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Only make swapper_pg_dir readonly and pinned when generic x86 architecture code
(which also starts on initial_page_table) switches to it. This helps ensure
that the generic setup paths work on Xen unmodified. In particular
clone_pgd_range writes directly to the destination pgd entries and is used to
initialise swapper_pg_dir so we need to ensure that it remains writeable until
the last possible moment during bring up.
This is complicated slightly by the need to avoid sharing kernel PMD entries
when running under Xen, therefore the Xen implementation must make a copy of
the kernel PMD (which is otherwise referred to by both intial_page_table and
swapper_pg_dir) before switching to swapper_pg_dir.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch/tile: fix memchr() not to dereference memory for zero length
arch/tile: make glibc's sysconf(_SC_NPROCESSORS_CONF) work correctly
arch/tile: fix rwlock so would-be write lockers don't block new readers
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This change fixes a bug that memchr() will read the first word
of the source even if the length is zero. Ironically, the code
was originally written with a test to avoid exactly this problem,
but to make the code conform to Linux coding standards with all
declarations preceding all statements, the first load from memory
was moved up above that test as the initial value for a variable.
The change just moves all the variable declarations to the top
of the file, with no initializers, so that the test can also be
at the top of the file.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
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glibc assumes that it can count /sys/devices/system/cpu/cpu* to get
the number of configured cpus. For this to be valid on tile, we need
to generate a "cpu" entry for all cpus, including the ones that are
not currently allocated for Linux's use.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
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This avoids a deadlock in the IGMP code where one core gets a read
lock, another core starts trying to get a write lock (thus blocking
new readers), and then the first core tries to recursively re-acquire
the read lock.
We still try to preserve some degree of balance by giving priority
to additional write lockers that come along while the lock is held
for write, so they can all complete quickly and return the lock to
the readers.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
* 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
pci root complex: support for tile architecture
drivers/net/tile/: on-chip network drivers for the tile architecture
MAINTAINERS: add drivers/char/hvc_tile.c as maintained by tile
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This change enables PCI root complex support for TILEPro. Unlike
TILE-Gx, TILEPro has no support for memory-mapped I/O, so the PCI
support consists of hypervisor upcalls for PIO, DMA, etc. However,
the performance is fine for the devices we have tested with so far
(1Gb Ethernet, SATA, etc.).
The <asm/io.h> header was tweaked to be a little bit more aggressive
about disabling attempts to map/unmap IO port space. The hacky
<asm/pci-bridge.h> header was rolled into the <asm/pci.h> header
and the result was simplified. Both of the latter two headers were
preliminary versions not meant for release before now - oh well.
There is one quirk for our TILEmpower platform, which accidentally
negotiates up to 5GT and needs to be kicked down to 2.5GT.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
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This change adds the first network driver for the tile architecture,
supporting the on-chip XGBE and GBE shims.
The infrastructure is present for the TILE-Gx networking drivers (another
three source files in the new directory) but for now the the actual
tilegx sources are waiting on releasing hardware to initial customers.
Note that arch/tile/include/hv/* are "upstream" headers from the
Tilera hypervisor and will probably benefit less from LKML review.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
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Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
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* master.kernel.org:/home/rmk/linux-2.6-arm:
ARM: 6482/2: Fix find_next_zero_bit and related assembly
ARM: 6490/1: MM: bugfix: initialize spinlock for init_mm.context
ARM: avoid annoying <4>'s in printk output
SCSI: arm fas216: fix missing ';'
ARM: avoid marking decompressor .stack section as having contents
ARM: 6489/1: thumb2: fix incorrect optimisation in usracc
ARM: 6488/1: nomadik: prevent sched_clock() wraparound
ARM: 6484/1: fix compile warning in mm/init.c
ARM: 6473/1: Small update to ux500 specific L2 cache code
ARM: improve compiler's ability to optimize page tables
mx25: fix spi device registration typo
ARM i.MX27 eukrea: Fix compilation
ARM i.MX spi: fix compilation for i.MX21
ARM i.MX pcm037 eet: compile fixes
ARM i.MX: sdma is merged, so remove #ifdef SDMA_IS_MERGED
ARM mx3fb: check for DMA engine type
mach-pcm037_eet: Fix section mismatch for eet_init_devices()
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The find_next_bit, find_first_bit, find_next_zero_bit
and find_first_zero_bit functions were not properly
clamping to the maxbit argument at the bit level. They
were instead only checking maxbit at the byte level.
To fix this, add a compare and a conditional move
instruction to the end of the common bit-within-the-
byte code used by all the functions and be sure not to
clobber the maxbit argument before it is used.
Cc: <stable@kernel.org>
Reviewed-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: James Jones <jajones@nvidia.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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init_mm used at kernel/sched.c:idle_task_exit() has spin_lock
(init_mm.context.id_lock) that is not initialized when spin_lock/unlock
is called at an ARM machine. Note that mm_struct.context.id_lock is
usually initialized except for the instance of init_mm at
linux/arch/arm/mm/context.c
Not initializing this spinlock incurs "BUG: pinlock bad magic"
warning when spinlock debug is enabled. We have observed such
instances when testing PM in S5PC210 machines.
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Adding KERN_WARNING in the middle of strings now produces those tokens
in the output, rather than accepting the level as was once the case.
Fix this in the one reported case. There might be more...
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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f281233 (SCSI host lock push-down) broke the fas216 build:
drivers/scsi/arm/fas216.h: In function 'fas216_noqueue_command':
drivers/scsi/arm/fas216.h:354: error: storage class specified for parameter 'fas216_intr'
drivers/scsi/arm/fas216.h:356: error: storage class specified for parameter 'fas216_remove'
...
Fix it.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Commit 35bab0589b9a71533b37280eefa430c21dc102fe (ARM: imx: change the way
spi-imx devices are registered) contained a typo in mx25, leading to link time
failure.
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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Currently compilation breaks for the eukrea mbimx27 baseboard
when CONFIG_SPI_IMX is selected and CONFIG_TOUCHSCREEN_ADS7846
is not selected. Fix this by removing the ifdefs altogether.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Eric Benard <eric@eukrea.com>
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Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
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The pcm037 eet extension currently does not compile if
SPI_IMX is enabled. Fix it.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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We have two dma engines in MX3 systems: The IPU and the SDMA
engine. We have to check if we got a channel from the correct
engine before proceeding with a channel.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Reviewed-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
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This function should be marked as __init because it is used only
in the init phase.
This fix the compiler warning:
LD arch/arm/mach-mx3/built-in.o
WARNING: arch/arm/mach-mx3/built-in.o(.text+0x1328): Section mismatch in reference from the function eet_init_devices() to the (unknown reference) .init.rodata:(unknown)
The function eet_init_devices() references
the (unknown reference) __initconst (unknown).
This is often because eet_init_devices lacks a __initconst
annotation or the annotation of (unknown) is wrong.
Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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The .stack section doesn't contain any contents, and doesn't require
initialization either. Rather than marking the output section with
'NOLOAD' but still having it exist in the object files, mark it with
%nobits which avoids the assembler marking the section with 'CONTENTS'.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Commit 8b592783 added a Thumb-2 variant of usracc which, when it is
called with \rept=2, calls usraccoff once with an offset of 0 and
secondly with a hard-coded offset of 4 in order to avoid incrementing
the pointer again. If \inc != 4 then we will store the data to the wrong
offset from \ptr. Luckily, the only caller that passes \rept=2 to this
function is __clear_user so we haven't been actively corrupting user data.
This patch fixes usracc to pass \inc instead of #4 to usraccoff
when it is called a second time.
Cc: <stable@kernel.org>
Reported-by: Tony Thompson <tony.thompson@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The current implementation of sched_clock() for the Nomadik
family is based on the clock source that will wrap around without
any compensation. Currently on the Ux500 after 1030 seconds.
Utilize cnt32_to_63 to expand the sched_clock() counter to 63
bits and introduce a keepwarm() timer to assure that sched clock
and this cnt32_to_63 is called atleast once every half period.
When I print out the actual wrap-around time, and using
a year (3600*24*365 seconds) as minumum wrap limit I get an
actual wrap-around of:
sched_clock: using 55 bits @ 8333125 Hz wrap in 416 days
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Commit 7c63984b86 (ARM: do not define VMALLOC_END relative to PAGE_OFFSET)
changed VMALLOC_END to be an explicit value. Before this, it was
relative to PAGE_OFFSET and therefore converted to unsigned long
as PAGE_OFFSET is an unsigned long. This introduced the following
build warning. Fix this by changing the explicit defines of
VMALLOC_END to be unsigned long.
CC arch/arm/mm/init.o
arch/arm/mm/init.c: In function 'mem_init':
arch/arm/mm/init.c:606: warning: format '%08lx' expects type 'long unsigned int', but argument 12 has type 'unsigned int'
Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Acked-by: Uwe Kleine-K <u.kleine-koenig@pengutronix.dee>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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This change updates the ux500 specific outer cache code to use
the new *_relaxed() I/O accessors.
Signed-off-by: Per Fransson <per.xx.fransson@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Allow the compiler to better optimize the page table walking code
by avoiding over-complex pmd_addr_end() calculations. These
calculations prevent the compiler spotting that we'll never iterate
over the PMD table, causing it to create double nested loops where
a single loop will do.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6
* 'fbdev-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6:
sisfb: delete osdef.h
sisfb: move the CONFIG warning to sis_main.c
sisfb: replace SiS_SetMemory with memset_io
sisfb: remove InPort/OutPort wrappers
sisfb: use CONFIG_FB_SIS_301/315 instead of SIS301/315H
sisfb: delete redudant #define SIS_LINUX_KERNEL
sisfb: delete dead SIS_XORG_XF86 code
sisfb: delete fallback code for pci_map_rom()
sisfb: delete obsolete PCI ROM bug workaround
fbdev: Update documentation index file.
lxfb: Program panel v/h sync output polarity correctly
fbcmap: integer overflow bug
fbcmap: cleanup white space in fb_alloc_cmap()
MAINTAINERS: Add fbdev patchwork entry, tidy up file patterns.
fbdev: da8xx: punt duplicated FBIO_WAITFORVSYNC define
fbdev: sh_mobile_lcdcfb: fix bug in reconfig()
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The file is not needed.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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sis_main.c is always compiled, so we can check Kconfig options there.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Get rid of one more wrapper.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Remove register IO wrappers.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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There is no need to alias CONFIG #defines.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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It's not needed anymore with SIS_XORG_XF86 gone.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Delete code for compiling the driver for X.org/XFree86. The development
has forked, so there is no point keeping this code in the tree.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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If pci_map_rom() fails, there is some fallback code that basically
duplicates pci_map_rom() on non-x86 platforms. No point in that.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Delete a workaround for a PCI ROM bug that has been fixed ages ago by
the commit 761a3ac08c63718dacde12aaf0ec6d6760e8c2b7.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Thomas Winischhofer <thomas@winischhofer.net>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This is a simple update of the file Documentation/fb/00-INDEX based on
the directory content.
Signed-off-by: Vicente Jimenez Aguilar <googuy@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Commit b5c26f97ec4a17c65 introduced some breakage for the OLPC XO-1 laptop,
differences in the output video signal after the patch caused some problems
with the XO's display controller chip.
Reviewing of that commit against the AMD Geode LX Data Book, it seems
that these bits were being set inversely. In both cases, active high
output is denoted by a value of 0. See section 6.8.3.44 of the databook
from February 2009 (Publication ID: 33234H)
Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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There is an integer overflow in fb_set_user_cmap() because cmap->len * 2
can wrap. It's basically harmless. Your terminal will be messed up
until you type reset.
This patch does three things to fix the bug.
First, it checks the return value of fb_copy_cmap() in fb_alloc_cmap().
That is enough to fix address the overflow.
Second it checks for the integer overflow in fb_set_user_cmap().
Lastly I wanted to cap "cmap->len" in fb_set_user_cmap() much lower
because it gets used to determine the size of allocation. Unfortunately
no one knows what the limit should be. Instead what this patch does
is makes the allocation happen with GFP_KERNEL instead of GFP_ATOMIC
and lets the kmalloc() decide what values of cmap->len are reasonable.
To do this, the patch introduces a function called fb_alloc_cmap_gfp()
which is like fb_alloc_cmap() except that it takes a GFP flag.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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checkpatch.pl and Andrew Morton both complained about the indenting in
fb_alloc_cmap()
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Now that the patchwork queue is up, add it in. While we're at it, fix up
the file patterns, too.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This is already defined by linux/fb.h now, so punt the duplicate
definition from the driver header.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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The function sh_mobile_fb_reconfig() contained a bug,
which caused the line_length to be set wrongly, if a mode
with a different X-resolution than the default one was chosen.
This caused 1080p24 mode to not work on AP4EVB.
Additionally the notifier chain was also called with the wrong
mode.
This patch fixes this, by using the X-resolution of the new
mode instead of the old one to calculate line length and
hands over the correct mode to the notifier chain.
Signed-off-by: Arnd Hannemann <arnd@arndnet.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* 'sh-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
sh: clkfwk: Build fix for non-legacy CPG changes.
sh: Use GCC __builtin_prefetch() to implement prefetch().
sh: fix vsyscall compilation due to .eh_frame issue
sh: avoid to flush all cache in sys_cacheflush
sh: clkfwk: Disable init clk op for non-legacy clocks.
sh: clkfwk: Kill off now unused algo_id in set_rate op.
sh: clkfwk: Kill off unused clk_set_rate_ex().
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The disabling of the init op for non-legacy clocks neglected to do the
same in the core clock framework, resulting in a build failure. Fix it
up.
Reported-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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GCC's __builtin_prefetch() was introduced a long time ago, all
supported GCC versions have it. So this patch is to use it for
implementing the prefetch on SH2A and SH4.
The current prefetch implementation is almost equivalent with
__builtin_prefetch.
The third parameter in the __builtin_prefetch is the locality
that it's not supported on SH architectures. It has been set
to three and it should be verified if it's suitable for SH2A
as well. I didn't test on this architecture.
The builtin usage should be more efficient that an __asm__
because less barriers, and because the compiler doesn't see the
inst as a "black box" allowing better code generation.
This has been already done on other architectures (see the commit:
0453fb3c528c5eb3483441a466b24a4cb409eec5).
Many thanks to Christian Bruel <christain.bruel@st.com> for his
support on evaluate the impact of the gcc built-in on SH4 arch.
No regressions found while testing with LMbench on STLinux targets.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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