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This set of changes are fixing various section mismatch warnings which
look to be completely valid. Primerily, those which are fixed are those
which can cause oopses by manipulation of driver binding via sysfs. For
example: calling code marked __init from driver probe __devinit
functions.
Some of these changes will be reworked at the next merge window when the
underlying reasons are sorted out. In the mean time, I think it's
important to have this fixed for correctness.
Also included in this set are fixes to various error messages in OMAP -
including making them gramatically correct, fixing a few spelling
errors, and more importantly, making them greppable by unwrapping them.
Tony Lindgren has acked all these patches, put them out for testing a
week ago, and I've tested them on the platforms I have.
* 'omap-fixes-warnings' of git://git.linaro.org/people/rmk/linux-arm:
ARM: omap: resolve nebulous 'Error setting wl12xx data'
ARM: omap: fix wrapped error messages in omap_hwmod.c
ARM: omap: fix section mismatch warnings in mux.c caused by hsmmc.c
ARM: omap: fix section mismatch warning for sdp3430_twl_gpio_setup()
ARM: omap: fix section mismatch error for omap_4430sdp_display_init()
ARM: omap: fix section mismatch warning for omap_secondary_startup()
ARM: omap: preemptively fix section mismatch in omap4_sdp4430_wifi_mux_init()
ARM: omap: fix section mismatch warning in mux.c
ARM: omap: fix section mismatch errors in TWL PMIC driver
ARM: omap: fix uninformative vc/i2c configuration error message
ARM: omap: fix vc.c PMIC error message
ARM: omap: fix prm44xx.c OMAP44XX_IRQ_PRCM build error
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This pull request covers the major oopsing issues with OMAP, caused by
the lack of the TWL driver. Even when the TWL driver is not built in,
we shouldn't oops.
* 'omap-fixes-urgent' of git://git.linaro.org/people/rmk/linux-arm:
ARM: omap: fix broken twl-core dependencies and ifdefs
ARM: omap: fix oops in drivers/video/omap2/dss/dpi.c
ARM: omap: fix oops in arch/arm/mach-omap2/vp.c when pmic is not found
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* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
ARM: 7322/1: Print BUG instead of undefined instruction on BUG_ON()
ARM: 7321/1: cache-v7: Disable preemption when reading CCSIDR
ARM: 7320/1: Fix proc_info table alignment
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Some code - especially the crypto layer - wants to use the x86
FP/MMX/AVX register set in what may be interrupt (typically softirq)
context.
That *can* be ok, but the tests for when it was ok were somewhat
suspect. We cannot touch the thread-specific status bits either, so
we'd better check that we're not going to try to save FP state or
anything like that.
Now, it may be that the TS bit is always cleared *before* we set the
USEDFPU bit (and only set when we had already cleared the USEDFP
before), so the TS bit test may actually have been sufficient, but it
certainly was not obviously so.
So this explicitly verifies that we will not touch the TS_USEDFPU bit,
and adds a few related sanity-checks. Because it seems that somehow
AES-NI is corrupting user FP state. The cause is not clear, and this
patch doesn't fix it, but while debugging it I really wanted the code to
be more obviously correct and robust.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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It was marked asmlinkage for some really old and stale legacy reasons.
Fix that and the equally stale comment.
Noticed when debugging the irq_fpu_usable() bugs.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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It's useful to print the error code when a called function fails so a
diagnosis of why it failed is possible. In this case, it fails because
we try to register some data for the wl12xx driver, but as the driver
is not configured, a stub function is used which simply returns -ENOSYS.
Let's do the simple thing for -rc and print the error code.
Also, the return code from platform_register_device() at each of these
sites was not being checked. Add some checking, and again print the
error code.
This should be fixed properly for the next merge window so we don't
issue error messages merely because a driver is not configured.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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While trying to debug my OMAP platforms, they emitted this message:
omap_hwmod: %s: enabled state can only be entered from initialized, idle, or disabled state
The following backtrace said it was from a function called '_enable',
which didn't provide much clue. Grepping didn't find it either.
The message is wrapped, so unwrap the message so grep can find it. Do
the same for three other messages in this file.
Acked-by: Paul Walmsley <paul@pwsan.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The previous commit causes new section mismatch warnings:
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdb30): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_gpio()
The function omap_init_hsmmc() references
the function __init omap_mux_init_gpio().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_gpio is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdb4c): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_gpio()
The function omap_init_hsmmc() references
the function __init omap_mux_init_gpio().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_gpio is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdb60): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdb6c): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdb78): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdb90): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdb9c): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdba8): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdbc0): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdbcc): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdbd8): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdbf8): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdc04): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdc10): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdc28): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdc34): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdc40): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdc58): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdc64): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdc70): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
WARNING: arch/arm/mach-omap2/built-in.o(.text+0xdc7c): Section mismatch in reference from the function omap_init_hsmmc() to the function .init.text:omap_mux_init_signal()
The function omap_init_hsmmc() references
the function __init omap_mux_init_signal().
This is often because omap_init_hsmmc lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
Again, as for omap2_hsmmc_init(), these functions are callable at
runtime via the gpio-twl4030.c driver, and so these can't be marked
__init.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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WARNING: arch/arm/mach-omap2/built-in.o(.text+0xd0f0): Section mismatch in reference from the function sdp3430_twl_gpio_setup() to the function .init.text:omap2_hsmmc_init()
The function sdp3430_twl_gpio_setup() references
the function __init omap2_hsmmc_init().
This is often because sdp3430_twl_gpio_setup lacks a __init
annotation or the annotation of omap2_hsmmc_init is wrong.
sdp3430_twl_gpio_setup() is called via platform data from the
gpio-twl4030 module, which can be inserted and removed at runtime.
This makes sdp3430_twl_gpio_setup() callable at runtime, and prevents
it being marked with an __init annotation.
As it calls omap2_hsmmc_init() unconditionally, the only resolution to
this warning is to remove the __init markings from omap2_hsmmc_init()
and its called functions. This addresses the functions in hsmmc.c.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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WARNING: arch/arm/mach-omap2/built-in.o(.text+0xb798): Section mismatch in reference from the function omap_4430sdp_display_init() to the function .init.text:omap_display_init()
The function omap_4430sdp_display_init() references
the function __init omap_display_init().
This is often because omap_4430sdp_display_init lacks a __init
annotation or the annotation of omap_display_init is wrong.
Fix this by adding __init to omap_4430sdp_display_init().
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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WARNING: vmlinux.o(.text+0x1c664): Section mismatch in reference from the function omap_secondary_startup() to the function .cpuinit.text:secondary_startup()
The function omap_secondary_startup() references
the function __cpuinit secondary_startup().
This is often because omap_secondary_startup lacks a __cpuinit
annotation or the annotation of secondary_startup is wrong.
Unfortunately, fixing this causes a new warning which is harder to
solve:
WARNING: arch/arm/mach-omap2/built-in.o(.text+0x5328): Section mismatch in reference from the function omap4_hotplug_cpu() to the function .cpuinit.text:omap_secondary_startup()
The function omap4_hotplug_cpu() references
the function __cpuinit omap_secondary_startup().
This is often because omap4_hotplug_cpu lacks a __cpuinit
annotation or the annotation of omap_secondary_startup is wrong.
because omap4_hotplug_cpu() is used by power management code as well,
which may not end up using omap_secondary_startup().
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Found by review.
omap4_sdp4430_wifi_mux_init() is called by an __init marked function,
and only calls omap_mux_init_gpio() and omap_mux_init_signal() which
are both also an __init marked functions.
The only reason this doesn't issue a warning is because the compiler
inlines omap4_sdp4430_wifi_mux_init() into omap4_sdp4430_wifi_init().
So, lets add the __init annotation to ensure this remains safe should
the compiler choose not to inline.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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WARNING: arch/arm/mach-omap2/built-in.o(.text+0x15a4): Section mismatch in reference from the function omap_mux_init_signals() to the function .init.text:omap_mux_init_signal()
The function omap_mux_init_signals() references
the function __init omap_mux_init_signal().
This is often because omap_mux_init_signals lacks a __init
annotation or the annotation of omap_mux_init_signal is wrong.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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On my OMAP4 platform, I'm getting this error message repeated several
times at boot:
omap_vc_i2c_init: I2C config for all channels must match.
omap_vc_i2c_init: I2C config for all channels must match.
This doesn't help identify what the problem is. Fix this message to
be more informative:
omap_vc_i2c_init: I2C config for vdd_iva does not match other channels (0).
omap_vc_i2c_init: I2C config for vdd_mpu does not match other channels (0).
This allows us to identify which voltage domains have a problem, and
what the I2C configuration state (a boolean, i2c_high_speed) setting
being used actually is.
From this we find that omap4_core_pmic has i2c_high_speed false, but
omap4_iva_pmic and omap4_mpu_pmic both have it set true.
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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While testing on my OMAP3430 platform, this error message was emitted:
omap_vc_init_channel: PMIC info requried to configure vc forvdd_core not populated.Hence cannot initialize vc
Trying to find this message was difficult because it was wrapped across
several lines. It also mis-spells "required", doesn't read very well,
and has spaces lacking. Let's replace it with a more concise:
omap_vc_init_channel: No PMIC info for vdd_core
While we're here, fix a simple spelling error in a comment.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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When CONFIG_OF is disabled, the compile fails with:
arch/arm/mach-omap2/prm44xx.c:41: error: 'OMAP44XX_IRQ_PRCM' undeclared here (not in a function)
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf: Fix double start/stop in x86_pmu_start()
perf evsel: Fix an issue where perf report fails to show the proper percentage
perf tools: Fix prefix matching for kernel maps
perf tools: Fix perf stack to non executable on x86_64
perf: Remove deprecated WARN_ON_ONCE()
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Serial/TTY fixes for the 3.3-rc3 tree
Just a few new device ids, omap serial driver regression fixes, and a
build fix for the 8250 driver movement.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tag 'tty-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
tty: serial: omap-serial: wakeup latency constraint is in microseconds, not milliseconds
tty: serial: OMAP: block idle while the UART is transferring data in PIO mode
tty: serial: OMAP: use a 1-byte RX FIFO threshold in PIO mode
m32r: relocate drivers back out of 8250 dir
tty: fix a build failure on sparc
serial: samsung: Add support for EXYNOS5250
serial: samsung: Add support for EXYNOS4212 and EXYNOS4412
drivers/tty/vt/vt_ioctl.c: fix KDFONTOP 32bit compatibility layer
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Prevent OMAP UARTs from going idle while they are still transferring
data in PIO mode. This works around an oversight in the OMAP UART
hardware present in OMAP34xx and earlier: an idle UART won't send a
wakeup when the TX FIFO threshold is reached. This causes long delays
during data transmission when the MPU powerdomain enters a low-power
mode. The MPU interrupt controller is not able to respond to
interrupts when it's in a low-power state, so the TX buffer is not
refilled until another wakeup event occurs.
This fix changes the erratum i291 DMA idle workaround. Rather than
toggling between force-idle and no-idle, it will toggle between
smart-idle and no-idle. The important part of the workaround is the
no-idle part, so this shouldn't result in any change in behavior.
This fix should work on all OMAP UARTs. Future patches intended for
the 3.4 merge window will make this workaround conditional on a
"feature" flag, and will use the OMAP36xx+ TX event wakeup support.
Thanks to Kevin Hilman <khilman@ti.com> for mentioning the erratum i291
workaround, which led to the development of this approach.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Govindraj.R <govindraj.raja@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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When the PMIC is not found, voltdm->pmic will be NULL. vp.c's
initialization function tries to dereferences this, which causes an
oops:
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c0004000
[00000000] *pgd=00000000
Internal error: Oops: 5 [#1] PREEMPT
Modules linked in:
CPU: 0 Not tainted (3.3.0-rc2+ #204)
PC is at omap_vp_init+0x5c/0x15c
LR is at omap_vp_init+0x58/0x15c
pc : [<c03db880>] lr : [<c03db87c>] psr: 60000013
sp : c181ff30 ip : c181ff68 fp : c181ff64
r10: c0407808 r9 : c040786c r8 : c0407814
r7 : c0026868 r6 : c00264fc r5 : c040ad6c r4 : 00000000
r3 : 00000040 r2 : 000032c8 r1 : 0000fa00 r0 : 000032c8
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
Control: 10c5387d Table: 80004019 DAC: 00000015
Process swapper (pid: 1, stack limit = 0xc181e2e8)
Stack: (0xc181ff30 to 0xc1820000)
ff20: c0381d00 c02e9c6d c0383582 c040786c
ff40: c040ad6c c00264fc c0026868 c0407814 00000000 c03d9de4 c181ff8c c181ff68
ff60: c03db448 c03db830 c02e982c c03fdfb8 c03fe004 c0039988 00000013 00000000
ff80: c181ff9c c181ff90 c03d9df8 c03db390 c181ffdc c181ffa0 c0008798 c03d9df0
ffa0: c181ffc4 c181ffb0 c0055a44 c0187050 c0039988 c03fdfb8 c03fe004 c0039988
ffc0: 00000013 00000000 00000000 00000000 c181fff4 c181ffe0 c03d1284 c0008708
ffe0: 00000000 c03d1208 00000000 c181fff8 c0039988 c03d1214 1077ce40 01f7ee08
Backtrace:
[<c03db824>] (omap_vp_init+0x0/0x15c) from [<c03db448>] (omap_voltage_late_init+0xc4/0xfc)
[<c03db384>] (omap_voltage_late_init+0x0/0xfc) from [<c03d9df8>] (omap2_common_pm_late_init+0x14/0x54)
r8:00000000 r7:00000013 r6:c0039988 r5:c03fe004 r4:c03fdfb8
[<c03d9de4>] (omap2_common_pm_late_init+0x0/0x54) from [<c0008798>] (do_one_initcall+0x9c/0x164)
[<c00086fc>] (do_one_initcall+0x0/0x164) from [<c03d1284>] (kernel_init+0x7c/0x120)
[<c03d1208>] (kernel_init+0x0/0x120) from [<c0039988>] (do_exit+0x0/0x2cc)
r5:c03d1208 r4:00000000
Code: e5ca300b e5900034 ebf69027 e5994024 (e5941000)
---[ end trace aed617dddaf32c3d ]---
Kernel panic - not syncing: Attempted to kill init!
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The ARM kernel uses undefined instructions to implement
BUG/BUG_ON(). This leads to problems where people don't read one
line above the Oops message and see the "kernel BUG at ..."
message and so they wrongly assume the kernel has hit an
undefined instruction.
Instead of printing:
Internal error: Oops - undefined instruction: 0 [#1] PREEMPT SMP
print
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
This should prevent people from thinking the BUG_ON was an
undefined instruction when it was actually intentional.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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armv7's flush_cache_all() flushes caches via set/way. To
determine the cache attributes (line size, number of sets,
etc.) the assembly first writes the CSSELR register to select a
cache level and then reads the CCSIDR register. The CSSELR register
is banked per-cpu and is used to determine which cache level CCSIDR
reads. If the task is migrated between when the CSSELR is written and
the CCSIDR is read the CCSIDR value may be for an unexpected cache
level (for example L1 instead of L2) and incorrect cache flushing
could occur.
Disable interrupts across the write and read so that the correct
cache attributes are read and used for the cache flushing
routine. We disable interrupts instead of disabling preemption
because the critical section is only 3 instructions and we want
to call v7_dcache_flush_all from __v7_setup which doesn't have a
full kernel stack with a struct thread_info.
This fixes a problem we see in scm_call() when flush_cache_all()
is called from preemptible context and sometimes the L2 cache is
not properly flushed out.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
|
With an admittedly exotic choice of configuration options
(CC_OPTIMIZE_FOR_SIZE, THUMB2, some other size-minimizing ones)
and compiler, the proc_info table can end up being misaligned,
and the kernel being unbootable (Error: unrecognized/unsupported
processor variant).
Forcing the alignement to 4 bytes in the linker script fixes the
issue.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
|
fbdev fixes for 3.3
It includes:
- compile fix for fsl-diu-fb
- fix for a suspend/resume issue in atmel_lcdfb
- fix for a suspend/resume issue in OMAP
- workaround for a hardware bug to avoid physical damage in OMAP
- really trivial dead code removal in intelfb
* tag 'fbdev-fixes-for-3.3-1' of git://github.com/schandinat/linux-2.6:
atmel_lcdfb: fix usage of CONTRAST_CTR in suspend/resume
intelfb: remove some dead code
drivers/video: compile fixes for fsl-diu-fb.c
OMAPDSS: HDMI: PHY burnout fix
OMAP: 4430SDP/Panda: add HDMI HPD gpio
OMAP: 4430SDP/Panda: setup HDMI GPIO muxes
OMAPDSS: remove wrong HDMI HPD muxing
OMAP: 4430SDP/Panda: rename HPD GPIO to CT_CP_HPD
OMAP: 4430SDP/Panda: use gpio_free_array to free HDMI gpios
OMAPDSS: use sync versions of pm_runtime_put
|
|
arch: fix ioport mapping on mips,sh
Kevin Cernekee reported that recent cleanup that replaced pci_iomap with
a generic function failed to take into account the differences in io
port handling on mips and sh architectures.
Rather than revert the changes reintroducing the code duplication, this
patchset fixes this by adding ability for architectures to override
ioport mapping for pci devices.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
sh: use the the PCI channels's io_map_base
mips: use the the PCI controller's io_map_base
lib: add NO_GENERIC_PCI_IOPORT_MAP
|
|
The following patch fixes a bug introduced by the following
commit:
e050e3f0a71b ("perf: Fix broken interrupt rate throttling")
The patch caused the following warning to pop up depending on
the sampling frequency adjustments:
------------[ cut here ]------------
WARNING: at arch/x86/kernel/cpu/perf_event.c:995 x86_pmu_start+0x79/0xd4()
It was caused by the following call sequence:
perf_adjust_freq_unthr_context.part() {
stop()
if (delta > 0) {
perf_adjust_period() {
if (period > 8*...) {
stop()
...
start()
}
}
}
start()
}
Which caused a double start and a double stop, thus triggering
the assert in x86_pmu_start().
The patch fixes the problem by avoiding the double calls. We
pass a new argument to perf_adjust_period() to indicate whether
or not the event is already stopped. We can't just remove the
start/stop from that function because it's called from
__perf_event_overflow where the event needs to be reloaded via a
stop/start back-toback call.
The patch reintroduces the assertion in x86_pmu_start() which
was removed by commit:
84f2b9b ("perf: Remove deprecated WARN_ON_ONCE()")
In this second version, we've added calls to disable/enable PMU
during unthrottling or frequency adjustment based on bug report
of spurious NMI interrupts from Eric Dumazet.
Reported-and-tested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Stephane Eranian <eranian@google.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: markus@trippelsdorf.de
Cc: paulus@samba.org
Link: http://lkml.kernel.org/r/20120207133956.GA4932@quad
[ Minor edits to the changelog and to the code ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
|
|
Fixing a regression with the PMU MSRs when PMU virtualization is
disabled, a guest-internal DoS with the SYSCALL instruction, and a dirty
memory logging race that may cause live migration to fail.
* 'kvm-updates/3.3' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: do not #GP on perf MSR writes when vPMU is disabled
KVM: x86: fix missing checks in syscall emulation
KVM: x86: extend "struct x86_emulate_ops" with "get_cpuid"
KVM: Fix __set_bit() race in mark_page_dirty() during dirty logging
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
arm-soc fixes for 3.3-rc
* A series of OMAP regression fixes for merge window fallout
* Two patches for Davinci, one removes some misdefined clocks, the other
is a regression fix for merge window fallout
* Two patches that makes Broadcom bcmring build again (and removes a
bunch of unused code in the process)
* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: bcmring: fix build failure in mach-bcmring/arch.c
ARM: bcmring: remove unused DMA map code
ARM: davinci: update mdio bus name
ARM: OMAP2+: arch/arm/mach-omap2/smartreflex.c: add missing iounmap
ARM: OMAP2+: arch/arm/mach-omap2/devices.c: introduce missing kfree
ARM: OMAP: fix MMC2 loopback clock handling
ARM: OMAP: fix erroneous mmc2 clock change on mmc3 setup
ARM: OMAP2+: GPMC: fix device size setup
ARM: OMAP2+: timer: Fix crash due to wrong arg to __omap_dm_timer_read_counter
ARM: OMAP3: hwmod data: register dss hwmods after dss_core
ARM: OMAP2/3: PRM: fix missing plat/irqs.h build breakage
ARM: OMAP2+: io: fix compilation breakage on 2420-only configs
ARM: OMAP4: hwmod data: Add names for DMIC memory address space
ARM: OMAP3: hwmod data: add SYSC_HAS_ENAWAKEUP for dispc
ARM: OMAP2+: hwmod data: split omap2/3 dispc hwmod class
ARM: davinci: DA850: remove non-existing pll1_sysclk4-7 clocks
ARM: OMAP2: fix regulator warnings
ARM: OMAP2: fix omap3 touchbook kconfig warning
i2c: OMAP: Fix OMAP1 build error
|
|
Upstream commit d1fce9c115eeb93e01c01732dfe9a86cf76009cf
"ARM: restart: bcmring: use new restart hook"
breaks building of this platform, since what used to be the
last field of the MACHINE_START/END block didn't have a
trailing comma. Once another field was added below, we get:
arch/arm/mach-bcmring/arch.c:198: error: request for member 'restart' in something not a structure or union
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Jiandong Zheng <jdzheng@broadcom.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
|
|
Remove BCMRING DMA map code which is no longer used.
This also fixes a build error with dma.c introduced by
bfcd2ea6a40b33270564d706396f1b514a988d3c.
Signed-off-by: Jiandong Zheng <jdzheng@broadcom.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
|
|
* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
i.MX SDMA: Fix burstsize settings
ARM: mach-shmobile: both USB DMAC instances on sh7372 are slave-only
dma: sh_dma: not all SH DMAC implementations support MEMCPY
at_hdmac: bugfix for enabling channel irq
dmaengine: fix missing 'cnt' in ?: in dmatest
|
|
* akpm:
mm: compaction: check pfn_valid when entering a new MAX_ORDER_NR_PAGES block during isolation for migration
readahead: fix pipeline break caused by block plug
kprobes: fix a memory leak in function pre_handler_kretprobe()
drivers/tty/vt/vt_ioctl.c: fix KDFONTOP 32bit compatibility layer
lkdtm: avoid calling lkdtm_do_action() with spinlock held
mm/filemap_xip.c: fix race condition in xip_file_fault()
mm/memcontrol.c: fix warning with CONFIG_NUMA=n
avr32: select generic atomic64_t support
mm: postpone migrated page mapping reset
xtensa: fix memscan()
MAINTAINERS: update lguest F: patterns
MAINTAINERS: remove staging sections
MAINTAINERS: remove iMX5 section
MAINTAINERS: update partitions block F: patterns
|
|
* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
ARM: 7314/1: kuser: consistently use usr_ret for returning from helpers
ARM: 7302/1: Add TLB flushing for both entries in a PMD
ARM: 7303/1: perf: add empty NODE event definitions for Cortex-A5 and Cortex-A15
ARM: 7308/1: vfp: flush thread hwstate before copying ptrace registers
ARM: 7307/1: vfp: fix ptrace regset modification race
ARM: 7306/1: vfp: flush thread hwstate before restoring context from sigframe
Revert "ARM: 7304/1: ioremap: fix boundary check when reusing static mapping"
|
|
Enable use of the generic atomic64 implementation on AVR32 platforms.
Without this the kernel fails to build as the architecture does not
provide its version.
Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Defining memscan() as memchr() is wrong, because the return values of
memscan() and memchr() are different when the character is not found. So
use the generic memscan() implementation to fix this.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
__kuser_cmpxchg64 has a return path using bx lr to get back to the caller.
This is actually ok since the code in question is predicated on
CONFIG_CPU_32v6K, but for the sake of consistency using the usr_ret
macro is probably better.
Acked-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
|
With the new throttling/unthrottling code introduced with
commit:
e050e3f0a71b ("perf: Fix broken interrupt rate throttling")
we occasionally hit two WARN_ON_ONCE() checks in:
- intel_pmu_pebs_enable()
- intel_pmu_lbr_enable()
- x86_pmu_start()
The assertions are no longer problematic. There is a valid
path where they can trigger but it is harmless.
The assertion can be triggered with:
$ perf record -e instructions:pp ....
Leading to paths:
intel_pmu_pebs_enable
intel_pmu_enable_event
x86_perf_event_set_period
x86_pmu_start
perf_adjust_freq_unthr_context
perf_event_task_tick
scheduler_tick
And:
intel_pmu_lbr_enable
intel_pmu_enable_event
x86_perf_event_set_period
x86_pmu_start
perf_adjust_freq_unthr_context.
perf_event_task_tick
scheduler_tick
cpuc->enabled is always on because when we get to
perf_adjust_freq_unthr_context() the PMU is not totally
disabled. Furthermore when we need to adjust a period,
we only stop the event we need to change and not the
entire PMU. Thus, when we re-enable, cpuc->enabled is
already set. Note that when we stop the event, both
pebs and lbr are stopped if necessary (and possible).
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: peterz@infradead.org
Link: http://lkml.kernel.org/r/20120202110401.GA30911@quad
Signed-off-by: Ingo Molnar <mingo@elte.hu>
|
|
* 'next' of git://git.monstr.eu/linux-2.6-microblaze:
Revert "microblaze: Add topology init"
|
|
'sched-urgent-for-linus' and 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
bugs, x86: Fix printk levels for panic, softlockups and stack dumps
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf top: Fix number of samples displayed
perf tools: Fix strlen() bug in perf_event__synthesize_event_type()
perf tools: Fix broken build by defining _GNU_SOURCE in Makefile
x86/dumpstack: Remove unneeded check in dump_trace()
perf: Fix broken interrupt rate throttling
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/rt: Fix task stack corruption under __ARCH_WANT_INTERRUPTS_ON_CTXSW
sched: Fix ancient race in do_exit()
sched/nohz: Fix nohz cpu idle load balancing state with cpu hotplug
sched/s390: Fix compile error in sched/core.c
sched: Fix rq->nr_uninterruptible update race
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/reboot: Remove VersaLogic Menlow reboot quirk
x86/reboot: Skip DMI checks if reboot set by user
x86: Properly parenthesize cmpxchg() macro arguments
|
|
Linux uses two PMD entries for a PTE with the classic page table format,
covering 2MB range. However, the __pte_free_tlb() function only adds a
single TLB flush corresponding to 1MB range covering 'addr'. On
Cortex-A15, level 1 entries can be cached by the TLB independently of
the level 2 entries and without additional flushing a PMD entry would be
left pointing at the wrong PTE. The patch limits the TLB flushing range
to two 4KB pages around the 1MB boundary within PMD.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
|
Commit 89d6c0b5 ("perf, arch: Add generic NODE cache events") added
empty NODE event definitions for the ARM PMU implementations. This was
merged along with Cortex-A5 and Cortex-A15 PMU support, so they missed
out on the original patch.
This patch adds the empty definitions to Cortex-A5 and Cortex-A15.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
|
If we are context switched whilst copying into a thread's
vfp_hard_struct then the partial copy may be corrupted by the VFP
context switching code (see "ARM: vfp: flush thread hwstate before
restoring context from sigframe").
This patch updates the ptrace VFP set code so that the thread state is
flushed before the copy, therefore disabling VFP and preventing
corruption from occurring.
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
|
In a preemptible kernel, vfp_set() can be preempted, causing the
hardware VFP context to be switched while the thread vfp state is
being read and modified. This leads to a race condition which can
cause the thread vfp state to become corrupted if lazy VFP context
save occurs due to preemption in between the time thread->vfpstate
is read and the time the modified state is written back.
This may occur if preemption occurs during the execution of a
ptrace() call which modifies the VFP register state of a thread.
Such instances should be very rare in most realistic scenarios --
none has been reported, so far as I am aware. Only uniprocessor
systems should be affected, since VFP context save is not currently
lazy in SMP kernels.
The problem was introduced by my earlier patch migrating to use
regsets to implement ptrace.
This patch does a vfp_sync_hwstate() before reading
thread->vfpstate, to make sure that the thread's VFP state is not
live in the hardware registers while the registers are modified.
Thanks to Will Deacon for spotting this.
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
|
Following execution of a signal handler, we currently restore the VFP
context from the ucontext in the signal frame. This involves copying
from the user stack into the current thread's vfp_hard_struct and then
flushing the new data out to the hardware registers.
This is problematic when using a preemptible kernel because we could be
context switched whilst updating the vfp_hard_struct. If the current
thread has made use of VFP since the last context switch, the VFP
notifier will copy from the hardware registers into the vfp_hard_struct,
overwriting any data that had been partially copied by the signal code.
Disabling preemption across copy_from_user calls is a terrible idea, so
instead we move the VFP thread flush *before* we update the
vfp_hard_struct. Since the flushing is performed lazily, this has the
effect of disabling VFP and clearing the CPU's VFP state pointer,
therefore preventing the thread from being updated with stale data on
the next context switch.
Cc: stable <stable@vger.kernel.org>
Tested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
|
This reverts commit 3c424f359898aff48c3d5bed608ac706f8a528c3.
Joachim Eastwood reports:
| "ARM: 7304/1: ioremap: fix boundary check when reusing static mapping"
| Commit: 3c424f359898aff48c3d5bed608ac706f8a528c3 in Linus master
|
| Breaks booting on my custom AT91RM9200 board.
| There isn't any error messages or anything that indicates what goes
| wrong it just stops after; Uncompressing Linux... done, booting the
| kernel.
|
| Reverting it makes my board boot again.
and further debugging reveals:
ioremap: pfn=fffff phys=fffff000 offset=400 size=1000
ioremap: area c3ffdfc0: phys_addr=200000 pfn=200 size=4000
ioremap: found: addr fef74000 => fed73000 => fed73400
Clearly, an area for pfn 0x200, 16K can't ever satisfy a request for pfn
0xfffff. This happens because the changed if statement becomes:
if (0x00200 > 0xfffff ||
0xfffff000 + 0x400 + 0x1000-1 > 0x00200000 + 0x4000-1)
and therefore:
if (0x00200 > 0xfffff ||
0x000003ff > 0x00203fff)
The if condition fails, and so we _believe_ that the SRAM mapping fits
our request. Clearly that's totally bogus.
Moreover, the original premise of the 'fix' patch was wrong:
| The condition checking boundaries of the requested and existing
| mappings didn't take in-page offset into consideration though,
| which lead to obscure and hard to debug problems when requested
| mapping crossed end of the static one.
as the code immediately above this loop does:
size = PAGE_ALIGN(offset + size);
so 'size' already contains the requested offset into the page.
So, revert the broken 'fix'.
Acked-by: Nicolas Pitre <nico@linaro.org>
|
|
Both sparc 32-bit's software divide assembler and MPILIB provide
clz_tab[] with identical contents.
Break it out into a seperate object file and select it when
SPARC32 or MPILIB is set.
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: James Morris <jmorris@namei.org>
|
|
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
|
|
Return to behaviour perf MSR had before introducing vPMU in case vPMU
is disabled. Some guests access those registers unconditionally and do
not expect it to fail.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
|
|
On hosts without this patch, 32bit guests will crash (and 64bit guests
may behave in a wrong way) for example by simply executing following
nasm-demo-application:
[bits 32]
global _start
SECTION .text
_start: syscall
(I tested it with winxp and linux - both always crashed)
Disassembly of section .text:
00000000 <_start>:
0: 0f 05 syscall
The reason seems a missing "invalid opcode"-trap (int6) for the
syscall opcode "0f05", which is not available on Intel CPUs
within non-longmodes, as also on some AMD CPUs within legacy-mode.
(depending on CPU vendor, MSR_EFER and cpuid)
Because previous mentioned OSs may not engage corresponding
syscall target-registers (STAR, LSTAR, CSTAR), they remain
NULL and (non trapping) syscalls are leading to multiple
faults and finally crashs.
Depending on the architecture (AMD or Intel) pretended by
guests, various checks according to vendor's documentation
are implemented to overcome the current issue and behave
like the CPUs physical counterparts.
[mtosatti: cleanup/beautify code]
Signed-off-by: Stephan Baerwolf <stephan.baerwolf@tu-ilmenau.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
|
|
In order to be able to proceed checks on CPU-specific properties
within the emulator, function "get_cpuid" is introduced.
With "get_cpuid" it is possible to virtually call the guests
"cpuid"-opcode without changing the VM's context.
[mtosatti: cleanup/beautify code]
Signed-off-by: Stephan Baerwolf <stephan.baerwolf@tu-ilmenau.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
|
