Russell King [Mon, 8 Jan 2007 19:49:12 +0000 (19:49 +0000)]
[ARM] Provide basic printk_clock() implementation
Current sched_clock() implementations on ARM cause unbootable kernels
with PRINTK_TIME support enabled. To avoid this, provide a basic
printk_clock() implementation which avoids sched_clock() being called
before the page tables have been set up.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Sat, 30 Dec 2006 23:17:40 +0000 (23:17 +0000)]
[ARM] Resolve fuse and direct-IO failures due to missing cache flushes
fuse does not work on ARM due to cache incoherency issues - fuse wants
to use get_user_pages() to copy data from the current process into
kernel space. However, since this accesses userspace via the kernel
mapping, the kernel mapping can be out of date wrt data written to
userspace.
This can lead to unpredictable behaviour (in the case of fuse) or data
corruption for direct-IO.
This resolves debian bug #402876
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Sat, 30 Dec 2006 22:24:19 +0000 (22:24 +0000)]
[ARM] pass vma for flush_anon_page()
Since get_user_pages() may be used with processes other than the
current process and calls flush_anon_page(), flush_anon_page() has to
cope in some way with non-current processes.
It may not be appropriate, or even desirable to flush a region of
virtual memory cache in the current process when that is different to
the process that we want the flush to occur for.
Therefore, pass the vma into flush_anon_page() so that the architecture
can work out whether the 'vmaddr' is for the current process or not.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Mon, 8 Jan 2007 16:42:51 +0000 (16:42 +0000)]
[ARM] Fix potential MMCI bug
The MMCI driver might end up aborting the initial command and leaving
the data part of the command sequence still in place. Avoid this
problem by ensuring that any data sequence is properly cleared out
when a command completes.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
If the kernel attempts to execute a CP1 or CP2 instruction and it
aborts, and a FP emulator is not loaded, we try to return as if to
a user context, instead of the proper kernel context. Since the
fault came from kernel mode, we must use the kernel return paths.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
[SOUND] Sparc CS4231: Use 64 for period_bytes_min
[SOUND] Sparc CS4231: Fix IRQ return value and initialization.
Gerrit Renker [Thu, 4 Jan 2007 20:25:16 +0000 (12:25 -0800)]
[TCP]: Use old definition of before
This reverts the new (unambiguous) definition of the TCP `before'
relation. As pointed out in an example by Herbert Xu, there is
existing code which implicitly requires the old definition in order
to work correctly.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
Chuck Ebbert [Thu, 4 Jan 2007 20:17:44 +0000 (12:17 -0800)]
[NETFILTER]: ebtables: don't compute gap before checking struct type
We cannot compute the gap until we know we have a 'struct ebt_entry' and
not 'struct ebt_entries'. Failure to check can cause crash.
Tested-by: Santiago Garcia Mantinan <manty@manty.net> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
[NETFILTER]: nf_nat: fix MASQUERADE crash on device down
Check the return value of nfct_nat() in device_cmp(), we might very well
have non NAT conntrack entries as well (Netfilter bugzilla #528).
Signed-off-by: Martin Josefsson <gandalf@wlug.westbo.se> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Patrick McHardy [Thu, 4 Jan 2007 20:15:34 +0000 (12:15 -0800)]
[NETFILTER]: Fix routing of REJECT target generated packets in output chain
Packets generated by the REJECT target in the output chain have a local
destination address and a foreign source address. Make sure not to use
the foreign source address for the output route lookup.
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Jiri Kosina [Wed, 3 Jan 2007 22:03:14 +0000 (23:03 +0100)]
HID: fix help texts in Kconfig
The help text for CONFIG_HID might imply for someone that
it's necessary to enable it for any keyboard or mouse
attached to the system. This is obviously not correct, so
fix it to avoid confusing the users.
This patch adds support for a few more PHYs used by Apple and fixes
advertising and detecting of Pause (we were missing setting the bit in
MII_ADVERTISE and weren't testing in LPA for all PHYs).
Note that I currently only advertise pause, not asymetric pause. I
don't know for sure the details there, I suppose I should read a bit
more 802.3 references, and I don't now what sungem is capable of, but
I noticed the PCS code (originated from you) does the same.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart:
[AGPGART] drivers/char/agp/sgi-agp.c: check kmalloc() return value
[AGPGART] Fix PCI-posting flush typo.
[AGPGART] fix detection of aperture size versus GTT size on G965
[AGPGART] Remove unnecessary flushes when inserting and removing pages.
[AGPGART] K8M890 support for amd-k8.
* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq:
[CPUFREQ] longhaul: Kill off warnings introduced by recent changes.
[CPUFREQ] Uninitialized use of cmd.val in arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c:acpi_cpufreq_target()
[CPUFREQ] Longhaul - Always guess FSB
[CPUFREQ] Longhaul - Fix up powersaver assumptions.
[CPUFREQ] longhaul: Fix up unreachable code.
[CPUFREQ] speedstep-centrino: missing space and bracket
[CPUFREQ] Bug fix for acpi-cpufreq and cpufreq_stats oops on frequency change notification
[CPUFREQ] select consistently
Jens Axboe [Wed, 3 Jan 2007 17:15:20 +0000 (18:15 +0100)]
[PATCH] ide-cd maintainer
Alan agreed to take over casual maintenance of the ide-cd atapi cdrom
driver, so I'm happy to sign it over to him. Alan, I hope the address is
the one you want to use. I also changed the list to linux-ide as that
seems more appropriate.
Jens Axboe [Wed, 3 Jan 2007 07:10:35 +0000 (08:10 +0100)]
[PATCH] cdrom: set default timeout to 7 seconds
It's a known fact that Windows times out commands after 7 seconds, so
drives generally try and respond if they can before that happens. We
default to 5 seconds, which sometimes is a bit too short.
Jeremy Higdon reported here:
http://lkml.org/lkml/2007/1/1/145
that his drive takes longer than 5 seconds for a "read track
information" command, later confirming that it is about 6.7 seconds.
So just do the sane thing and change the default command timeout to 7
seconds to avoid other surprises.
Rafa³ Bilski [Mon, 1 Jan 2007 22:49:34 +0000 (23:49 +0100)]
[CPUFREQ] Longhaul - Always guess FSB
This is patch that solves Ebox mini PC issue and make
FSB code more specification compilant. At start guess_fsb
function is guessing 200MHz FSB too. It is better to
make it in this way because, thanks to this function, driver
will fail for bogus FSB values caused by bogus multiplier
value. For PowerSaver processors we can't depend on Max /
MinMHzFSB because these values are only used for
PowerSaver 2.0 and 3.0. Most processors on which Longhaul
is used are PowerSaver 1.0 only. I'm changing code for older
CPU's too, but not so much as previously, and this code was
already used for Ezra. Using MinMHzBR for Ezra-T is outside
spec. It is for voltage scaling purpose and don't have to
be equal to minmult (but it is). Same for Nehemiah (it
isn't for sure). Added mult - current multiplier value.
Signed-off-by: Rafa³ Bilski <rafalbilski@interia.pl> Signed-off-by: Dave Jones <davej@redhat.com>
Philipp Zabel [Tue, 2 Jan 2007 20:06:57 +0000 (21:06 +0100)]
[ARM] 4081/1: Add definition for TI Sync Serial Protocol
Of the possible SSP frame formats (FRF bits in SSCR0), only SSCR0_PSP is defined. Other possible formats are Motorola SPI (0<<4), TI SSP (1<<4) and Microwire (2<<4). Attached patch adds a definition SSCR0_TISSP.
This mode is used for the sound codec attached to the PXA272 SSP1 of some HTC PDA phones.
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Philipp Zabel [Tue, 2 Jan 2007 19:59:38 +0000 (20:59 +0100)]
[ARM] 4080/1: Fix for the SSCR0_SlotsPerFrm macro
The SSCR0_SlotsPerFrm macro writes a 3-bit value to bits [2:0], while the correct location of FRDC in SSCR0 is at bits [26:24]. This patch adds the missing "<< 24".
Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
[PATCH] Fix insta-reboot with "i386: Relocatable kernel support"
Commit 968de4f02621db35b8ae5239c8cfc6664fb872d8 ("i386: Relocatable
kernel support") caused problems for people with old binutils versions
that didn't mark ".text.*" sections automatically allocated.
So we should use .section command to specifically mark .text.head
section as AX (allocatable and executable) to solve the problem.
This should be unnecessary with binutils 2.15 and later, which is
already three years old, but it doesn't hurt supporting older toolchains
where possible.
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Acked-by: Jean Delvare <khali@linux-fr.org> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
do not call a sleeping lock API in an RCU read section.
lock_sock_nested can sleep, its BH counterpart doesn't.
selinux_netlbl_inode_permission() needs to use the BH counterpart
unconditionally.
Compile tested.
From: Ingo Molnar <mingo@elte.hu>
added BH disabling, because this function can be called from non-atomic
contexts too, so a naked bh_lock_sock() would be deadlock-prone.
Jens Axboe [Tue, 2 Jan 2007 17:32:11 +0000 (18:32 +0100)]
[PATCH] cfq-iosched: merging problem
Two issues:
- The final return 1 should be a return 0, otherwise comparing cfqq is
a noop.
- bio_sync() only checks the sync flag, while rq_is_sync() checks both
for READ and sync. The latter is what we want. Expand the bio check
to include reads, and relax the restriction to allow merging of async
io into sync requests.
In the future we want to clean up the SYNC logic, right now it means
both sync request (such as READ and O_DIRECT WRITE) and unplug-on-issue.
Leave that for later.
Alan [Tue, 2 Jan 2007 11:58:34 +0000 (11:58 +0000)]
[PATCH] libata: fix combined mode
This is a slight variant on the patch I posted December 16th to fix
libata combined mode handling. The only real change is that we now
correctly also reserve BAR1,2,4. That is basically a neatness issue.
Jeff was unhappy about two things
1. That it didn't work in the case of one channel native one channel
legacy.
This is a silly complaint because the SFF layer in libata doesn't handle
this case yet anyway.
2. The case where combined mode is in use and IDE=n.
In this case the libata quirk code reserves the resources in question
correctly already.
Once the combined mode stuff is redone properly (2.6.21) then the entire
mess turns into a single pci_request_regions() for all cases and all the
ugly resource hackery goes away.
I'm sending this now rather than after running full test suites so that
it can get the maximal testing in a short time. I'll be running tests on
this after lunch.
Signed-off-by: Alan Cox <alan@redhat.com> Cc: Jeff Garzik <jgarzik@pobox.com> Acked-by: Alessandro Suardi <alessandro.suardi@gmail.com> Acked-by: Theodore Tso <tytso@mit.edu> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Len Brown [Thu, 21 Dec 2006 06:29:59 +0000 (01:29 -0500)]
ACPI: fix section mis-match build warning
Dunno why this pops out in only in the allmodconfig build.
Though the warning is accurate, all the callers of the flagged
non __init function are __init, this is not a functional change.
WARNING: vmlinux - Section mismatch: reference to .init.data:acpi_sci_flags from .text between 'acpi_sci_ioapic_setup' (at offset 0xc010f0a
6) and 'acpi_gsi_to_irq' WARNING: vmlinux - Section mismatch: reference to .init.text:mp_override_legacy_irq from .text between 'acpi_sci_ioapic_setup' (at offset 0
xc010f0de) and 'acpi_gsi_to_irq' WARNING: vmlinux - Section mismatch: reference to .init.data:acpi_sci_override_gsi from .text between 'acpi_sci_ioapic_setup' (at offset 0x c010f0e4) and 'acpi_gsi_to_irq'
* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6:
[SPARC64]: Handle ISA devices with no 'regs' property.
[SPARC64]: Update defconfig.
[SPARC64]: Fix of_iounmap() region release.
[SPARC64]: Fix "mem=xxx" handling.
Martin Willi [Fri, 29 Dec 2006 05:27:48 +0000 (21:27 -0800)]
[XFRM]: Algorithm lookup using .compat name
Installing an IPsec SA using old algorithm names (.compat) does not work
if the algorithm is not already loaded. When not using the PF_KEY
interface, algorithms are not preloaded in xfrm_probe_algs() and
installing a IPsec SA fails.
Signed-off-by: Martin Willi <martin@strongswan.org> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Don't add it there please; add it lower down inside the existing #ifdef
__KERNEL__. You just made the _userspace_ net.h include random.h, which
then fails to compile unless <asm/types.h> was already included.
Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Fri, 29 Dec 2006 05:14:52 +0000 (21:14 -0800)]
[NET]: Add memory barrrier to netif_poll_enable()
When a driver writer calls this, they generally expect that
all previous stores and modifications they've made will be
visible before netif_poll_enable() executes, so ensure this.
Noticed by Ben H.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Fri, 29 Dec 2006 05:00:23 +0000 (21:00 -0800)]
[SPARC64]: Fix "mem=xxx" handling.
We were not being careful enough. When we trim the physical
memory areas, we have to make sure we don't remove the kernel
image or initial ramdisk image ranges.
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Sat, 30 Dec 2006 20:02:53 +0000 (12:02 -0800)]
Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2:
ocfs2: export heartbeat thread pid via configfs
ocfs2: always unmap in ocfs2_data_convert_worker()
ocfs2: ignore NULL vfsmnt in ocfs2_should_update_atime()
ocfs2: Allow direct I/O read past end of file
ocfs2: don't print error in ocfs2_permission()
Linus Torvalds [Sat, 30 Dec 2006 19:40:40 +0000 (11:40 -0800)]
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6:
ieee1394: sbp2: fix bogus dma mapping
ieee1394: sbp2: pass REQUEST_SENSE through to the target
Jan Andersson [Sat, 30 Dec 2006 00:50:04 +0000 (16:50 -0800)]
[PATCH] sparc32: add offset in pci_map_sg()
Add sg->offset to sg->dvma_address in pci_map_sg() on sparc32. Without the
offset, transfers to buffers that do not begin on a page boundary will not
work as expected.
Signed-off-by: Jan Andersson <jan.andersson@ieee.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: William Lee Irwin III <wli@holomorphy.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Avi Kivity [Sat, 30 Dec 2006 00:49:58 +0000 (16:49 -0800)]
[PATCH] KVM: Fix oops on oom
__free_page() doesn't like a NULL argument, so check before calling it. A
NULL can only happen if memory is exhausted during allocation of a memory
slot.
Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
The latest version of kvm doesn't initialize kvm_arch_ops in kvm_init(), which
causes an error with the following sequence.
1. Load the supported arch's module.
2. Load the unsupported arch's module.\e$B!!\e(B(loading error)
3. Unload the unsupported arch's module.
You'll get the following error message after step 3. "BUG: unable to handle
to handle kernel paging request at virtual address xxxxxxxx"
The problem here is that the unsupported arch's module overwrites kvm_arch_ops
of the supported arch's module at step 2.
This patch initializes kvm_arch_ops upon loading architecture specific kvm
module, and prevents overwriting kvm_arch_ops when kvm_arch_ops is already set
correctly.
Signed-off-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Sergei Shtylyov [Sat, 30 Dec 2006 00:49:18 +0000 (16:49 -0800)]
[PATCH] PIIX: remove check for broken MW DMA mode 0
There's no need to check in piix_config_drive_for_dma() for broken MW DMA
mode 0 as this mode is not supported by the driver (it sets
hwif->mwdma_mask to 0x6), and hence can't be selected by ide_dma_speed().
(Alan sayeth "Probably right but if not you've got a subtle corruptor. Should
at least stick a BUG_ON mode 0 setting right close when the mode is set.")
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Andrew Morton [Sat, 30 Dec 2006 00:49:14 +0000 (16:49 -0800)]
[PATCH] lockdep: printk warning fix
kernel/lockdep.c: In function `lookup_chain_cache':
kernel/lockdep.c:1339: warning: long long unsigned int format, u64 arg (arg 2)
kernel/lockdep.c:1344: warning: long long unsigned int format, u64 arg (arg 2)
Russel King recently reminded us that one shouldn't use asm/arch/hardware.h
but one should use asm/hardware.h. Unfortunately, the spi_s3c24xx_gpio
driver is using the wrong header. This patch is fixing that.
Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Mike Frysinger [Sat, 30 Dec 2006 00:49:07 +0000 (16:49 -0800)]
[PATCH] respect srctree/objtree in Documentation/DocBook/Makefile
The KERNELDOC and DOCPROC variables are relative to the
$(srctree)/$(objtree) and expect to be run only from there ... attached
patch adds proper srctree/objtree prefixes to both variables.
Andrew Morton [Sat, 30 Dec 2006 00:49:04 +0000 (16:49 -0800)]
[PATCH] cpuset procfs warning fix
fs/proc/base.c:1869: warning: initialization discards qualifiers from pointer target type
fs/proc/base.c:2150: warning: initialization discards qualifiers from pointer target type
Cc: Paul Jackson <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Kyungmin Park [Sat, 30 Dec 2006 00:48:56 +0000 (16:48 -0800)]
[PATCH] ARM: OMAP: fix missing header on apollon board
Fix apollon board compiler error
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Kyungmin Park [Sat, 30 Dec 2006 00:48:51 +0000 (16:48 -0800)]
[PATCH] ARM: OMAP: fix GPMC compiler errors
Fix GPMC compiler errors on OMAP2
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
David Brownell [Sat, 30 Dec 2006 00:48:47 +0000 (16:48 -0800)]
[PATCH] SPI/MTD: mtd_dataflash oops prevention
Return a fault code if the Dataflash driver runs into a "no device present"
error when the MISO line has a pulldown (it currently expects a pullup), so
that rmmod won't oops.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
David Brownell [Sat, 30 Dec 2006 00:48:39 +0000 (16:48 -0800)]
[PATCH] SPI: define null tx_buf to mean "shift out zeroes"
Some issues were recently turned up with the current specification of what
it means for spi_transfer.tx_buf to be null, as part of transfers which are
(from the SPI protocol driver perspective) pure reads.
Specifically, that it seems better to change the TX behaviour there from
"undefined" to "will shift zeroes". This lets protocol drivers (like the
ads7846 driver) depend on that behavior. It's what most controller drivers
in the tree are already doing (with one exception and one case of driver
wanting-to-oops), it's what Microwire hardware will necessarily be doing,
and it removes an issue whereby certain security audits would need to
define such a value anyway as part of removing covert channels.
This patch changes the specification to require shifting zeroes, and
updates all currently merged SPI controller drivers to do so.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
[PATCH] MM: SLOB is broken by recent cleanup of slab.h
Recent cleanup of slab.h broke SLOB allocator: the routine kmem_cache_init
has now the __init attribute for both slab.c and slob.c. This routine
cannot be removed after init in the case of slob.c -- it serves as a timer
callback.
Provide a separate timer callback routine, call it once from kmem_cache_init,
keep the __init attribute on the latter.
Signed-off-by: Dimitri Gorokhovik <dimitri.gorokhovik@free.fr> Cc: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Ingo Molnar [Sat, 30 Dec 2006 00:48:13 +0000 (16:48 -0800)]
[PATCH] sched: fix cond_resched_softirq() offset
Remove the __resched_legal() check: it is conceptually broken. The biggest
problem it had is that it can mask buggy cond_resched() calls. A
cond_resched() call is only legal if we are not in an atomic context, with
two narrow exceptions:
- if the system is booting
- a reacquire_kernel_lock() down() done while PREEMPT_ACTIVE is set
But __resched_legal() hid this and just silently returned whenever
these primitives were called from invalid contexts. (Same goes for
cond_resched_locked() and cond_resched_softirq()).
Furthermore, the __legal_resched(0) call was buggy in that it caused
unnecessarily long softirq latencies via cond_resched_softirq(). (which is
only called from softirq-off sections, hence the code did nothing.)
The fix is to resurrect the efficiency of the might_sleep checks and to
only allow the narrow exceptions.
include/linux/utsrelease.h and include/linux/version.h aren't removed any
more by mrproper in kernel 2.6.20-rc2. The patch below fixes this.
The definition of MRPROPER_FILES looks weird: generated-headers looks like
a misspelling of generated_headers, but that one is a Makefile target, not
a variable or a file, so I don't see how including it in MRPROPER_FILES
could have any effect.
Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Tilman Schmidt [Sat, 30 Dec 2006 00:48:03 +0000 (16:48 -0800)]
[PATCH] Update to Documentation/tty.txt on line disciplines
While trying to develop a line discipline I found a couple of things worth
mentioning in Documentation/tty.txt which weren't, so I decided to add
them. It would be nice if someone more knowledgeable than me in that area
would look over them, in case I got something wrong.
Signed-off-by: Tilman Schmidt <tilman@imap.cc> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
projects / linux-2.6-omap-h63xx.git / log