| Commit message (Collapse) | Author | Age |
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
sparc64: Fix crash with /proc/iomem
sparc64: Reschedule KGDB capture to a software interrupt.
sbus: Auto-load openprom module when device opened.
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When you compile kernel on Sparc64 with heap memory checking and type
"cat /proc/iomem", you get a crash, because pointers in struct
resource are uninitialized.
Most code fills struct resource with zeros, so I assume that it is
responsibility of the caller of request_resource to initialized it,
not the responsibility of request_resource functuion.
After 2.6.29 is out, there could be a check for uninitialized fields
added to request_resource to avoid crashes like this.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Otherwise it might interrupt switch_to() midstream and use
half-cooked register window state.
Reported-by: Chris Torek <chris.torek@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/galak/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/powerpc:
powerpc/mm: Fix Respect _PAGE_COHERENT on classic ppc32 SW TLB load machines
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Grant picked up the wrong version of "Respect _PAGE_COHERENT on classic
ppc32 SW" (commit a4bd6a93c3f14691c8a29e53eb04dc734b27f0db)
It was missing the code to actually deal with the fixup of
_PAGE_COHERENT based on the CPU feature.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu
* 'fix-includes' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
m68k: merge the non-MMU and MMU versions of siginfo.h
m68k: use the MMU version of unistd.h for all m68k platforms
m68k: merge the non-MMU and MMU versions of signal.h
m68k: merge the non-MMU and MMU versions of ptrace.h
m68k: use MMU version of setup.h for both MMU and non-MMU
m68k: merge the non-MMU and MMU versions of sigcontext.h
m68k: merge the non-MMU and MMU versions of swab.h
m68k: merge the non-MMU and MMU versions of param.h
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It is trivial to merge the non-MMU and MMU versions of siginfo.h.
Without a single file "make headers_install" is broken for m68k
(since each of the sub-varients of siginfo.h are not installed).
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
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The MMU version of unistd.h can be use on non-MMU platrorms as well.
Without a single file "make headers_install" is broken for m68k
(since each of the sub-varients of unistd.h are not installed).
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
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It is trivial to merge the non-MMU and MMU versions of signal.h.
Without a single file "make headers_install" is broken for m68k
(since each of the sub-varients of signal.h are not installed).
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
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It is trivial to merge the non-MMU and MMU versions of ptrace.h.
Without a single file "make headers_install" is broken for m68k
(since each of the sub-varients of ptrace.h are not installed).
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
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The MMU version of setup.h can be used for all m68k platforms.
Without a single file "make headers_install" is broken for m68k
(since each of the sub-varients of setup.h are not installed).
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
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It is trivial to merge the non-MMU and MMU versions of sigcontext.h.
Without a single file "make headers_install" is broken for m68k
(since each of the sub-varients of sigconext.h are not installed).
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
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It is trivial to merge the non-MMU and MMU versions of swab.h.
Without a single file "make headers_install" is broken for m68k
(since each of the sub-varients of swab.h are not installed).
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
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It is trivial to merge the non-MMU and MMU versions of param.h.
Without a single file "make headers_install" is broken for m68k
(since each of the sub-varients of param.h are not installed).
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
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* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
[S390] make page table upgrade work again
[S390] make page table walking more robust
[S390] Dont check for pfn_valid() in uaccess_pt.c
[S390] ftrace/mcount: fix kernel stack backchain
[S390] topology: define SD_MC_INIT to fix performance regression
[S390] __div64_31 broken for CONFIG_MARCH_G5
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After TASK_SIZE now gives the current size of the address space the
upgrade of a 64 bit process from 3 to 4 levels of page table needs
to use the arch_mmap_check hook to catch large mmap lengths. The
get_unmapped_area* functions need to check for -ENOMEM from the
arch_get_unmapped_area*, upgrade the page table and retry.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Make page table walking on s390 more robust. The current code requires
that the pgd/pud/pmd/pte loop is only done for address ranges that are
below the end address of the last vma of the address space. But this
is not always true, e.g. the generic page table walker does not guarantee
this. Change TASK_SIZE/TASK_SIZE_OF to reflect the current size of the
address space. This makes the generic page table walker happy but it
breaks the upgrade of a 3 level page table to a 4 level page table.
To make the upgrade work again another fix is required.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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pfn_valid() actually checks for a valid struct page and not for a
valid pfn. Using xip mappings w/o struct pages, this will result in
-EFAULT returned by the (page table walk) user copy functions,
even though there is valid memory. Those user copy functions don't
need a struct page, so this patch just removes the pfn_valid() check.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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With packed stack the backchain is at a different location.
Just use __SF_BACKCHAIN as an offset to store the backchain.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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The default values for SD_MC_INIT cause an additional cpu usage of up
to 40% on some network benchmarks compared to the plain SD_CPU_INIT
values. So just define SD_MC_INIT to SD_CPU_INIT.
More tuning needs to be done.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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The implementation of __div64_31 for G5 machines is broken. The comments
in __div64_31 are correct, only the code does not do what the comments
say. The part "If the remainder has overflown subtract base and increase
the quotient" is only partially realized, the base is subtracted correctly
but the quotient is only increased if the dividend had the last bit set.
Using the correct instruction fixes the problem.
Cc: stable@kernel.org
Reported-by: Frans Pop <elendil@planet.nl>
Tested-by: Frans Pop <elendil@planet.nl>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
powerpc/ps3: ps3_defconfig updates
powerpc/mm: Respect _PAGE_COHERENT on classic ppc32 SW
powerpc/5200: Enable CPU_FTR_NEED_COHERENT for MPC52xx
ps3/block: Replace mtd/ps3vram by block/ps3vram
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Update ps3_defconfig.
Sets these options:
CONFIG_PS3_VRAM=m
CONFIG_BLK_DEV_DM=m
CONFIG_USB_HIDDEV=y
CONFIG_EXT4_FS=y
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Since we now set _PAGE_COHERENT in the Linux PTE we shouldn't be clearing
it out before we setup the SW TLB. Today all the SW TLB machines
(603/e300) that we support are non-SMP, however there are some errata on
some devices that cause us to set _PAGE_COHERENT via CPU_FTR_NEED_COHERENT.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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BestComm, a DMA engine in MPC52xx SoC, requires snooping when
CPU caches are enabled to work properly.
Adding CPU_FTR_NEED_COHERENT fixes NFS problems on MPC52xx machines
introduced by 'powerpc/mm: Fix handling of _PAGE_COHERENT in BAT setup
code' (sha1: 4c456a67f501b8b15542c7c21c28812bf88f484b).
Signed-off-by: Piotr Ziecik <kosmo@semihalf.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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Convert the PS3 Video RAM Storage Driver from an MTD driver to a plain block
device driver.
The ps3vram driver exposes unused video RAM on the PS3 as a block device
suitable for storage or swap. Fast data transfer is achieved using a local
cache in system RAM and DMA transfers via the GPU.
The new driver is ca. 50% faster for reading, and ca. 10% for writing.
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Don't boost at the addresses which are listed on exception tables,
because major page fault will occur on those addresses. In that case,
kprobes can not ensure that when instruction buffer can be freed since
some processes will sleep on the buffer.
kprobes-ia64 already has same check.
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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In order for ntpd to correctly synchronize the clocks, the frequency of
the system clock must not be off by more than 500 ppm (or, put another
way, 1:2000), or ntpd will end up giving up on trying to synchronize
properly, and ends up reseting the clock in jumps instead.
The fast TSC PIT calibration sometimes failed this test - it was
assuming that the PIT reads always took about one microsecond each (2us
for the two reads to get a 16-bit timer), and that calibrating TSC to
the PIT over 15ms should thus be sufficient to get much closer than
500ppm (max 2us error on both sides giving 4us over 15ms: a 270 ppm
error value).
However, that assumption does not always hold: apparently some hardware
is either very much slower at reading the PIT registers, or there was
other noise causing at least one machine to get 700+ ppm errors.
So instead of using a fixed 15ms timing loop, this changes the fast PIT
calibration to read the TSC delta over the individual PIT timer reads,
and use the result to calculate the error bars on the PIT read timing
properly. We then successfully calibrate the TSC only if the maximum
error bars fall below 500ppm.
In the process, we also relax the timing to allow up to 25ms for the
calibration, although it can happen much faster depending on hardware.
Reported-and-tested-by: Jesper Krogh <jesper@krogh.cc>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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During bootup, when we reprogram the PIT (programmable interval timer)
to start counting down from 0xffff in order to use it for the fast TSC
calibration, we should also make sure to delay a bit afterwards to allow
the PIT hardware to actually start counting with the new value.
That will happens at the next CLK pulse (1.193182 MHz), so the easiest
way to do that is to just wait at least one microsecond after
programming the new PIT counter value. We do that by just reading the
counter value back once - which will take about 2us on PC hardware.
Reported-and-tested-by: john stultz <johnstul@us.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* master.kernel.org:/home/rmk/linux-2.6-arm: (23 commits)
[ARM] Fix virtual to physical translation macro corner cases
[ARM] update mach-types
[ARM] 5421/1: ftrace: fix crash due to tracing of __naked functions
MX1 fix include
[ARM] 5419/1: ep93xx: fix build warnings about struct i2c_board_info
[ARM] 5418/1: restore lr before leaving mcount
ARM: OMAP: board-omap3beagle: set i2c-3 to 100kHz
ARM: OMAP: Allow I2C bus driver to be compiled as a module
ARM: OMAP: sched_clock() corrected
ARM: OMAP: Fix compile error if pm.h is included
[ARM] orion5x: pass dram mbus data to xor driver
[ARM] S3C64XX: Fix s3c64xx_setrate_clksrc
[ARM] S3C64XX: sparse warnings in arch/arm/plat-s3c64xx/irq.c
[ARM] S3C64XX: sparse warnings in arch/arm/plat-s3c64xx/s3c6400-clock.c
[ARM] S3C64XX: Fix USB host clock mux list
[ARM] S3C64XX: Fix name of USB host clock.
[ARM] S3C64XX: Rename IRQ_UHOST to IRQ_USBH
[ARM] S3C64XX: Do gpiolib configuration earlier
[ARM] S3C64XX: Staticise s3c64xx_init_irq_eint()
[ARM] SMDK6410: Declare iodesc table static
...
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The current use of these macros works well when the conversion is
entirely linear. In this case, we can be assured that the following
holds true:
__va(p + s) - s = __va(p)
However, this is not always the case, especially when there is a
non-linear conversion (eg, when there is a 3.5GB hole in memory.)
In this case, if 's' is the size of the region (eg, PAGE_SIZE) and
'p' is the final page, the above is most definitely not true.
So, we must ensure that __va() and __pa() are only used with valid
kernel direct mapped RAM addresses. This patch tweaks the code
to achieve this.
Tested-by: Charles Moschel <fred99@carolina.rr.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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This is a fix for the following crash observed in 2.6.29-rc3:
http://lkml.org/lkml/2009/1/29/150
On ARM it doesn't make sense to trace a naked function because then
mcount is called without stack and frame pointer being set up and there
is no chance to restore the lr register to the value before mcount was
called.
Reported-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Tested-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Cc: Abhishek Sagar <sagar.abhishek@gmail.com>
Cc: Steven Rostedt <rostedt@home.goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Includes missed irqs.h in devices.c and mx1ads.c.
Signed-off-by: Darius Augulis <augulis.darius@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6
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Changing it do 100kHz is needed to make more devices works properly. Controlling the
TI DLP Pico projector[1] doesn't work properly at 400kHz, 100kHz and lower work fine.
EDID readout is unaffected by this change.
[1] http://focus.ti.com/dlpdmd/docs/dlpdiscovery.tsp?sectionId=60&tabId=2234
Signed-off-by: Koen Kooi <koen@beagleboard.org>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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Fixes a linker error when OMAP I2C bus driver is compiled as a module:
ERROR: "i2c_register_board_info" [arch/arm/plat-omap/i2c.ko] undefined!
The I2C utility functions used for board initialization should be always
built-in.
Signed-off-by: Aaro Koskinen <Aaro.Koskinen@nokia.com>
Acked-by: Jarkko Nikula <jarkko.nikula@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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After my OMAP3 board has been running for a while, I'm seeing weird
latency traces like this:
sh-1574 0d.h2 153us : do_timer (tick_do_update_jiffies64)
sh-1574 0d.h2 153us : update_wall_time (do_timer)
sh-1574 0d.h2 153us!: omap_32k_read (update_wall_time)
sh-1574 0d.h2 1883us : update_xtime_cache (update_wall_time)
sh-1574 0d.h2 1883us : clocksource_get_next (update_wall_time)
sh-1574 0d.h2 1883us+: _spin_lock_irqsave (clocksource_get_next)
and after a while:
sh-17818 0d.h3 153us : do_timer (tick_do_update_jiffies64)
sh-17818 0d.h3 153us : update_wall_time (do_timer)
sh-17818 0d.h3 153us!: omap_32k_read (update_wall_time)
sh-17818 0d.h3 1915us : update_xtime_cache (update_wall_time)
sh-17818 0d.h3 1915us+: clocksource_get_next (update_wall_time)
sh-17818 0d.h3 1945us : _spin_lock_irqsave (clocksource_get_next)
Turns out that sched_clock() is using cyc2ns(), which returns NTP
adjusted time. The sched_clock() frequency should not be adjusted. The
patch deletes omap_32k_ticks_to_nsecs() and rewrites sched_clock()
to do the conversion using the constant multiplier.
Signed-off-by: Aaro Koskinen <Aaro.Koskinen@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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Change the error to a warning.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into s3c-fixes
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Some of the rate selection logic in s3c64xx_setrate_clksrc uses what
appears to be parent clock selection logic. This patch corrects it.
I also added a check for overly large dividers to prevent them from
changing unrelated clocks.
Signed-off-by: Werner Almesberger <werner@openmoko.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Fix the following sparse warnings in arch/arm/plat-s3c64xx/irq.c
arch/arm/plat-s3c64xx/irq.c:210:23: warning: incorrect type in initializer (different address spaces)
arch/arm/plat-s3c64xx/irq.c:210:23: expected void *reg_base
arch/arm/plat-s3c64xx/irq.c:210:23: got void [noderef] <asn:2>*regs
arch/arm/plat-s3c64xx/irq.c:215:2: warning: incorrect type in argument 1 (different address spaces)
arch/arm/plat-s3c64xx/irq.c:215:2: expected void const volatile [noderef] <asn:2>*<noident>
arch/arm/plat-s3c64xx/irq.c:215:2: got void *
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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Fix the following sparse warnings in s3c6400-clock.c:
39:12: warning: symbol 'clk_ext_xtal_mux' was not declared. Should it be static?
66:12: warning: symbol 'clk_fout_apll' was not declared. Should it be static?
81:19: warning: symbol 'clk_mout_apll' was not declared. Should it be static?
91:12: warning: symbol 'clk_fout_epll' was not declared. Should it be static?
106:19: warning: symbol 'clk_mout_epll' was not declared. Should it be static?
126:19: warning: symbol 'clk_mout_mpll' was not declared. Should it be static?
148:12: warning: symbol 'clk_dout_mpll' was not declared. Should it be static?
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
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