tis.c:89: warning: type defaults to 'int' in declaration of 'type name'
drivers/char/tpm/tpm_tis.c:89: error: request for member 'list' in something not a structure or union
drivers/char/tpm/tpm_tis.c:89: warning: type defaults to 'int' in declaration of '__mptr'
drivers/char/tpm/tpm_tis.c:89: error: dereferencing pointer to incomplete type
drivers/char/tpm/tpm_tis.c:89: error: dereferencing pointer to incomplete type
drivers/char/tpm/tpm_tis.c:89: error: dereferencing pointer to incomplete type
drivers/char/tpm/tpm_tis.c:89: warning: type defaults to 'int' in declaration of 'type name'
drivers/char/tpm/tpm_tis.c:89: error: request for member 'list' in something not a structure or union
drivers/char/tpm/tpm_tis.c:89: warning: type defaults to 'int' in declaration of 'type name'
drivers/char/tpm/tpm_tis.c:89: error: dereferencing pointer to incomplete type
drivers/char/tpm/tpm_tis.c:89: error: dereferencing pointer to incomplete type
drivers/char/tpm/tpm_tis.c:89: error: dereferencing pointer to incomplete type
drivers/char/tpm/tpm_tis.c:89: warning: type defaults to 'int' in declaration of 'type name'
drivers/char/tpm/tpm_tis.c:89: error: request for member 'list' in something not a structure or union
drivers/char/tpm/tpm_tis.c:89: warning: type defaults to 'int' in declaration of '__mptr'
drivers/char/tpm/tpm_tis.c:89: error: dereferencing pointer to incomplete type
drivers/char/tpm/tpm_tis.c:89: error: dereferencing pointer to incomplete type
drivers/char/tpm/tpm_tis.c:89: error: dereferencing pointer to incomplete type
drivers/char/tpm/tpm_tis.c:89: warning: type defaults to 'int' in declaration of 'type name'
drivers/char/tpm/tpm_tis.c:89: error: request for member 'list' in something not a structure or union
drivers/char/tpm/tpm_tis.c:89: warning: type defaults to 'int' in declaration of 'type name'
drivers/char/tpm/tpm_tis.c:90: error: dereferencing pointer to incomplete type
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Cc: Leendert van Doorn <leendert@watson.ibm.com> Cc: James Morris <jmorris@namei.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Heiko Carstens [Wed, 3 Aug 2011 14:44:32 +0000 (16:44 +0200)]
[S390] signal: use set_restore_sigmask() helper
We should call set_restore_sigmask() instead of directly setting
TIF_RESTORE_SIGMASK. This change should have been done three years
earlier... see 4e4c22 "signals: add set_restore_sigmask".
Heiko Carstens [Wed, 3 Aug 2011 14:44:31 +0000 (16:44 +0200)]
[S390] smp: remove pointless comments in startup_secondary()
Remove pointless comments in startup_secondary(). There is not too much
value in having comments like e.g. "call cpu notifiers" just before a
call to notify_cpu*().
Peter Huewe [Wed, 3 Aug 2011 14:44:30 +0000 (16:44 +0200)]
[S390] qdio: Use kstrtoul_from_user
This patch replaces the code for getting an unsigned long from a
userspace buffer by a simple call to kstroul_from_user.
This makes it easier to read and less error prone.
Signed-off-by: Peter Huewe <peterhuewe@gmx.de> Acked-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Peter Huewe [Wed, 3 Aug 2011 14:44:29 +0000 (16:44 +0200)]
[S390] sclp_async: Use kstrtoul_from_user
This patch replaces the code for getting an unsigned long from a
userspace buffer by a simple call to kstroul_from_user.
This makes it easier to read and less error prone.
Signed-off-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Heiko Carstens [Wed, 3 Aug 2011 14:44:27 +0000 (16:44 +0200)]
[S390] cpu hotplug: on cpu start wait until being marked active
This is the same as fd8a7de1 "x86: cpu-hotplug: Prevent softirq wakeup
on wrong CPU".
Unlike on x86 this doesn't fix a bug on s390 since we do not have
threaded interrupt handlers. However we want to keep the same
initialization order like on x86. This should prevent bugs caused by
code which assumes (and relies on) the init order is the same on each
architecture.
[S390] dasd: check if raw track access is supported
To use raw track access some special storage server commands are
needed. Older storage hardware may not support these commands.
So check if raw track access is possible while setting the DASD
online.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Michael Holzheu [Wed, 3 Aug 2011 14:44:21 +0000 (16:44 +0200)]
[S390] Export store_status() function
For kdump we need a store status function to save the registers for the
current CPU. Therefore this patch exports a function "store_status()".
In addition to that now also floating point registers are saved correctly.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
[S390] dasd: use vmalloc for statistics input buffer
The size of the buffer that is used to store DASD statistics input
strings depends on the user input. If the input string is to large,
the write operation could fail with -ENOMEM. To avoid this, use
vmalloc instead of kmalloc.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Michael Holzheu [Wed, 3 Aug 2011 14:44:19 +0000 (16:44 +0200)]
[S390] Add PSW restart shutdown trigger
With this patch a new S390 shutdown trigger "restart" is added. If under
z/VM "systerm restart" is entered or under the HMC the "PSW restart" button
is pressed, the PSW located at 0 (31 bit) or 0x1a0 (64 bit) bit is loaded.
Now we execute do_restart() that processes the restart action that is
defined under /sys/firmware/shutdown_actions/on_restart. Currently the
following actions are possible: reipl (default), stop, vmcmd, dump, and
dump_reipl.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Jan Glauber [Wed, 3 Aug 2011 14:44:18 +0000 (16:44 +0200)]
[S390] missing return in page_table_alloc_pgste
Fix the following compile warning for !CONFIG_PGSTE:
CC arch/s390/mm/pgtable.o
arch/s390/mm/pgtable.c: In function ‘page_table_alloc_pgste’:
arch/s390/mm/pgtable.c:531:1: warning: no return statement in function returning non-void [-Wreturn-type]
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Jan Glauber [Wed, 3 Aug 2011 14:44:17 +0000 (16:44 +0200)]
[S390] qdio: 2nd stage retry on SIGA-W busy conditions
The SIGA-W may return with the busy bit set which means the device was
blocked. The busy loop which retries the SIGA-W for 100us may not be
long enough when running under a heavily loaded hypervisor.
Extend the retry mechanism by adding a longer second stage which retries
the SIGA-W for up to 10s. In difference to the first retry loop the second
stage is using mdelay to stop the cpu between the retries and thereby
avoid additional preassure in on the hypervisor.
If the second stage retry is successfull a device reset is avoided.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
John Crispin [Mon, 18 Jul 2011 20:08:40 +0000 (22:08 +0200)]
MIPS: Lantiq: Fix external interrupt sources
The irq base offset needs to be ignored when matching irqs to external
interrupt pins. Taking the offset into account resulted in the EIU not
being brought up properly.
staging: zcache: include module.h for MODULE_LICENSE
The oncoming cleanup of module.h usage requires the explicit inclusion
of module.h when it was otherwise being included indirectly. Otherwise,
building zcache will fail.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Yaniv Rosner [Tue, 2 Aug 2011 23:00:12 +0000 (23:00 +0000)]
bnx2x: Clear MDIO access warning during first driver load
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Yaniv Rosner [Tue, 2 Aug 2011 23:00:06 +0000 (23:00 +0000)]
bnx2x: Fix BCM578xx MAC test
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Yaniv Rosner [Tue, 2 Aug 2011 23:00:00 +0000 (23:00 +0000)]
bnx2x: Fix BCM54618se invalid link indication
After resetting BCM54618se, link partner would still see link since the PHY wasn't put into low-power state.
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Yaniv Rosner [Tue, 2 Aug 2011 22:59:53 +0000 (22:59 +0000)]
bnx2x: Fix BCM84833 link
BCM84833 fail to link due to incorrect auto-negotiation setting.
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Yaniv Rosner [Tue, 2 Aug 2011 22:59:47 +0000 (22:59 +0000)]
bnx2x: Fix link issue with DAC over 578xx
Fix no-link issue on BCM578xx when direct attached cable is connected since Warpcore microcode restart was missing to re-read the new mode.
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Yaniv Rosner [Tue, 2 Aug 2011 22:59:40 +0000 (22:59 +0000)]
bnx2x: Fix LED behavior
This fix resolve two problems seen regarding LED:
1. LED doesn't flash during port identification.
2. Traffic LED sometimes do not blink.
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Yaniv Rosner [Tue, 2 Aug 2011 22:59:32 +0000 (22:59 +0000)]
bnx2x: Fix BCM578xx-B0 MDIO access
Fix MDIO access to Warpcore on new chip version of 578xx.
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Yaniv Rosner [Tue, 2 Aug 2011 22:59:25 +0000 (22:59 +0000)]
bnx2x: Fix remote fault handling
Fix couple of issues of remote fault detection and handling:
Link may go down due to remote fault indications during link establishment.
Possible link down after primary function migration.
Remote fault was not detected on 578xx.
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Yaniv Rosner [Tue, 2 Aug 2011 22:59:18 +0000 (22:59 +0000)]
bnx2x: Fix chip hanging due to TX pipe stall.
Fix a problem in which the 578xx chip hangs after running traffic, and then pulling the network cable.
This occurs since TX pipe is stalled due to missing XON indication towards the NIG.
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Yaniv Rosner [Tue, 2 Aug 2011 22:59:10 +0000 (22:59 +0000)]
bnx2x: Fix missing pause on for 578xx
When link speed is 1G and below, pause weren't sent due to missing pause setting in the UMAC.
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Wed, 3 Aug 2011 07:14:05 +0000 (21:14 -1000)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: (31 commits)
Btrfs: don't call writepages from within write_full_page
Btrfs: Remove unused variable 'last_index' in file.c
Btrfs: clean up for find_first_extent_bit()
Btrfs: clean up for wait_extent_bit()
Btrfs: clean up for insert_state()
Btrfs: remove unused members from struct extent_state
Btrfs: clean up code for merging extent maps
Btrfs: clean up code for extent_map lookup
Btrfs: clean up search_extent_mapping()
Btrfs: remove redundant code for dir item lookup
Btrfs: make acl functions really no-op if acl is not enabled
Btrfs: remove remaining ref-cache code
Btrfs: remove a BUG_ON() in btrfs_commit_transaction()
Btrfs: use wait_event()
Btrfs: check the nodatasum flag when writing compressed files
Btrfs: copy string correctly in INO_LOOKUP ioctl
Btrfs: don't print the leaf if we had an error
btrfs: make btrfs_set_root_node void
Btrfs: fix oops while writing data to SSD partitions
Btrfs: Protect the readonly flag of block group
...
Fix up trivial conflicts (due to acl and writeback cleanups) in
- fs/btrfs/acl.c
- fs/btrfs/ctree.h
- fs/btrfs/extent_io.c
Linus Torvalds [Wed, 3 Aug 2011 06:49:57 +0000 (20:49 -1000)]
Merge branch 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6
* 'devicetree/next' of git://git.secretlab.ca/git/linux-2.6:
MAINTAINERS: Add keyword match for of_match_table to device tree section
of: constify property name parameters for helper functions
input: xilinx_ps2: Add missing of_address.h header
of: address: use resource_size helper
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-watchdog:
watchdog: Cleanup WATCHDOG_CORE help text
watchdog: Fix POST failure on ASUS P5N32-E SLI and similar boards
watchdog: shwdt: fix usage of mod_timer
Input close or device disable should not interact with the exported
gpiolib functionality. However that's the case. __ad7879_disable()
clears the entire AD7879_REG_CTRL2, while it should just power down
the ADC and its reference.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Paul Gortmaker [Sun, 31 Jul 2011 21:36:35 +0000 (21:36 +0000)]
sh: Fix conflicting definitions of ptrace_triggered
The extra nmi argument is causing this compile fail:
CC arch/sh/kernel/ptrace_32.o
arch/sh/kernel/ptrace_32.c:66:6: error: conflicting types for 'ptrace_triggered'
arch/sh/include/asm/ptrace.h:126:13: note: previous declaration of 'ptrace_triggered' was here
make[3]: *** [arch/sh/kernel/ptrace_32.o] Error 1
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Magnus Damm [Tue, 2 Aug 2011 09:42:54 +0000 (09:42 +0000)]
serial: sh-sci: fix DMA build by including dma-mapping.h
Include dma-mapping.h to fix build of the sh-sci driver on
SH-Mobile ARM (sh73a0) when CONFIG_SERIAL_SH_SCI_DMA=y:
drivers/tty/serial/sh-sci.c: In function 'sci_rx_dma_release':
drivers/tty/serial/sh-sci.c:1182:3: error: implicit declaration of function 'dma_free_coherent'
drivers/tty/serial/sh-sci.c: In function 'work_fn_tx':
drivers/tty/serial/sh-sci.c:1333:2: error: implicit declaration of function 'dma_sync_sg_for_device'
drivers/tty/serial/sh-sci.c: In function 'sci_request_dma':
drivers/tty/serial/sh-sci.c:1498:3: error: implicit declaration of function 'dma_map_sg'
drivers/tty/serial/sh-sci.c:1527:3: error: implicit declaration of function 'dma_alloc_coherent'
drivers/tty/serial/sh-sci.c:1527:10: warning: assignment makes pointer from integer without a cast
make[3]: *** [drivers/tty/serial/sh-sci.o] Error 1
make[2]: *** [drivers/tty/serial] Error 2
make[1]: *** [drivers/tty] Error 2
make: *** [drivers] Error 2
Signed-off-by: Magnus Damm <damm@opensource.se> Tested-by: Simon Horman <horms@verge.net.au> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Paul Mundt [Wed, 3 Aug 2011 03:33:20 +0000 (12:33 +0900)]
serial: sh-sci: Fix up default regtype probing.
Presently the default regtype probing inadvertently bails out due to an
inverted error check. This fixes it up, and gets platforms without
explicit regtype specifications working again.
Reported-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Jeff Layton [Tue, 26 Jul 2011 16:20:18 +0000 (12:20 -0400)]
cifs: demote DFS referral lookup errors to cFYI
cifs: demote DFS referral lookup errors to cFYI
Now that we call into this routine on every mount, anyone who doesn't
have the upcall configured will get multiple printks about failed lookups.
Reported-and-Tested-by: Martijn Uffing <mp3project@sarijopen.student.utwente.nl> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
Ralf Baechle [Tue, 2 Aug 2011 23:52:48 +0000 (00:52 +0100)]
MIPS: tlbex: Fix build error in R3000 code.
Only some GCC versions such as gcc 4.2 notice that the variable wr in
build_r3000_tlb_modify_handler is used uninitialized. When using one
of those GCCs the build will fail due to -Werror. GCC 4.6 does not
warn about the uninitialized use of wr.
In this code, blkvsc_req is allocated in the cache blkdev->request_pool,
but freed in the first case to the cache blkvsc_req->dev->request_pool.
blkvsc_req->dev is subsequently initialized to blkdev, making these the
same at the second call to kmem_cache_free. But at the point of the first
call, blkvsc_req->dev is NULL. The second call is changed too, for
uniformity.
The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@@
expression x,e,e1,e2,e3;
@@
x = \(kmem_cache_alloc\|kmem_cache_zalloc\)(e1,e2)
... when != x = e
(
kmem_cache_free(e1,x);
|
?-kmem_cache_free(e3,x);
+kmem_cache_free(e1,x);
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk> Cc: KY Srinivasan <kys@microsoft.com> Cc: Hank Janssen <hjanssen@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Andrew Morton [Thu, 28 Jul 2011 20:59:35 +0000 (13:59 -0700)]
drivers/staging/speakup/devsynth.c: fix "buffer size is not provably correct" error
x86_64 allmodconfig:
In file included from arch/x86/include/asm/uaccess.h:572,
from include/linux/uaccess.h:5,
from drivers/staging/speakup/devsynth.c:4:
In function 'copy_from_user',
inlined from 'speakup_file_write' at drivers/staging/speakup/devsynth.c:28:
arch/x86/include/asm/uaccess_64.h:64: error: call to 'copy_from_user_overflow' declared with attribute error: copy_from_user() buffer size is not provably correct
I'm not sure what was unprovable about it, but size_t is the correct type
anyway.
Also replace needless min_t() with min()
Cc: William Hubbs <w.d.hubbs@gmail.com> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Paul Gortmaker [Sun, 31 Jul 2011 06:44:05 +0000 (02:44 -0400)]
staging: ft1000_proc needs asm/io.h for inw/outw on sparc
Seen during an allmodconfig build for sparc:
CC [M] drivers/staging/ft1000/ft1000-pcmcia/ft1000_proc.o
In file included from drivers/staging/ft1000/ft1000-pcmcia/ft1000_proc.c:26:
drivers/staging/ft1000/ft1000-pcmcia/ft1000.h: In function 'ft1000_read_reg':
drivers/staging/ft1000/ft1000-pcmcia/ft1000.h:80: error: implicit declaration of function 'inw'
drivers/staging/ft1000/ft1000-pcmcia/ft1000.h: In function 'ft1000_write_reg':
drivers/staging/ft1000/ft1000-pcmcia/ft1000.h:86: error: implicit declaration of function 'outw'
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
declaring MODULE_FIRMWARE has apparently forgotten while removing the embedded
firmware arrays in 0a8692b534e18fcec6eac07551bb37a22659f5c7 (rtl8192u_usb:
Remove built-in firmware images).
zcache is only building tmem.c and not building zcache.c. To keep the
module name, zcache.c must be renamed if symbols from tmem.c are to
remain unexported.
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> Acked-by: Dan Magenheimer <dan.magenheimer@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Mark Brown [Tue, 2 Aug 2011 05:13:26 +0000 (14:13 +0900)]
MAINTAINERS: Add keyword match for of_match_table to device tree section
If a patch is working with an of_match_table it's probably adding an OF
binding to a driver in which case the binding ought to be reviewed by the
device tree folks to make sure that things like the device matches are set
up correctly.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Linus Walleij [Tue, 2 Aug 2011 09:29:24 +0000 (11:29 +0200)]
spi/pl022: remove function cannot exit
The remove function in the PL022 driver cannot abort the remove
function any way, so restructure the code so as not to make that
assumption. Remove will now proceed no matter whether it can
stop the transfer queue or not.
Reported-by: Russell King <linux@arm.linux.org.uk> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Mike Snitzer [Tue, 2 Aug 2011 11:32:08 +0000 (12:32 +0100)]
dm table: set flush capability based on underlying devices
DM has always advertised both REQ_FLUSH and REQ_FUA flush capabilities
regardless of whether or not a given DM device's underlying devices
also advertised a need for them.
Block's flush-merge changes from 2.6.39 have proven to be more costly
for DM devices. Performance regressions have been reported even when
DM's underlying devices do not advertise that they have a write cache.
Fix the performance regressions by configuring a DM device's flushing
capabilities based on those of the underlying devices' capabilities.
Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Milan Broz [Tue, 2 Aug 2011 11:32:08 +0000 (12:32 +0100)]
dm crypt: optionally support discard requests
Add optional parameter field to dmcrypt table and support
"allow_discards" option.
Discard requests bypass crypt queue processing. Bio is simple remapped
to underlying device.
Note that discard will be never enabled by default because of security
consequences. It is up to the administrator to enable it for encrypted
devices.
(Note that userspace cryptsetup does not understand new optional
parameters yet. Support for this will come later. Until then, you
should use 'dmsetup' to enable and disable this.)
Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
projects / karo-tx-linux.git / log