Commit Graph

26504 Commits

Author SHA1 Message Date
Egry Gábor
4992a9e888 Trivial typo fixes in Kconfig files (MTD).
Signed-off-by: Egry Gábor <gaboregry@t-online.hu>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-12 17:35:02 +01:00
Kyungmin Park
752870707f OneNAND: fix block command typo
We need to check block cmd only instead with comparing with cmd

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2006-05-12 15:35:51 +01:00
Kyungmin Park
493c646077 OneNAND: One-Time Programmable (OTP) support
One Block of the NAND Flash Array memory is reserved as
a One-Time Programmable Block memory area.
Also, 1st Block of NAND Flash Array can be used as OTP.

The OTP block can be read, programmed and locked using the same
operations as any other NAND Flash Array memory block.
OTP block cannot be erased.

OTP block is fully-guaranteed to be a valid block.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2006-05-12 15:35:50 +01:00
Kyungmin Park
3cecf69ecd OneNAND: Handle erase correctly in Double Density Package (DDP)
There's erase bug in DDP.
We need to add DDP select in erase

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2006-05-12 15:35:48 +01:00
Kyungmin Park
34c1060959 OneNAND: Write oob area with aligned size, mtd->oobsize
There's some problem with write oob in serveral platform.
So we write oob with oobsize aligned (16bytes) instead of 3 bytes (from {2,
3})

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2006-05-12 15:35:47 +01:00
Kyungmin Park
8e6ec69059 OneNAND: Add write_oob verify function
Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
2006-05-12 15:35:47 +01:00
Jarkko Lavinen
d9777f1c42 OneNand: Fix free byte positions.
Some free byte positions at onenand_oob_64 were wrong. This was also
reported by Christian Lehne. 3 byte slots are at 2+16*i and 2 byte
slots at 14+16*i.

Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
2006-05-12 15:35:46 +01:00
Kyungmin Park
9c01f87db1 OneNAND: handle byte access on BufferRAM
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2006-05-12 15:35:45 +01:00
Kyungmin Park
628bee6593 OneNAND: Add touch_softlock_watchdog()
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
2006-05-12 15:35:45 +01:00
Jesper Juhl
20ffdcb00a [JFFS2] Remove number of pointer dereferences in fs/jffs2/summary.c
Reduce the nr.  of pointer dereferences in fs/jffs2/summary.c

Benefits:
 - micro speed optimization due to fewer pointer derefs
 - generated code is slightly smaller
 - better readability

(The first two sound like a compiler problem but I'll go with the third. dwmw2).

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-12 11:55:51 +01:00
Jean-Luc Leger
1867b7e3f8 [MTD] Fix invalid default value of CONFIG_MTD_PCMCIA_ANONYMOUS in Kconfig
Default values for boolean and tristate options can only be 'y', 'm' or 'n'.
This patch removes wrong default for MTD_PCMCIA_ANONYMOUS.

Signed-off-by: Jean-Luc Leger <jean-luc.leger@dspnet.fr.eu.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-12 11:53:40 +01:00
Domen Puncer
7e59f2ccd7 [JFFS2] Remove obsolete histo.h
This file hasn't actually been used since the very early days of JFFS2
when Arjan was playing with compression methods. It can go now.

Signed-off-by: Domen Puncer <domen@coderock.org>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-12 11:51:46 +01:00
David Woodhouse
f0ad11d060 [MTD] Fix capitalisation in export of old doc2001.c initfunc
Oops. Stupid StudlyCaps. Again.

This driver is doubly-deprecated because is was subsumed into doc2000.c
and _also_ we want people to start using the new NAND wrapper for these
devices anyway. But ISTR there was still one person using it because
something didn't work for them. Must chase that up and then I can kill
this.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-12 11:40:13 +01:00
David Woodhouse
179fdc3f8d [MTD] Basic NAND driver for AMD/NatSemi CS5535/CS5536 Geode companion chip
This lacks hardware ECC support and a few optimisations we're going to
want fairly soon, but it works well enough to mount and use JFFS2.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-11 22:35:28 +01:00
David Woodhouse
b04ecae3d6 [MTD] Fix capitalisation in export of DiskOnChip Millennium initfunc
Stupid StudlyCaps. Who did that?

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-10 16:16:13 +01:00
David Woodhouse
83ea4ef213 Export cfi_cmdset_0020 and cfi_cmdset_0002 with EXPORT_SYMBOL_GPL
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-08 22:58:25 +01:00
David Woodhouse
6f18a022fb Finally remove the obnoxious inter_module_xxx()
This was already a bad plan when I argued against adding it in the first
place. Good riddance.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-08 22:40:05 +01:00
David Woodhouse
a15bdeef10 Remove use of inter_module_crap in NOR flash chip drivers.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-08 22:35:05 +01:00
David Woodhouse
396674e58f Fix non-modular case for DiskOnChip probe
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-08 17:10:11 +01:00
David Woodhouse
5e535429a9 Remove inter_module_xxx() from DiskOnChip drivers.
Finally putting it back how it was before Keith got at it -- yay :)

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-08 14:05:05 +01:00
Lennert Buytenhek
73566edf9b [MTD] Convert physmap to platform driver
After dwmw2 let me know it ought to be done, I rewrote the physmap map
driver to be a platform driver.  I know zilch about the driver model,
so I probably botched it in some way, but I've done some tests on an
ixp23xx board which uses physmap, and it all seems to work.

In order to not break existing physmap users, I've added some compat
code that will instantiate a platform device iff CONFIG_MTD_PHYSMAP_LEN
is defined and != 0.  Also, I've changed the default value for
CONFIG_MTD_PHYSMAP_LEN to zero, so that people who inadvertently
compile in physmap (or new, platform-style, users of physmap) don't get
burned.

This works pretty well -- the new physmap driver is a drop-in replacement
for the old one, and works on said ixp23xx board without any code changes
needed.  (This should hold as long as users don't touch 'physmap_map'
directly.)

Once all physmap users have been converted to instantiate their own
platform devices, the compat code can go.  (Or we decide that we can
change all the in-tree users at the same time, and never merge the
compat code.)

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-07 17:16:36 +01:00
Dmitry Bazhenov
422138dd68 [JFFS2] Fix race in setting file attributes
It seems like there is a potential race in the function jffs2_do_setattr()
in the case when attributes of a symlink are updated. The symlink metadata
is read without having f->sem locked.

The following patch should fix the race.

Signed-off-by: Dmitry Bazhenov <atrey@emcraft.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-05 22:46:49 +01:00
David Woodhouse
edc4ff7c08 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-05-03 13:30:35 +01:00
David Woodhouse
cbb9a56177 Move jffs2_fs_i.h and jffs2_fs_sb.h from include/linux/ to fs/jffs2/
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2006-05-03 13:07:27 +01:00
Patrick McHardy
e17df688f7 [NETFILTER] SCTP conntrack: fix infinite loop
fix infinite loop in the SCTP-netfilter code: check SCTP chunk size to
guarantee progress of for_each_sctp_chunk(). (all other uses of
for_each_sctp_chunk() are preceded by do_basic_checks(), so this fix
should be complete.)

Based on patch from Ingo Molnar <mingo@elte.hu>

CVE-2006-1527

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-02 17:26:39 -07:00
Ayaz Abdulla
ebf34c9b6f forcedeth: fix multi irq issues
This patch fixes the issues with multiple irqs.

I am resending based on feedback. I decoupled the dma mask for
consistent memory and fixed leak with multiple irq in error path.

Thanks to Manfred for catching the spin lock problem.

Signed-Off-By: Ayaz Abdulla <aabdulla@nvidia.com>
2006-05-02 15:26:06 -04:00
Craig Brind
3e0d167a6b [PATCH] via-rhine: zero pad short packets on Rhine I ethernet cards
Fixes Rhine I cards disclosing fragments of previously transmitted frames
in new transmissions.

Before transmission, any socket buffer (skb) shorter than the ethernet
minimum length of 60 bytes was zero-padded.  On Rhine I cards the data can
later be copied into an aligned transmission buffer without copying this
padding.  This resulted in the transmission of the frame with the extra
bytes beyond the provided content leaking the previous contents of this
buffer on to the network.

Now zero-padding is repeated in the local aligned buffer if one is used.

Following a suggestion from the via-rhine maintainer, no attempt is made
here to avoid the duplicated effort of padding the skb if it is known that
an aligned buffer will definitely be used.  This is to make the change
"obviously correct" and allow it to be applied to a stable kernel if
necessary.  There is no change to the flow of control and the changes are
only to the Rhine I code path.

The patch has run on an in-service Rhine-I host without incident.  Frames
shorter than 60 bytes are now correctly zero-padded when captured on a
separate host.  I see no unusual stats reported by ifconfig, and no unusual
log messages.

Signed-off-by: Craig Brind <craigbrind@gmail.com>
Signed-off-by: Roger Luethi <rl@hellgate.ch>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-05-02 15:21:52 -04:00
Olaf Hering
b0b8dab288 [PATCH] mv643xx_eth: provide sysfs class device symlink
On Sat, Mar 11, Olaf Hering wrote:
> Why is the /sys/class/net/eth0/device symlink not created for the
> mv643xx_eth driver? Does this work for other platform device drivers?
> Seems to work for the ps2 keyboard at least.

The SET_NETDEV_DEV has to be done before a call to register_netdev.  With
the new patch below, the device symlink for the platform device was
created.  Unfortunately, after the 4 ls commands, the network connection
died.  No idea if the box crashed or if something else broke, lost remote
access.

Provide sysfs 'device' in /class/net/ethN Also, set module owner field,
like pcnet32 driver does.

Signed-off-by: Olaf Hering <olh@suse.de>
Acked-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-05-02 15:18:54 -04:00
Jens Axboe
330ab71619 [PATCH] vmsplice: restrict stealing a little more
Apply the same rules as the anon pipe pages, only allow stealing
if no one else is using the page.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-05-02 15:29:57 +02:00
Jens Axboe
a893b99be7 [PATCH] splice: fix page LRU accounting
Currently we rely on the PIPE_BUF_FLAG_LRU flag being set correctly
to know whether we need to fiddle with page LRU state after stealing it,
however for some origins we just don't know if the page is on the LRU
list or not.

So remove PIPE_BUF_FLAG_LRU and do this check/add manually in pipe_to_file()
instead.

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-05-02 15:03:27 +02:00
Jens Axboe
7591489a8f [PATCH] vmsplice: fix badly placed end paranthesis
We need to use the minium of {len, PAGE_SIZE-off}, not {len, PAGE_SIZE}-off.
The latter doesn't make any sense, and could cause us to attempt negative
length transfers...

Signed-off-by: Jens Axboe <axboe@suse.de>
2006-05-02 12:57:18 +02:00
Linus Torvalds
532f57da40 Merge branch 'audit.b10' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current
* 'audit.b10' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current:
  [PATCH] Audit Filter Performance
  [PATCH] Rework of IPC auditing
  [PATCH] More user space subject labels
  [PATCH] Reworked patch for labels on user space messages
  [PATCH] change lspp ipc auditing
  [PATCH] audit inode patch
  [PATCH] support for context based audit filtering, part 2
  [PATCH] support for context based audit filtering
  [PATCH] no need to wank with task_lock() and pinning task down in audit_syscall_exit()
  [PATCH] drop task argument of audit_syscall_{entry,exit}
  [PATCH] drop gfp_mask in audit_log_exit()
  [PATCH] move call of audit_free() into do_exit()
  [PATCH] sockaddr patch
  [PATCH] deal with deadlocks in audit_free()
2006-05-01 21:43:05 -07:00
Patrick McHardy
46c5ea3c9a [NETFILTER] x_tables: fix compat related crash on non-x86
When iptables userspace adds an ipt_standard_target, it calculates the size
of the entire entry as:

sizeof(struct ipt_entry) + XT_ALIGN(sizeof(struct ipt_standard_target))

ipt_standard_target looks like this:

  struct xt_standard_target
  {
        struct xt_entry_target target;
        int verdict;
  };

xt_entry_target contains a pointer, so when compiled for 64 bit the
structure gets an extra 4 byte of padding at the end. On 32 bit
architectures where iptables aligns to 8 byte it will also have 4
byte padding at the end because it is only 36 bytes large.

The compat_ipt_standard_fn in the kernel adjusts the offsets by

  sizeof(struct ipt_standard_target) - sizeof(struct compat_ipt_standard_target),

which will always result in 4, even if the structure from userspace
was already padded to a multiple of 8. On x86 this works out by
accident because userspace only aligns to 4, on all other
architectures this is broken and causes incorrect adjustments to
the size and following offsets.

Thanks to Linus for lots of debugging help and testing.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 20:48:32 -07:00
Linus Torvalds
9817d207dc Merge branch 'splice' of git://brick.kernel.dk/data/git/linux-2.6-block
* 'splice' of git://brick.kernel.dk/data/git/linux-2.6-block:
  [PATCH] vmsplice: allow user to pass in gift pages
  [PATCH] pipe: enable atomic copying of pipe data to/from user space
  [PATCH] splice: call handle_ra_miss() on failure to lookup page
  [PATCH] Add ->splice_read/splice_write to def_blk_fops
  [PATCH] pipe: introduce ->pin() buffer operation
  [PATCH] splice: fix bugs in pipe_to_file()
  [PATCH] splice: fix bugs with stealing regular pipe pages
2006-05-01 18:33:40 -07:00
Linus Torvalds
cf105601df Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/ipath: tidy up white space in a few files
  IB/ipath: fix label name in interrupt handler
  IB/ipath: improve sparse annotation
  IB/ipath: simplify IB timer usage
  IB/ipath: simplify RC send posting
  IB/ipath: prevent hardware from being accessed during reset
  IB/ipath: fix verbs registration
  IB/ipath: change handling of PIO buffers
  IB/ipath: iterate over correct number of ports during reset
  IB/ipath: set up 32-bit DMA mask if 64-bit setup fails
  IB/ipath: fix race with exposing reset file
  IB/mthca: Fix offset in query_gid method
2006-05-01 18:26:31 -07:00
Shaohua Li
6ba815ded3 [PATCH] timer TSC check suspend notifier change
At suspend time, the TSC CPUFREQ_SUSPENDCHANGE notifier change might
wrongly enable interrupt.  cpufreq driver suspend/resume is in interrupt
disabled environment.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:47 -07:00
Mikael Pettersson
160bd18e5e [PATCH] x86_64: make PC Speaker driver work
The PC Speaker driver's ->probe() routine doesn't even get called in the
64-bit kernels.  The reason for that is that the arch code apparently has
to explictly add a "pcspkr" platform device in order for the driver core to
call the ->probe() routine.  arch/i386/kernel/setup.c unconditionally adds
a "pcspkr" device, but the x86_64 kernel has no code at all related to the
PC Speaker.

The patch below copies the relevant code from i386 to x86_64, which makes
the PC Speaker work for me on x86_64.

Cc: Dmitry Torokhov <dtor_core@ameritech.net>
Acked-by: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:47 -07:00
Atsushi Nemoto
f3537ea7b9 [PATCH] genrtc: fix read on 64-bit platforms
Fix genrtc's read() routine for 64-bit platforms.  Current gen_rtc_read()
stores 64bit integer and returns 8 even if an user tried to read a 32bit
integer.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:47 -07:00
Atsushi Nemoto
3418ff7611 [PATCH] RTC: rtc-dev tweak for 64-bit kernel
Make rtc-dev work well on 64-bit platforms with 32-bit userland.  On those
platforms, users might try to read 32-bit integer value.  This patch make
rtc-dev's read() work well for both "int" and "long" size.  This tweak is came
from genrtc driver.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:46 -07:00
Heiko Carstens
b44df334a7 [PATCH] s390: bug in setup_rt_frame
Consider return value of __put_user() when setting up a signal frame
instead of ignoring it.

Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:46 -07:00
Heiko Carstens
022e4fc0fb [PATCH] s390: fix ipd handling
As pointed out by Paulo Marques <pmarques@grupopie.com> MAX_IPD_TIME is by
a factor of ten too small.  Since this means that we allow ten times more
IPDs in the intended time frame this could result in a cpu check stop of a
physical cpu.

Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:46 -07:00
Jeremy Kerr
8261aa6009 [PATCH] powerpc: cell: Add numa id to struct spu
Add an nid member to the spu structure, and store the numa id of the spu there
on creation.

Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:46 -07:00
Jeremy Kerr
953039c8df [PATCH] powerpc: Allow devices to register with numa topology
Change of_node_to_nid() to traverse the device tree, looking for a numa id.
Cell uses this to assign ids to SPUs, which are children of the CPU node.
Existing users of of_node_to_nid() are altered to use of_node_to_nid_single(),
which doesn't do the traversal.

Export an attach_sysdev_to_node() function, allowing system devices (eg.
SPUs) to link themselves into the numa topology in sysfs.

Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:46 -07:00
Joel H Schopp
bed120c64e [PATCH] spufs: fix for CONFIG_NUMA
Based on an older patch from  Mike Kravetz <kravetz@us.ibm.com>

We need to have a mem_map for high addresses in order to make fops->no_page
work on spufs mem and register files.  So far, we have used the
memory_present() function during early bootup, but that did not work when
CONFIG_NUMA was enabled.

We now use the __add_pages() function to add the mem_map when loading the
spufs module, which is a lot nicer.

Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:46 -07:00
Mike Kravetz
46a66eecdf [PATCH] sparsemem interaction with memory add bug fixes
This patch fixes two bugs with the way sparsemem interacts with memory add.
They are:

- memory leak if memmap for section already exists

- calling alloc_bootmem_node() after boot

These bugs were discovered and a first cut at the fixes were provided by
Arnd Bergmann <arnd@arndb.de> and Joel Schopp <jschopp@us.ibm.com>.

Signed-off-by: Mike Kravetz <kravetz@us.ibm.com>
Signed-off-by: Joel Schopp <jschopp@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:46 -07:00
Pat Gefre
2c43630fb0 [PATCH] Altix: correct ioc3 port order
Currently loading the ioc3 as a module will cause the ports to be numbered
in reverse order.  This mod maintains the proper order of cards for port
numbering.

Signed-off-by: Patrick Gefre <pfg@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:45 -07:00
Christoph Lameter
4c28f81193 [PATCH] page migration: Fix fallback behavior for dirty pages
Currently we check PageDirty() in order to make the decision to swap out
the page.  However, the dirty information may be only be contained in the
ptes pointing to the page.  We need to first unmap the ptes before checking
for PageDirty().  If unmap is successful then the page count of the page
will also be decreased so that pageout() works properly.

This is a fix necessary for 2.6.17.  Without this fix we may migrate dirty
pages for filesystems without migration functions.  Filesystems may keep
pointers to dirty pages.  Migration of dirty pages can result in the
filesystem keeping pointers to freed pages.

Unmapping is currently not be separated out from removing all the
references to a page and moving the mapping.  Therefore try_to_unmap will
be called again in migrate_page() if the writeout is successful.  However,
it wont do anything since the ptes are already removed.

The coming updates to the page migration code will restructure the code
so that this is no longer necessary.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:45 -07:00
Jeff Dike
a4b741e380 [PATCH] uml: uml-makefile-nicer uses SYMLINK incorrectly
Blaisorblade's uml-makefile-nicer makes a V=0 build say SYMLINK where
what's happening is really a LINK.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Acked-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:45 -07:00
Paolo 'Blaisorblade' Giarrusso
cead61a671 [PATCH] uml: export symbols added by GCC hardened
GCC hardened introduces additional symbol refererences (for the canary and
friends), also in modules - add weak export_symbols for them.  We already
tested that the weak declaration creates no problem on both GCC's providing
the function definition and on GCC's which don't provide it.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:45 -07:00
Paolo 'Blaisorblade' Giarrusso
7b12b91379 [PATCH] uml: cleanup unprofile expression and build infrastructure
*) Rather than duplicate in various buggy ways the application of
   CFLAGS_NO_HARDENING and UNPROFILE (which apply to the same files),
   centralize it in Makefile.rules.  UNPROFILE_OBJS mustn't be listed in
   USER_OBJS but are compiled as such.

I've also verified that unprofile didn't work in the current form, because we
set _c_flags directly (using CFLAGS and not USER_CFLAGS, which is wrong),
which is normally used by c_flags, but we also override c_flags for all
USER_OBJS, and there we don't call unprofile.

Instead it only worked for unmap.o, the only one which wasn't a USER_OBJ.

We need to set c_flags (which is not a public Kbuild API) to clear a lot of
compilation flags like -nostdinc which Kbuild forces on everything.

*) Rather than $(CFLAGS_$(notdir $@)), which expands to CFLAGS_anObj.s when
   building "anObj.s", use $(CFLAGS_$(*F).o) which always accesses
   CFLAGS_anObj.o, like done by Kbuild.

*) Make c_flags apply to all targets having the same basename, rather than
   listing .s, .i, .lst and .o, with the use (which I tested) of

	$(USER_OBJS:.o=.%): c_flags = ...

and of

 -      $(obj)/unmap.c: _c_flags = ...
 +      $(obj)/unmap.%: _c_flags = ...

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-05-01 18:17:45 -07:00