Proper description for Exynos4 bindings added to Documentation/devicetree/
bindings. It adds description to use multiple TMU instances, optional voltage
supply node and optional shared register across multiple TMU's.
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Signed-off-by: NLukasz Majewski <l.majewski@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

TMU probe function now checks for a device tree defined regulator.
For compatibility reasons it is allowed to probe driver even without
this regulator defined.
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NLukasz Majewski <l.majewski@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch adds support for h/w mode calibration in the TMU controller.
Soc's like 5440 support this features. The h/w bits needed for calibration
setting are same as that of enum calibration_type.
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch sets the second point trimming value according to the platform
data if the register value is 0.
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch adds configuration data for exynos5440 soc. Also register
definations for the controller are added.
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch modifies TMU controller to add changes needed to work with
exynos5440 platform. This sensor registers 3 instance of the tmu controller
with the thermal zone and hence reports 3 temperature output. This controller
supports upto five trip points. For critical threshold the driver uses the
core driver thermal framework for shutdown.
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Signed-off-by: NJungseok Lee <jays.lee@samsung.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch adds support to parse one more common set of TMU register. First
set of register belongs to each instance of TMU and second set belongs to
common TMU registers.
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch uses the device pointer stored in the configuration structure
and converts to dev_* prints and devm API's.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch adds several features supported by TMU as bitfields.
This features varies across different SOC type and comparing
the features present in the TMU is more logical than comparing
the soc itself.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch adds support to handle multiple instances of the TMU controllers.
This is done by removing the static structure to register with the core thermal
and creating it dynamically for each instance of the TMU controller. The
interrupt is made shared type to handle shared interrupts. Now since the ISR needs
the core thermal framework to be registered so request_irq is moved after the core
registration is done.
Also the identifier of the TMU controller is extracted from device tree alias. This
will be used for TMU specific initialisation.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

Recently non DT support from Exynos platform is removed and hence
removing non DT support from the driver also. This will help in easy
maintainence.
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This code simplifies the zone handling to use the trip information passed
by the TMU driver and not the hardcoded macros. This also helps in adding
more zone support.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch removes the error return in the bind/unbind routine
as the platform may not register any cpufreq cooling data.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch renames member private_data to driver_data of the thermal
zone registration structure as this item stores the driver related
data and uses it to call the driver related callbacks.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This code modifies the thermal driver to have multiple thermal zone
support by replacing the global thermal zone variable with device data
member of thermal_zone_device.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch uses the TMU status register to know the generated interrupts
and only clear them in the interrupt handler.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

TMU urgently sends active-high signal (thermal trip) to PMU, and thermal
tripping by hardware logic. Thermal tripping means that PMU cuts off the
whole power of SoC by controlling external voltage regulator.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NJonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch migrates the TMU register definition/bitfields to data file. This
is needed to support SoC's which use the same TMU controller but register
validity, offsets or bitfield may slightly vary across SOC's.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch adds entries min_efuse_value, max_efuse_value, default_temp_offset,
trigger_type, cal_type, trim_first_point, trim_second_point, max_trigger_level
trigger_enable in the TMU platform data structure. Also the driver is modified
to use the data passed by these new platform memebers instead of the constant
macros. All these changes helps in separating the SOC specific data part from
the TMU driver.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch adds some extra register bitfield definations and cleans
up the code to prepare for moving register macros and definations inside
the TMU data section. In this code cleanup the TMU enable bit is correctly used
as bit0 and bit1 is taken care which is reserve bit.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This code splits the exynos tmu driver code into SOC specific data parts.
This will simplify adding new SOC specific data to the same TMU controller.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch renames and moves include/linux/platform_data/exynos_thermal.h to
drivers/thermal/samsung/exynos_tmu.h. This file movement is needed as exynos
SOC's are not supporting non-DT based platforms and this file now just contains
exynos tmu driver related definations.
Also struct freq_clip_table is now moved to exynos_thermal_common.c as it fixes
the compilation issue occuring because now this new tmu header file is included
in tmu driver c file and not in the common thermal header file.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch renames exynos_thermal.c to exynos_tmu.c. This change is needed as
this file now just contains exynos tmu driver related codes and thermal zone
or cpufreq cooling registration related changes are not there anymore.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This code bifurcates exynos thermal implementation into common and sensor
specific parts. The common thermal code interacts with core thermal layer and
core cpufreq cooling parts and is independent of SOC specific driver. This
change is needed to cleanly add support for new TMU sensors.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch removes the dependency on CPU_THERMAL for compiling TMU driver.
This is useful for cases when only TMU controller needs to be initialised
without cpu cooling action.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This patch uses the recently added config sybmol ARCH_HAS_BANDGAP to enable
the TMU driver. This will allow adding support for new soc easily as now it
is the platform responsibility to enable this config symbol for a particular
soc.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

This movement of files is done for easy maintenance and adding more
new sensor's support for exynos platform easily . This will also help in
bifurcating exynos common, sensor driver and sensor data related parts.
Acked-by: NKukjin Kim <kgene.kim@samsung.com>
Acked-by: NJonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NEduardo Valentin <eduardo.valentin@ti.com>

Commit f1a18a10 "Thermal: CPU Package temperature thermal" had code
that did a get_online_cpus(), run a loop and then do a
put_online_cpus(). The problem is that the loop had an error exit that
would skip the put_online_cpus() part.

In the error exit part of the function, it also did a get_online_cpus(),
run a loop and then put_online_cpus(). The only way to get to the error
exit part is with get_online_cpus() already performed. If this error
condition is hit, the system will be prevented from taking CPUs offline.
The process taking the CPU offline will lock up hard.

Removing the get_online_cpus() removes the lockup as the hotplug CPU
refcount is back to zero.

This was bisected with ktest.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: NZhang Rui <rui.zhang@intel.com>

Although it is unlikley that physical package id is set to some
arbitary number, it is better to prevent in anycase. Since package
temp zones use this in thermal zone type and for allocation, added
a limit.
Signed-off-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: NZhang Rui <rui.zhang@intel.com>

If krealloc() returns NULL, it doesn't free the original. So any code
of the form 'foo = krealloc(foo, ...);' is almost certainly a bug.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NZhang Rui <rui.zhang@intel.com>

On systems with no package MSR support this caused crash as there
is a bug in the logic to check presence of DTHERM and PTS feature
together. Added a change so that when there is no PTS support, module
doesn't get loaded. Even if some CPU comes online with the PTS
feature disabled, and other CPUs has this support, this patch
will still prevent such MSR accesses.
Signed-off-by: NSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reported-by: NDaniel Walker <dwalker@fifo99.com>
Signed-off-by: NZhang Rui <rui.zhang@intel.com>

Pull ext4 bugfixes from Ted Ts'o:
 "Various regression and bug fixes for ext4"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: don't allow ext4_free_blocks() to fail due to ENOMEM
  ext4: fix spelling errors and a comment in extent_status tree
  ext4: rate limit printk in buffer_io_error()
  ext4: don't show usrquota/grpquota twice in /proc/mounts
  ext4: fix warning in ext4_evict_inode()
  ext4: fix ext4_get_group_number()
  ext4: silence warning in ext4_writepages()

Pull slab update from Pekka Enberg:
 "Highlights:

  - Fix for boot-time problems on some architectures due to
    init_lock_keys() not respecting kmalloc_caches boundaries
    (Christoph Lameter)

  - CONFIG_SLUB_CPU_PARTIAL requested by RT folks (Joonsoo Kim)

  - Fix for excessive slab freelist draining (Wanpeng Li)

  - SLUB and SLOB cleanups and fixes (various people)"

I ended up editing the branch, and this avoids two commits at the end
that were immediately reverted, and I instead just applied the oneliner
fix in between myself.

* 'slab/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/linux
  slub: Check for page NULL before doing the node_match check
  mm/slab: Give s_next and s_stop slab-specific names
  slob: Check for NULL pointer before calling ctor()
  slub: Make cpu partial slab support configurable
  slab: add kmalloc() to kernel API documentation
  slab: fix init_lock_keys
  slob: use DIV_ROUND_UP where possible
  slub: do not put a slab to cpu partial list when cpu_partial is 0
  mm/slub: Use node_nr_slabs and node_nr_objs in get_slabinfo
  mm/slub: Drop unnecessary nr_partials
  mm/slab: Fix /proc/slabinfo unwriteable for slab
  mm/slab: Sharing s_next and s_stop between slab and slub
  mm/slab: Fix drain freelist excessively
  slob: Rework #ifdeffery in slab.h
  mm, slab: moved kmem_cache_alloc_node comment to correct place

In the -rt kernel (mrg), we hit the following dump:

BUG: unable to handle kernel NULL pointer dereference at           (null)
IP: [<ffffffff811573f1>] kmem_cache_alloc_node+0x51/0x180
PGD a2d39067 PUD b1641067 PMD 0
Oops: 0000 [#1] PREEMPT SMP
Modules linked in: sunrpc cpufreq_ondemand ipv6 tg3 joydev sg serio_raw pcspkr k8temp amd64_edac_mod edac_core i2c_piix4 e100 mii shpchp ext4 mbcache jbd2 sd_mod crc_t10dif sr_mod cdrom sata_svw ata_generic pata_acpi pata_serverworks radeon ttm drm_kms_helper drm hwmon i2c_algo_bit i2c_core dm_mirror dm_region_hash dm_log dm_mod
CPU 3
Pid: 20878, comm: hackbench Not tainted 3.6.11-rt25.14.el6rt.x86_64 #1 empty empty/Tyan Transport GT24-B3992
RIP: 0010:[<ffffffff811573f1>]  [<ffffffff811573f1>] kmem_cache_alloc_node+0x51/0x180
RSP: 0018:ffff8800a9b17d70  EFLAGS: 00010213
RAX: 0000000000000000 RBX: 0000000001200011 RCX: ffff8800a06d8000
RDX: 0000000004d92a03 RSI: 00000000000000d0 RDI: ffff88013b805500
RBP: ffff8800a9b17dc0 R08: ffff88023fd14d10 R09: ffffffff81041cbd
R10: 00007f4e3f06e9d0 R11: 0000000000000246 R12: ffff88013b805500
R13: ffff8801ff46af40 R14: 0000000000000001 R15: 0000000000000000
FS:  00007f4e3f06e700(0000) GS:ffff88023fd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 00000000a2d3a000 CR4: 00000000000007e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process hackbench (pid: 20878, threadinfo ffff8800a9b16000, task ffff8800a06d8000)
Stack:
 ffff8800a9b17da0 ffffffff81202e08 ffff8800a9b17de0 000000d001200011
 0000000001200011 0000000001200011 0000000000000000 0000000000000000
 00007f4e3f06e9d0 0000000000000000 ffff8800a9b17e60 ffffffff81041cbd
Call Trace:
 [<ffffffff81202e08>] ? current_has_perm+0x68/0x80
 [<ffffffff81041cbd>] copy_process+0xdd/0x15b0
 [<ffffffff810a2125>] ? rt_up_read+0x25/0x30
 [<ffffffff8104369a>] do_fork+0x5a/0x360
 [<ffffffff8107c66b>] ? migrate_enable+0xeb/0x220
 [<ffffffff8100b068>] sys_clone+0x28/0x30
 [<ffffffff81527423>] stub_clone+0x13/0x20
 [<ffffffff81527152>] ? system_call_fastpath+0x16/0x1b
Code: 89 fc 89 75 cc 41 89 d6 4d 8b 04 24 65 4c 03 04 25 48 ae 00 00 49 8b 50 08 4d 8b 28 49 8b 40 10 4d 85 ed 74 12 41 83 fe ff 74 27 <48> 8b 00 48 c1 e8 3a 41 39 c6 74 1b 8b 75 cc 4c 89 c9 44 89 f2
RIP  [<ffffffff811573f1>] kmem_cache_alloc_node+0x51/0x180
 RSP <ffff8800a9b17d70>
CR2: 0000000000000000
---[ end trace 0000000000000002 ]---

Now, this uses SLUB pretty much unmodified, but as it is the -rt kernel
with CONFIG_PREEMPT_RT set, spinlocks are mutexes, although they do
disable migration. But the SLUB code is relatively lockless, and the
spin_locks there are raw_spin_locks (not converted to mutexes), thus I
believe this bug can happen in mainline without -rt features. The -rt
patch is just good at triggering mainline bugs ;-)

Anyway, looking at where this crashed, it seems that the page variable
can be NULL when passed to the node_match() function (which does not
check if it is NULL). When this happens we get the above panic.

As page is only used in slab_alloc() to check if the node matches, if
it's NULL I'm assuming that we can say it doesn't and call the
__slab_alloc() code. Is this a correct assumption?
Acked-by: NChristoph Lameter <cl@linux.com>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: NPekka Enberg <penberg@kernel.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Pull more vfs stuff from Al Viro:
 "O_TMPFILE ABI changes, Oleg's fput() series, misc cleanups, including
  making simple_lookup() usable for filesystems with non-NULL s_d_op,
  which allows us to get rid of quite a bit of ugliness"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  sunrpc: now we can just set ->s_d_op
  cgroup: we can use simple_lookup() now
  efivarfs: we can use simple_lookup() now
  make simple_lookup() usable for filesystems that set ->s_d_op
  configfs: don't open-code d_alloc_name()
  __rpc_lookup_create_exclusive: pass string instead of qstr
  rpc_create_*_dir: don't bother with qstr
  llist: llist_add() can use llist_add_batch()
  llist: fix/simplify llist_add() and llist_add_batch()
  fput: turn "list_head delayed_fput_list" into llist_head
  fs/file_table.c:fput(): add comment
  Safer ABI for O_TMPFILE

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>