cpufreq: Persist cpufreq time in state data across hotplug

Cpufreq time_in_state data for all CPUs is made persistent across
hotplug and exposed to userspace via sysfs file
/sys/devices/system/cpu/cpufreq/all_time_in_state

Change-Id: I97cb5de24b6de16189bf8b5df9592d0a6e6ddf32
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
prctl: adds the capable(CAP_SYS_NICE) check to PR_SET_TIMERSLACK_PID.

Adds a capable() check to make sure that arbitary apps do not change the
timer slack for other apps.

Bug: 15000427
Change-Id: I558a2551a0e3579c7f7e7aae54b28aa9d982b209
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
net: wireless: Increase scan entry expiration to fit new scan time

Change-Id: I0e23ce45d78d7c17633670973f49943a5ed6032d
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
DMA: PL330: Fix racy mutex unlock

pl330_update() stores a pointer to the thrd->req that finished, which
contains a pointer to the corresponding pl330_req.  This is done with
the pl330_lock held.  Then, it iterates through the req_done list,
calling the callback for each of the requests that are done.  The
problem is that the driver releases the lock before calling the
callback for each of the callbacks.  pl330_submit_req() running in
another processor can then acquire the lock and insert another request
in one of the thrd->req that hasn't been processed yet, replacing the
pointer to pl330_req there.  When the callback returns in
pl330_update() and the next rqdone is popped from the list, it
dereferences the pl330_req pointer to the just scheduled pl330_req,
instead of the one that has finished, calling pl330 with the wrong r.

This patch fixes this by storing the pointer to pl330_req directly in
the list.

(cherry picked from commit fdec53d5203ee3d44be7c09d1524e3a6287d46a7 from
android-3.10)

Bug: 15828462
Bug: 15859101
Change-Id: Icb6f7bc08fd372c8688fd157eda6add721d43c29
Signed-off-by: Javi Merino <javi.merino@arm.com>
Cc: Jassi Brar <jaswinder.singh@linaro.org>
Acked-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
mm: add a field to store names for private anonymous memory

Userspace processes often have multiple allocators that each do
anonymous mmaps to get memory.  When examining memory usage of
individual processes or systems as a whole, it is useful to be
able to break down the various heaps that were allocated by
each layer and examine their size, RSS, and physical memory
usage.

This patch adds a user pointer to the shared union in
vm_area_struct that points to a null terminated string inside
the user process containing a name for the vma.  vmas that
point to the same address will be merged, but vmas that
point to equivalent strings at different addresses will
not be merged.

Userspace can set the name for a region of memory by calling
prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, start, len, (unsigned
long)name);
Setting the name to NULL clears it.

The names of named anonymous vmas are shown in /proc/pid/maps
as [anon:<name>] and in /proc/pid/smaps in a new "Name" field
that is only present for named vmas.  If the userspace pointer
is no longer valid all or part of the name will be replaced
with "<fault>".

The idea to store a userspace pointer to reduce the complexity
within mm (at the expense of the complexity of reading
/proc/pid/mem) came from Dave Hansen.  This results in no
runtime overhead in the mm subsystem other than comparing
the anon_name pointers when considering vma merging.  The pointer
is stored in a union with fieds that are only used on file-backed
mappings, so it does not increase memory usage.

Change-Id: Ie2ffc0967d4ffe7ee4c70781313c7b00cf7e3092
Signed-off-by: Colin Cross <ccross@android.com>
cpufreq: fix sleeping in atomic context when realloc freq_table for all_time_in_state

Commit 40cf2f8 (cpufreq: Persist cpufreq time in state data across
hotplug)
causes the following call trace to be spit on boot:

BUG: sleeping function called from invalid context at mm/slub.c:936
in_atomic(): 1, irqs_disabled(): 0, pid: 1, name: swapper/0
CPU: 6 PID: 1 Comm: swapper/0 Not tainted 3.10.9-20140624.172707-eng-gd6c0f69-dirty #50
Backtrace:
[<c0012270>] (dump_backtrace+0x0/0x10c) from [<c001256c>]
(show_stack+0x18/0x1c)
 r6:ffff1788 r5:c0c020c0 r4:e609c000 r3:00000000
[<c0012554>] (show_stack+0x0/0x1c) from [<c07a2970>]
(dump_stack+0x20/0x28)
[<c07a2950>] (dump_stack+0x0/0x28) from [<c0057678>]
(__might_sleep+0x104/0x120)
[<c0057574>] (__might_sleep+0x0/0x120) from [<c00ff000>]
(__kmalloc_track_caller+0x144/0x274)
 r6:00000000 r5:e609c000 r4:e6802140
[<c00feebc>] (__kmalloc_track_caller+0x0/0x274) from [<c00da098>]
(krealloc+0x58/0xb0)
[<c00da040>] (krealloc+0x0/0xb0) from [<c050266c>]
(cpufreq_allstats_create+0x120/0x204)
 r8:e4c4ff00 r7:c0d266b8 r6:0013d620 r5:e4c4e600 r4:00000001
r3:e535d6d0
[<c050254c>] (cpufreq_allstats_create+0x0/0x204) from [<c0502e38>]
(cpufreq_stat_notifier_policy+0xb8/0xd0)
[<c0502d80>] (cpufreq_stat_notifier_policy+0x0/0xd0) from [<c00517cc>]
(notifier_call_chain+0x4c/0x8c)
 r5:00000000 r4:fffffffe
[<c0051780>] (notifier_call_chain+0x0/0x8c) from [<c00519fc>]
(__blocking_notifier_call_chain+0x50/0x68)
 r8:c0cd4d00 r7:00000002 r6:e609dd7c r5:ffffffff r4:c0d25a4c
r3:ffffffff
[<c00519ac>] (__blocking_notifier_call_chain+0x0/0x68) from [<c0051a34>]
(blocking_notifier_call_chain+0x20/0x28)
 r7:c0e24f30 r6:00000000 r5:e53e1e00 r4:e609dd7c
[<c0051a14>] (blocking_notifier_call_chain+0x0/0x28) from [<c0500fec>]
(__cpufreq_set_policy+0xc0/0x1d0)
[<c0500f2c>] (__cpufreq_set_policy+0x0/0x1d0) from [<c0501308>]
(cpufreq_add_dev_interface+0x20c/0x270)
 r7:00000008 r6:00000000 r5:e53e1e00 r4:e53e1e58
[<c05010fc>] (cpufreq_add_dev_interface+0x0/0x270) from [<c05016a8>]
(cpufreq_add_dev+0x33c/0x420)
[<c050136c>] (cpufreq_add_dev+0x0/0x420) from [<c03604a4>]
(subsys_interface_register+0x80/0xbc)
[<c0360424>] (subsys_interface_register+0x0/0xbc) from [<c050035c>]
(cpufreq_register_driver+0x8c/0x194)

Change-Id: If77a656d0ea60a8fc4083283d104509fa6c07f8f
Signed-off-by: Minsung Kim <ms925.kim@samsung.com>
s3c2410_wdt: Add locking to cpu frequency transition notifier

Signed-of-by: Mark Salyzyn <salyzyn@google.com>
Bug: 8173205
Change-Id: I72b2571909fb464ae47a35922049b40eb0486d53
mm.h : fixed a derp
net: core: Support UID-based routing.

This contains the following commits:

1. 0149763 net: core: Add a UID range to fib rules.
2. 1650474 net: core: Use the socket UID in routing lookups.
3. 0b16771 net: ipv4: Add the UID to the route cache.
4. ee058f1 net: core: Add a RTA_UID attribute to routes.
    This is so that userspace can do per-UID route lookups.

Bug: 15413527
Change-Id: I1285474c6734614d3bda6f61d88dfe89a4af7892
Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Handle 'sk' being NULL in UID-based routing.

Bug: 15413527
Change-Id: If33bebb7b52c0ebfa8dac2452607bce0c2b0faa0
Signed-off-by: Sreeram Ramachandran <sreeram@google.com>
usb: gadget: f_accessory: Enabled Zero Length Packet (ZLP) for acc_write

Accessory connected to Android Device requires
Zero Length Packet (ZLP) to be written when data
transferred out from the Android device are multiples
of wMaxPacketSize (64bytes (Full-Speed) / 512bytes (High-Speed))
to end the transfer.

Change-Id: Ib2c2c0ab98ef9afa10e74a720142deca5c0ed476
Signed-off-by: Anson Jacob <ansonkuzhumbil@gmail.com>