In order for CPUidle to work on SMP systems, an implementation of
cpu_idle_wait() is needed.
This patch duplicates the x86 implementation of cpu_idle_wait() for
ARM.
Tested-by: Colin Cross <ccross@android.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Broadcast should not be needed when running SMP kernel on UP systems.
Also, this fixes an undefined instruction for SMP_ON_UP on earlier ARM
cores without the extended CPUID_EXT_MMFR3 register.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Commit 14eff18126 added proper
detection for ARM11MPCore/Cortex-A9 instead of detecting them
as ARMv7. However, it was missing the HWCAP_TLS flags.
HWCAP_TLS is needed if support for earlier ARMv6 is compiled
into the same kernel. Without HWCAP_TLS flags the userspace
won't work unless nosmp is specified:
Kernel panic - not syncing: Attempted to kill init!
CPU0: stopping
<c005d5e4>] (unwind_backtrace+0x0/0xec) from [<c004c2f8>] (do_IPI+0xfc/0x184)
<c004c2f8>] (do_IPI+0xfc/0x184) from [<c03f25bc>] (__irq_svc+0x9c/0x160)
Exception stack(0xc0565f80 to 0xc0565fc8)
5f80: 00000001 c05772a0 00000000 00003a61 c0564000 c05cf500 c003603c c0578600
5fa0: 80033ef0 410fc091 0000001f 00000000 00000000 c0565fc8 c00b91f8 c0057cb4
5fc0: 20000013 ffffffff
[<c03f25bc>] (__irq_svc+0x9c/0x160) from [<c0057cb4>] (default_idle+0x30/0x38)
[<c0057cb4>] (default_idle+0x30/0x38) from [<c005829c>] (cpu_idle+0x9c/0xf8)
[<c005829c>] (cpu_idle+0x9c/0xf8) from [<c0008d48>] (start_kernel+0x2a4/0x300)
[<c0008d48>] (start_kernel+0x2a4/0x300) from [<80008084>] (0x80008084)
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
According to Atmel, their 926T processors (AT91 post RM9200) requires
'Wait for Interrupt' mode be entered right after disabling the processor clock
in order to minimise current consumption when idle, so do both provided we're
not running on a 920T (an RM9200).
Furthermore, get rid of the #ifndef CONFIG_DEBUG_KERNEL, since arch_idle()
can be turned off completely with the kernel parameter 'nohlt'.
Cc: Andrew Victor <avictor.za@gmail.com>
Signed-off-by: Anders Larsen <al@alarsen.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The kernel does not compile for my ARM926EJ-S system U300 due to
the isb instruction inserted in generic assember statement from
commit 8925ec4c53, "ARM: 6385/1:
setup: detect aliasing I-cache when D-cache is non-aliasing"
hey the isb is only available when assembling for v7 so let's
use the generic isb() macro from setup.h instead.
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
When the feature PTS is not supported by CPU, the sysfile
package_power_limit_count for package should not be
generated.
This patch is used for fixing missing { and }.
The patch is not complete as there are other error handling
problems in this function - but that can wait until the
merge window.
Signed-off-by: Jin Dongming <jin.dongming@np.css.fujitsu.com>
Reviewed-by: Fenghua Yu <fenghua.yu@initel.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Cc: Brown Len <len.brown@intel.com>
Cc: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: lm-sensors@lm-sensors.org <lm-sensors@lm-sensors.org>
LKML-Reference: <4C7625D1.4060201@np.css.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
In case the pxa3xx-u2d driver isn't used, probing of ohci-pxa27x will cause an
ugly kernel crash (NULL pointer dereference in pxa3xx_u2d_start_hc(), because
struct u2d is NULL and clk_enable() call will crash the kernel, trying to access
it).
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Mark F. Brown <mark.brown314@gmail.com>
Cc: Haojian Zhuang <haojian.zhuang@marvell.com>
Cc: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
U2D Controller of pxa3xx is able to work in host mode.
Make pxa specific ohci implementation aware of it.
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
USB2.0 Device Controller (U2DC) which is found in Marvell PXA3xx.
U2DC supports both High and Full speed modes.
PXA320 and PXA300 U2DC supports only UTMI interface.
PXA310 U2DC supports only ULPI interface and has the OTG capability.
U2D Controller ULPI driver introduced in this patch supports only the
PXA310 USB Host via the ULPI.
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Serial drivers call get_clock() very early, before platform bus
has been set up, this requires a special check to let them get
a proper clock. Without this patch, a serial console is broken
on S5PV310 and S5PC210 boards.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[kgene.kim@samsung.com: fix coding-style]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
This patch adds header <linux/sched.h> into the below files for build with
CONFIG_PREEMPT_NONE.
arch/arm/mach-s5p6440/cpu.c
arch/arm/mach-s5p6442/cpu.c
arch/arm/mach-s5pc100/cpu.c
arch/arm/mach-s5pv210/cpu.c
Following is error message of in case of s5pv210_defconfig with CONFIG_PREEMPT_NONE.
arch/arm/mach-s5pv210/cpu.c:91: error: implicit declaration of function 'need_resched'
Signed-off-by: SeungChull Suh <sc.suh@samsung.com>
[kgene.kim@samsung.com: removed mach-s5p64x0/cpu.c]
[kgene.kim@samsung.com: added fix mach-s5p6440/cpu.c]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This patch removes following unused codes for removing build warnings.
arch/arm/plat-samsung/adc.c:438: warning: unused variable 'flags'
arch/arm/mach-s5pv210/clock.c:176: warning: 's5pv210_clk_ip4_ctrl' defined but not used
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
* 'hwpoison-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6:
HWPOISON: Stop shrinking at right page count
HWPOISON: Report correct address granuality for AO huge page errors
HWPOISON: Copy si_addr_lsb to user
page-types.c: fix name of unpoison interface
* 'for-linus' of git://neil.brown.name/md:
md: check return code of read_sb_page
md/raid1: minor bio initialisation improvements.
md/raid1: avoid overflow in raid1 resync when bitmap is in use.
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm: don't drop handle reference on unload
drm/ttm: Fix two race conditions + fix busy codepaths
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
of/i2c: Fix module load order issue caused by of_i2c.c
i2c: Fix checks which cause legacy suspend to never get called
i2c-pca: Fix waitforcompletion() return value
i2c: Fix for suspend/resume issue
i2c: Remove obsolete cleanup for clientdata
When proc_doulongvec_minmax() is used with an array of longs, and no
min/max check requested (.extra1 or .extra2 being NULL), we dereference a
NULL pointer for the second element of the array.
Noticed while doing some changes in network stack for the "16TB problem"
Fix is to not change min & max pointers in __do_proc_doulongvec_minmax(),
so that all elements of the vector share an unique min/max limit, like
proc_dointvec_minmax().
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Americo Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We need to check parent's thresholds if parent has use_hierarchy == 1 to
be sure that parent's threshold events will be triggered even if parent
itself is not active (no MEM_CGROUP_EVENTS).
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Reviewed-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Balbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
During boot of a 16TB system, the following is printed:
Dentry cache hash table entries: -2147483648 (order: 22, 17179869184 bytes)
Signed-off-by: Robin Holt <holt@sgi.com>
Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch add a LED class driver for LEDs found on the LaCie 2Big and
5Big Network v2 boards. The LEDs are wired to a CPLD and are controlled
through a GPIO extension bus.
Signed-off-by: Simon Guinot <sguinot@lacie.com>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
dev_set_drvdata() can't be used to set the driver private data pointer.
This would overwrite the led classdev object previously registered by
led_classdev_register().
Note that despite this mistake, the driver work fine because led_dat and
led_dat->cdev are at the same memory address.
Signed-off-by: Simon Guinot <sguinot@lacie.com>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
Many Atmel SOC are embedding a MACB controller. This patch removes the long
dependency line for this Atmel MACB ethernet driver configuration entry.
The HAVE_NET_MACB configuration option is located in the net Kconfig file
as it may be setup by ARM/AT91 and AVR32 chips.
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: David Miller <davem@davemloft.net>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
The simpler AT91x40 processors do not have the same power management
controller as the new AT91 devices. They do have a simpler power
controller module that we can use to disable the CPU clock at idle
time. Add code to support that.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
The board-sam9g20ek-2slot-mmc.c was a revision of the at91sam9g20ek
since board revision C. It contains 2 sd/mmc slots.
This merge keep the support of the old machine ID
MACH_AT91SAM9G20EK_2MMC for backward compatibility.
Now we use the ATAG to pass the hardware functionality to kernel
with this board revision encoding
bit 0:
0 => 1 sd/mmc slot
1 => 2 sd/mmc slots connectors (board from revision C)
system_rev tested on Barebox commit d8f3ee103a9f4bd
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
The MTD nand driver for Atmel chips is atmel_nand and not at91_nand anymore.
Change wrong configuration variables that were remaining.
Reported-by: Christoph Egger <siccegge@cs.fau.de>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Today the board use 2 machines id AT91SAM9G45EKES and AT91SAM9M10G45EK
now will use only AT91SAM9M10G45EK.
The other boards revision will be specified via system_rev.
for 9g45ekes, m10g45ekes and m10g45ek boards and revisions
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Patrice Vilchez <patrice.vilchez@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This reverts commit 5ed3bc7288.
It turns-out that not all drivers are calling ieee80211_tx_status from a
compatible context. Revert this for now and try again later...
Signed-off-by: John W. Linville <linville@tuxdriver.com>
We need to update the issue_seq on any grant operation, be it via an MDS
reply or a separate grant message. The update in the grant path was
missing. This broke cap release for inodes in which the MDS sent an
explicit grant message that was not soon after followed by a successful
MDS reply on the same inode.
Also fix the signedness on seq locals.
Signed-off-by: Sage Weil <sage@newdream.net>
If an MDS tries to revoke caps that we don't have, we want to send
releases early since they probably contain the caps message the MDS
is looking for.
Previously, we only sent the messages if we didn't have the inode either. But
in a multi-mds system we can retain the inode after dropping all caps for
a single MDS.
Signed-off-by: Greg Farnum <gregf@hq.newdream.net>
Signed-off-by: Sage Weil <sage@newdream.net>
encode_fh on error should update max_len with minimum required
size, so that caller can redo the call with the reallocated buffer.
This is required with open by handle patch series
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Sage Weil <sage@newdream.net>
encode_fh function should return 255 on error as done by other file
system to indicate EOVERFLOW. Also max_len is in sizeof(u32) units
and not in bytes.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Sage Weil <sage@newdream.net>
If we interrupt an osd request, we call __cancel_request, but it wasn't
verifying that req->r_osd was non-NULL before dereferencing it. This could
cause a crash if osds were flapping and we aborted a request on said osd.
Reported-by: Henry C Chang <henry_c_chang@tcloudcomputing.com>
Signed-off-by: Sage Weil <sage@newdream.net>
When we call the slab shrinker to free a page we need to stop at
page count one because the caller always holds a single reference, not zero.
This avoids useless looping over slab shrinkers and freeing too much
memory.
Reviewed-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
The SIGBUS user space signalling is supposed to report the
address granuality of a corruption. Pass this information correctly
for huge pages by querying the hpage order.
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
