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r: 298738
b: refs/heads/master
c: 314489b
h: refs/heads/master
v: v3
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Linus Torvalds committed Apr 6, 2012
1 parent ca6d644 commit 8177acd
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2 changes: 1 addition & 1 deletion [refs]
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@@ -1,2 +1,2 @@
---
refs/heads/master: a8f5b6e5ef0faf64997bfa87698aaabc989e64c4
refs/heads/master: 314489bd4c7780fde6a069783d5128f6cef52919
18 changes: 18 additions & 0 deletions trunk/Documentation/DMA-attributes.txt
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Expand Up @@ -31,3 +31,21 @@ may be weakly ordered, that is that reads and writes may pass each other.
Since it is optional for platforms to implement DMA_ATTR_WEAK_ORDERING,
those that do not will simply ignore the attribute and exhibit default
behavior.

DMA_ATTR_WRITE_COMBINE
----------------------

DMA_ATTR_WRITE_COMBINE specifies that writes to the mapping may be
buffered to improve performance.

Since it is optional for platforms to implement DMA_ATTR_WRITE_COMBINE,
those that do not will simply ignore the attribute and exhibit default
behavior.

DMA_ATTR_NON_CONSISTENT
-----------------------

DMA_ATTR_NON_CONSISTENT lets the platform to choose to return either
consistent or non-consistent memory as it sees fit. By using this API,
you are guaranteeing to the platform that you have all the correct and
necessary sync points for this memory in the driver.
17 changes: 17 additions & 0 deletions trunk/Documentation/DocBook/device-drivers.tmpl
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Expand Up @@ -446,4 +446,21 @@ X!Idrivers/video/console/fonts.c
!Edrivers/i2c/i2c-core.c
</chapter>

<chapter id="hsi">
<title>High Speed Synchronous Serial Interface (HSI)</title>

<para>
High Speed Synchronous Serial Interface (HSI) is a
serial interface mainly used for connecting application
engines (APE) with cellular modem engines (CMT) in cellular
handsets.

HSI provides multiplexing for up to 16 logical channels,
low-latency and full duplex communication.
</para>

!Iinclude/linux/hsi/hsi.h
!Edrivers/hsi/hsi.c
</chapter>

</book>
2 changes: 1 addition & 1 deletion trunk/Documentation/cgroups/cpusets.txt
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Expand Up @@ -217,7 +217,7 @@ and name space for cpusets, with a minimum of additional kernel code.

The cpus and mems files in the root (top_cpuset) cpuset are
read-only. The cpus file automatically tracks the value of
cpu_online_map using a CPU hotplug notifier, and the mems file
cpu_online_mask using a CPU hotplug notifier, and the mems file
automatically tracks the value of node_states[N_HIGH_MEMORY]--i.e.,
nodes with memory--using the cpuset_track_online_nodes() hook.

Expand Down
22 changes: 11 additions & 11 deletions trunk/Documentation/cpu-hotplug.txt
Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,7 @@ maxcpus=n Restrict boot time cpus to n. Say if you have 4 cpus, using
other cpus later online, read FAQ's for more info.

additional_cpus=n (*) Use this to limit hotpluggable cpus. This option sets
cpu_possible_map = cpu_present_map + additional_cpus
cpu_possible_mask = cpu_present_mask + additional_cpus

cede_offline={"off","on"} Use this option to disable/enable putting offlined
processors to an extended H_CEDE state on
Expand All @@ -64,33 +64,33 @@ should only rely on this to count the # of cpus, but *MUST* not rely
on the apicid values in those tables for disabled apics. In the event
BIOS doesn't mark such hot-pluggable cpus as disabled entries, one could
use this parameter "additional_cpus=x" to represent those cpus in the
cpu_possible_map.
cpu_possible_mask.

possible_cpus=n [s390,x86_64] use this to set hotpluggable cpus.
This option sets possible_cpus bits in
cpu_possible_map. Thus keeping the numbers of bits set
cpu_possible_mask. Thus keeping the numbers of bits set
constant even if the machine gets rebooted.

CPU maps and such
-----------------
[More on cpumaps and primitive to manipulate, please check
include/linux/cpumask.h that has more descriptive text.]

cpu_possible_map: Bitmap of possible CPUs that can ever be available in the
cpu_possible_mask: Bitmap of possible CPUs that can ever be available in the
system. This is used to allocate some boot time memory for per_cpu variables
that aren't designed to grow/shrink as CPUs are made available or removed.
Once set during boot time discovery phase, the map is static, i.e no bits
are added or removed anytime. Trimming it accurately for your system needs
upfront can save some boot time memory. See below for how we use heuristics
in x86_64 case to keep this under check.

cpu_online_map: Bitmap of all CPUs currently online. Its set in __cpu_up()
cpu_online_mask: Bitmap of all CPUs currently online. Its set in __cpu_up()
after a cpu is available for kernel scheduling and ready to receive
interrupts from devices. Its cleared when a cpu is brought down using
__cpu_disable(), before which all OS services including interrupts are
migrated to another target CPU.

cpu_present_map: Bitmap of CPUs currently present in the system. Not all
cpu_present_mask: Bitmap of CPUs currently present in the system. Not all
of them may be online. When physical hotplug is processed by the relevant
subsystem (e.g ACPI) can change and new bit either be added or removed
from the map depending on the event is hot-add/hot-remove. There are currently
Expand All @@ -99,22 +99,22 @@ at which time hotplug is disabled.

You really dont need to manipulate any of the system cpu maps. They should
be read-only for most use. When setting up per-cpu resources almost always use
cpu_possible_map/for_each_possible_cpu() to iterate.
cpu_possible_mask/for_each_possible_cpu() to iterate.

Never use anything other than cpumask_t to represent bitmap of CPUs.

#include <linux/cpumask.h>

for_each_possible_cpu - Iterate over cpu_possible_map
for_each_online_cpu - Iterate over cpu_online_map
for_each_present_cpu - Iterate over cpu_present_map
for_each_possible_cpu - Iterate over cpu_possible_mask
for_each_online_cpu - Iterate over cpu_online_mask
for_each_present_cpu - Iterate over cpu_present_mask
for_each_cpu_mask(x,mask) - Iterate over some random collection of cpu mask.

#include <linux/cpu.h>
get_online_cpus() and put_online_cpus():

The above calls are used to inhibit cpu hotplug operations. While the
cpu_hotplug.refcount is non zero, the cpu_online_map will not change.
cpu_hotplug.refcount is non zero, the cpu_online_mask will not change.
If you merely need to avoid cpus going away, you could also use
preempt_disable() and preempt_enable() for those sections.
Just remember the critical section cannot call any
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Original file line number Diff line number Diff line change
@@ -0,0 +1,29 @@
Anatop Voltage regulators

Required properties:
- compatible: Must be "fsl,anatop-regulator"
- anatop-reg-offset: Anatop MFD register offset
- anatop-vol-bit-shift: Bit shift for the register
- anatop-vol-bit-width: Number of bits used in the register
- anatop-min-bit-val: Minimum value of this register
- anatop-min-voltage: Minimum voltage of this regulator
- anatop-max-voltage: Maximum voltage of this regulator

Any property defined as part of the core regulator
binding, defined in regulator.txt, can also be used.

Example:

regulator-vddpu {
compatible = "fsl,anatop-regulator";
regulator-name = "vddpu";
regulator-min-microvolt = <725000>;
regulator-max-microvolt = <1300000>;
regulator-always-on;
anatop-reg-offset = <0x140>;
anatop-vol-bit-shift = <9>;
anatop-vol-bit-width = <5>;
anatop-min-bit-val = <1>;
anatop-min-voltage = <725000>;
anatop-max-voltage = <1300000>;
};
8 changes: 0 additions & 8 deletions trunk/Documentation/feature-removal-schedule.txt
Original file line number Diff line number Diff line change
Expand Up @@ -6,14 +6,6 @@ be removed from this file.

---------------------------

What: x86 floppy disable_hlt
When: 2012
Why: ancient workaround of dubious utility clutters the
code used by everybody else.
Who: Len Brown <len.brown@intel.com>

---------------------------

What: CONFIG_APM_CPU_IDLE, and its ability to call APM BIOS in idle
When: 2012
Why: This optional sub-feature of APM is of dubious reliability,
Expand Down
2 changes: 1 addition & 1 deletion trunk/Documentation/hwmon/k10temp
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Expand Up @@ -11,7 +11,7 @@ Supported chips:
Socket S1G2: Athlon (X2), Sempron (X2), Turion X2 (Ultra)
* AMD Family 12h processors: "Llano" (E2/A4/A6/A8-Series)
* AMD Family 14h processors: "Brazos" (C/E/G/Z-Series)
* AMD Family 15h processors: "Bulldozer"
* AMD Family 15h processors: "Bulldozer" (FX-Series), "Trinity"

Prefix: 'k10temp'
Addresses scanned: PCI space
Expand Down
1 change: 1 addition & 0 deletions trunk/Documentation/ioctl/ioctl-number.txt
Original file line number Diff line number Diff line change
Expand Up @@ -225,6 +225,7 @@ Code Seq#(hex) Include File Comments
'j' 00-3F linux/joystick.h
'k' 00-0F linux/spi/spidev.h conflict!
'k' 00-05 video/kyro.h conflict!
'k' 10-17 linux/hsi/hsi_char.h HSI character device
'l' 00-3F linux/tcfs_fs.h transparent cryptographic file system
<http://web.archive.org/web/*/http://mikonos.dia.unisa.it/tcfs>
'l' 40-7F linux/udf_fs_i.h in development:
Expand Down
24 changes: 14 additions & 10 deletions trunk/MAINTAINERS
Original file line number Diff line number Diff line change
Expand Up @@ -1251,7 +1251,6 @@ ATHEROS ATH5K WIRELESS DRIVER
M: Jiri Slaby <jirislaby@gmail.com>
M: Nick Kossifidis <mickflemm@gmail.com>
M: "Luis R. Rodriguez" <mcgrof@qca.qualcomm.com>
M: Bob Copeland <me@bobcopeland.com>
L: linux-wireless@vger.kernel.org
L: ath5k-devel@lists.ath5k.org
W: http://wireless.kernel.org/en/users/Drivers/ath5k
Expand Down Expand Up @@ -3557,17 +3556,13 @@ L: linux-pm@vger.kernel.org
S: Supported
F: arch/x86/platform/mrst/pmu.*

INTEL PRO/WIRELESS 2100 NETWORK CONNECTION SUPPORT
INTEL PRO/WIRELESS 2100, 2200BG, 2915ABG NETWORK CONNECTION SUPPORT
M: Stanislav Yakovlev <stas.yakovlev@gmail.com>
L: linux-wireless@vger.kernel.org
S: Orphan
S: Maintained
F: Documentation/networking/README.ipw2100
F: drivers/net/wireless/ipw2x00/ipw2100.*

INTEL PRO/WIRELESS 2915ABG NETWORK CONNECTION SUPPORT
L: linux-wireless@vger.kernel.org
S: Orphan
F: Documentation/networking/README.ipw2200
F: drivers/net/wireless/ipw2x00/ipw2200.*
F: drivers/net/wireless/ipw2x00/

INTEL(R) TRUSTED EXECUTION TECHNOLOGY (TXT)
M: Joseph Cihula <joseph.cihula@intel.com>
Expand Down Expand Up @@ -5642,7 +5637,7 @@ M: Ohad Ben-Cohen <ohad@wizery.com>
S: Maintained
F: drivers/remoteproc/
F: Documentation/remoteproc.txt
F: include/linux/remoteproc.txt
F: include/linux/remoteproc.h

RFKILL
M: Johannes Berg <johannes@sipsolutions.net>
Expand Down Expand Up @@ -6292,6 +6287,15 @@ F: drivers/tty/serial/sunsu.c
F: drivers/tty/serial/sunzilog.c
F: drivers/tty/serial/sunzilog.h

SPARSE CHECKER
M: "Christopher Li" <sparse@chrisli.org>
L: linux-sparse@vger.kernel.org
W: https://sparse.wiki.kernel.org/
T: git git://git.kernel.org/pub/scm/devel/sparse/sparse.git
T: git git://git.kernel.org/pub/scm/devel/sparse/chrisl/sparse.git
S: Maintained
F: include/linux/compiler.h

SPEAR PLATFORM SUPPORT
M: Viresh Kumar <viresh.kumar@st.com>
L: spear-devel@list.st.com
Expand Down
18 changes: 12 additions & 6 deletions trunk/arch/alpha/include/asm/dma-mapping.h
Original file line number Diff line number Diff line change
Expand Up @@ -12,16 +12,22 @@ static inline struct dma_map_ops *get_dma_ops(struct device *dev)

#include <asm-generic/dma-mapping-common.h>

static inline void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp)
#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL)

static inline void *dma_alloc_attrs(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp,
struct dma_attrs *attrs)
{
return get_dma_ops(dev)->alloc_coherent(dev, size, dma_handle, gfp);
return get_dma_ops(dev)->alloc(dev, size, dma_handle, gfp, attrs);
}

static inline void dma_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle)
#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)

static inline void dma_free_attrs(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle,
struct dma_attrs *attrs)
{
get_dma_ops(dev)->free_coherent(dev, size, vaddr, dma_handle);
get_dma_ops(dev)->free(dev, size, vaddr, dma_handle, attrs);
}

static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
Expand Down
10 changes: 6 additions & 4 deletions trunk/arch/alpha/kernel/pci-noop.c
Original file line number Diff line number Diff line change
Expand Up @@ -108,7 +108,8 @@ sys_pciconfig_write(unsigned long bus, unsigned long dfn,
}

static void *alpha_noop_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp)
dma_addr_t *dma_handle, gfp_t gfp,
struct dma_attrs *attrs)
{
void *ret;

Expand All @@ -123,7 +124,8 @@ static void *alpha_noop_alloc_coherent(struct device *dev, size_t size,
}

static void alpha_noop_free_coherent(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_addr)
void *cpu_addr, dma_addr_t dma_addr,
struct dma_attrs *attrs)
{
free_pages((unsigned long)cpu_addr, get_order(size));
}
Expand Down Expand Up @@ -174,8 +176,8 @@ static int alpha_noop_set_mask(struct device *dev, u64 mask)
}

struct dma_map_ops alpha_noop_ops = {
.alloc_coherent = alpha_noop_alloc_coherent,
.free_coherent = alpha_noop_free_coherent,
.alloc = alpha_noop_alloc_coherent,
.free = alpha_noop_free_coherent,
.map_page = alpha_noop_map_page,
.map_sg = alpha_noop_map_sg,
.mapping_error = alpha_noop_mapping_error,
Expand Down
10 changes: 6 additions & 4 deletions trunk/arch/alpha/kernel/pci_iommu.c
Original file line number Diff line number Diff line change
Expand Up @@ -434,7 +434,8 @@ static void alpha_pci_unmap_page(struct device *dev, dma_addr_t dma_addr,
else DMA_ADDRP is undefined. */

static void *alpha_pci_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_addrp, gfp_t gfp)
dma_addr_t *dma_addrp, gfp_t gfp,
struct dma_attrs *attrs)
{
struct pci_dev *pdev = alpha_gendev_to_pci(dev);
void *cpu_addr;
Expand Down Expand Up @@ -478,7 +479,8 @@ static void *alpha_pci_alloc_coherent(struct device *dev, size_t size,
DMA_ADDR past this call are illegal. */

static void alpha_pci_free_coherent(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_addr)
void *cpu_addr, dma_addr_t dma_addr,
struct dma_attrs *attrs)
{
struct pci_dev *pdev = alpha_gendev_to_pci(dev);
pci_unmap_single(pdev, dma_addr, size, PCI_DMA_BIDIRECTIONAL);
Expand Down Expand Up @@ -952,8 +954,8 @@ static int alpha_pci_set_mask(struct device *dev, u64 mask)
}

struct dma_map_ops alpha_pci_ops = {
.alloc_coherent = alpha_pci_alloc_coherent,
.free_coherent = alpha_pci_free_coherent,
.alloc = alpha_pci_alloc_coherent,
.free = alpha_pci_free_coherent,
.map_page = alpha_pci_map_page,
.unmap_page = alpha_pci_unmap_page,
.map_sg = alpha_pci_map_sg,
Expand Down
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