The sm750 driver in staging has no future as new framebuffer driver
will not be added to fbdev anymore. A drm driver is being prepared, and
the details added to the TODO file. This sm750fb driver will be removed
as soon as the drm driver is ready. Also, remove my old email.
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
An issue is observed where mallocs are failing due to overcommit failure.
The failure happens when there is high ION page pool since ION page
pool is not considered reclaimable by the overcommit calculation code.
This change considers ion pool pages as indirectly reclaimable and thus
accounted as available memory in the overcommit calculation.
Signed-off-by: Vijayanand Jitta <vjitta@codeaurora.org>
Acked-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In keys_fill, the key_set_version could be changed after
the keys are filled, then the keys in this context won't
be refilled by the following lu_context_refill for its
version is equal to the current key_set_version.
In lu_context_refill, the key_set_version should be protected
before comparing it to version stored in the lu_context.
Signed-off-by: Hongchao Zhang <hongchao.zhang@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8346
Reviewed-on: https://review.whamcloud.com/26099
Reviewed-on: https://review.whamcloud.com/27448
Reviewed-on: https://review.whamcloud.com/27994
Reviewed-by: Patrick Farrell <paf@cray.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com>
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hoist lu_keys_guard locking out of the for loop in lu_context_exit().
Signed-off-by: John L. Hammond <john.hammond@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8918
Reviewed-on: https://review.whamcloud.com/24217
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Most of the time, keys are never changed. So rwlock might be
better for the concurrency of key read.
Signed-off-by: Li Xi <lixi@ddn.com>
Signed-off-by: Gu Zheng <gzheng@ddn.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6800
Reviewed-on: http://review.whamcloud.com/15558
Reviewed-by: Faccini Bruno <bruno.faccini@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
cmid will be destroyed at OFED if kiblnd_cm_callback return error.
if error happen before the end of kiblnd_connect_peer, it will touch
destroyed cmid and fail as
(o2iblnd_cb.c:1315:kiblnd_connect_peer())
ASSERTION( cmid->device != ((void *)0) ) failed:
Signed-off-by: Alexander Boyko <alexander.boyko@seagate.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-10015
Reviewed-by: Alexey Lyashkov <c17817@cray.com>
Reviewed-by: Doug Oucharek <dougso@me.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>
Signed-off-by: Doug Oucharek <dougso@me.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The FastReg support in ko2iblnd was not unmapping pool items
causing the items to leak. In addition, the mapping code
is not growing the pool like we do with FMR.
This patch makes sure we are unmapping FastReg pool elements
when we are done with them. It also makes sure the pool
will grow when we depleat the pool.
Signed-off-by: Doug Oucharek <doug.s.oucharek@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-9472
Reviewed-on: https://review.whamcloud.com/27015
Reviewed-by: Andrew Perepechko <andrew.perepechko@seagate.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Doug Oucharek <dougso@me.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In ll_dir_ioctl(), the object lumv3 is firstly copied from the user space
using Its address, i.e., lumv1 = &lumv3. If the lmm_magic field of lumv3 is
LOV_USER_MAGIC_V3, lumv3 will be modified by the second copy from the user
space. The second copy is necessary, because the two versions (i.e.,
lov_user_md_v1 and lov_user_md_v3) have different data formats and lengths.
However, given that the user data resides in the user space, a malicious
user-space process can race to change the data between the two copies. By
doing so, the attacker can provide a data with an inconsistent version,
e.g., v1 version + v3 data. This can lead to logical errors in the
following execution in ll_dir_setstripe(), which performs different actions
according to the version specified by the field lmm_magic.
This patch rechecks the version field lmm_magic in the second copy. If the
version is not as expected, i.e., LOV_USER_MAGIC_V3, an error code will be
returned: -EINVAL.
Signed-off-by: Wenwen Wang <wang6495@umn.edu>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rather than storing the name of a namespace in the
hash table, store it directly in the namespace.
This will allow the hashtable to be changed to use
rhashtable.
Signed-off-by: NeilBrown <neilb@suse.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Andreas Dilger <andreas.dilger@dilger.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rename 'during_ip_time' to 'DURING_IP_TIME_OUT' to have uppercase letter
for macros(#define).
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Make use of is_broadcast_ether_addr() to check if mac address is broadcast
address. Remove static 'broadcast', as its not needed after use of
is_broadcast_ether_addr().
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cleanup patch to organize macro in a file together after #include
statements.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove the unnecessary file inclusion in the source code. Also follow
the convension to first include the system header then project specific
header files.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cleanup patch to remove the unused macro mentioned below. Also move
macro up along with other macro declaration.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Instead of using the intermediate variable to hold the value, now directly
using the allocated variable.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Using local variable instead of static varible 'del_beacon'. Also removed
the unnecessary 'if' check in handle_del_beacon().
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Changes to avoid the use of uppercase for function name.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Changes to avoid the use of uppercase for function name.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Changes to avoid the use of uppercase for function name.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cleanup patch to follow names as per linux coding style.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cleanup patch to remove the unnecessary comments used for file and functions
header.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use 'else if' in get_station(), as only one condition will statisfy.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Added changes to avoid line over 80 character issue in
remove_network_from_shadow().
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cleanup patch to remove the curly braces used in 'case' statement to follow as
per linux standard.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix below issue reported by checkpatch.pl script.
'Comparison to NULL could be written "priv->wilc_gtk[key_index]"'
'Comparison to NULL could be written "priv->wilc_ptk[key_index]"'
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If i < slot_id is initially true then it will remain true. Also,
as i is being decremented it will end up accessing memory out of
bounds.
Fix this by incrementing *i* instead of decrementing it.
Addresses-Coverity-ID: 1468454 ("Infinite loop")
Fixes: faa6576410 ("staging: wilc1000: refactor scan() to free kmalloc memory on failure cases")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
We should be allocating space for hidden_network_info structs. They are
slightly smaller than hidden_network structs. This bug doesn't cause a
runtime issue beyond the very small ammount of extra memory used.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fix "warning: cast to pointer from integer of different size" when
printing the region shm physical address. Use the %pa conversion
specifier and pass the resource by reference.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Arve Hjønnevåg <arve@android.com>
Cc: Todd Kjos <tkjos@android.com>
Cc: Martijn Coenen <maco@android.com>
Cc: Greg Hartman <ghartman@google.com>
Cc: devel@driverdev.osuosl.org
Cc: kernel-team@android.com
Signed-off-by: Alistair Strachan <astrachan@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Pull x86 fixes from Thomas Gleixner:
"Another set of x86 related updates:
- Fix the long broken x32 version of the IPC user space headers which
was noticed by Arnd Bergman in course of his ongoing y2038 work.
GLIBC seems to have non broken private copies of these headers so
this went unnoticed.
- Two microcode fixlets which address some more fallout from the
recent modifications in that area:
- Unconditionally save the microcode patch, which was only saved
when CPU_HOTPLUG was enabled causing failures in the late
loading mechanism
- Make the later loader synchronization finally work under all
circumstances. It was exiting early and causing timeout failures
due to a missing synchronization point.
- Do not use mwait_play_dead() on AMD systems to prevent excessive
power consumption as the CPU cannot go into deep power states from
there.
- Address an annoying sparse warning due to lost type qualifiers of
the vmemmap and vmalloc base address constants.
- Prevent reserving crash kernel region on Xen PV as this leads to
the wrong perception that crash kernels actually work there which
is not the case. Xen PV has its own crash mechanism handled by the
hypervisor.
- Add missing TLB cpuid values to the table to make the printout on
certain machines correct.
- Enumerate the new CLDEMOTE instruction
- Fix an incorrect SPDX identifier
- Remove stale macros"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/ipc: Fix x32 version of shmid64_ds and msqid64_ds
x86/setup: Do not reserve a crash kernel region if booted on Xen PV
x86/cpu/intel: Add missing TLB cpuid values
x86/smpboot: Don't use mwait_play_dead() on AMD systems
x86/mm: Make vmemmap and vmalloc base address constants unsigned long
x86/vector: Remove the unused macro FPU_IRQ
x86/vector: Remove the macro VECTOR_OFFSET_START
x86/cpufeatures: Enumerate cldemote instruction
x86/microcode: Do not exit early from __reload_late()
x86/microcode/intel: Save microcode patch unconditionally
x86/jailhouse: Fix incorrect SPDX identifier
Pull x86 pti fixes from Thomas Gleixner:
"A set of updates for the x86/pti related code:
- Preserve r8-r11 in int $0x80. r8-r11 need to be preserved, but the
int$80 entry code removed that quite some time ago. Make it correct
again.
- A set of fixes for the Global Bit work which went into 4.17 and
caused a bunch of interesting regressions:
- Triggering a BUG in the page attribute code due to a missing
check for early boot stage
- Warnings in the page attribute code about holes in the kernel
text mapping which are caused by the freeing of the init code.
Handle such holes gracefully.
- Reduce the amount of kernel memory which is set global to the
actual text and do not incidentally overlap with data.
- Disable the global bit when RANDSTRUCT is enabled as it
partially defeats the hardening.
- Make the page protection setup correct for vma->page_prot
population again. The adjustment of the protections fell through
the crack during the Global bit rework and triggers warnings on
machines which do not support certain features, e.g. NX"
* 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/entry/64/compat: Preserve r8-r11 in int $0x80
x86/pti: Filter at vma->vm_page_prot population
x86/pti: Disallow global kernel text with RANDSTRUCT
x86/pti: Reduce amount of kernel text allowed to be Global
x86/pti: Fix boot warning from Global-bit setting
x86/pti: Fix boot problems from Global-bit setting
Pull timer fixes from Thomas Gleixner:
"Two fixes from the timer departement:
- Fix a long standing issue in the NOHZ tick code which causes RB
tree corruption, delayed timers and other malfunctions. The cause
for this is code which modifies the expiry time of an enqueued
hrtimer.
- Revert the CLOCK_MONOTONIC/CLOCK_BOOTTIME unification due to
regression reports. Seems userspace _is_ relying on the documented
behaviour despite our hope that it wont"
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
Revert: Unify CLOCK_MONOTONIC and CLOCK_BOOTTIME
tick/sched: Do not mess with an enqueued hrtimer
Pull perf fixes from Thomas Gleixner:
"The perf update contains the following bits:
x86:
- Prevent setting freeze_on_smi on PerfMon V1 CPUs to avoid #GP
perf stat:
- Keep the '/' event modifier separator in fallback, for example when
fallbacking from 'cpu/cpu-cycles/' to user level only, where it
should become 'cpu/cpu-cycles/u' and not 'cpu/cpu-cycles/:u' (Jiri
Olsa)
- Fix PMU events parsing rule, improving error reporting for invalid
events (Jiri Olsa)
- Disable write_backward and other event attributes for !group events
in a group, fixing, for instance this group: '{cycles,msr/aperf/}:S'
that has leader sampling (:S) and where just the 'cycles', the
leader event, should have the write_backward attribute set, in this
case it all fails because the PMU where 'msr/aperf/' lives doesn't
accepts write_backward style sampling (Jiri Olsa)
- Only fall back group read for leader (Kan Liang)
- Fix core PMU alias list for x86 platform (Kan Liang)
- Print out hint for mixed PMU group error (Kan Liang)
- Fix duplicate PMU name for interval print (Kan Liang)
Core:
- Set main kernel end address properly when reading kernel and module
maps (Namhyung Kim)
perf mem:
- Fix incorrect entries and add missing man options (Sangwon Hong)
s/390:
- Remove s390 specific strcmp_cpuid_cmp function (Thomas Richter)
- Adapt 'perf test' case record+probe_libc_inet_pton.sh for s390
- Fix s390 undefined record__auxtrace_init() return value in 'perf
record' (Thomas Richter)"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel: Don't enable freeze-on-smi for PerfMon V1
perf stat: Fix duplicate PMU name for interval print
perf evsel: Only fall back group read for leader
perf stat: Print out hint for mixed PMU group error
perf pmu: Fix core PMU alias list for X86 platform
perf record: Fix s390 undefined record__auxtrace_init() return value
perf mem: Document incorrect and missing options
perf evsel: Disable write_backward for leader sampling group events
perf pmu: Fix pmu events parsing rule
perf stat: Keep the / modifier separator in fallback
perf test: Adapt test case record+probe_libc_inet_pton.sh for s390
perf list: Remove s390 specific strcmp_cpuid_cmp function
perf machine: Set main kernel end address properly
Replace the manual validity checks for the GPIO with the
gpio_is_valid().
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
In the current implementation, vchi_instance is inited during the first
call of bcm2835_audio_open_connection(), and is never freed. It causes a
memory leak when the module `snd_bcm2835` is removed.
Here is how this commit fixes it:
* the VCHI context (including vchi_instance) is created once in the
platform's devres
* the VCHI context is allocated and connected once during module_init()
* all created bcm2835_chips have a pointer to this VCHI context
* bcm2835_audio_open_connection() can access the VCHI context through the
associated bcm2835_chip
* the VCHI context is disconnected and freed once during module_exit()
After this commit is applied, I don't see other issues with the module's
init/exit, so I also remove the associated TODO task.
Steps to reproduce the memory leak before this commit:
~~~~
root@raspberrypi:/home/pi# aplay test0.wav
Playing WAVE 'test0.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Ster
^CAborted by signal Interrupt...
root@raspberrypi:/home/pi# rmmod snd_bcm2835
root@raspberrypi:/home/pi# modprobe snd_bcm2835
root@raspberrypi:/home/pi# aplay test0.wav
Playing WAVE 'test0.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Ster
^CAborted by signal Interrupt...
root@raspberrypi:/home/pi# echo scan > /sys/kernel/debug/kmemleak
root@raspberrypi:/home/pi# cat /sys/kernel/debug/kmemleak
unreferenced object 0xb6794c00 (size 128):
comm "aplay", pid 406, jiffies 36870 (age 116.650s)
hex dump (first 32 bytes):
08 a5 82 81 01 00 00 00 08 4c 79 b6 08 4c 79 b6 .........Ly..Ly.
00 00 00 00 00 00 00 00 ad 4e ad de ff ff ff ff .........N......
backtrace:
[<802af5e0>] kmem_cache_alloc_trace+0x294/0x3d0
[<806ce620>] vchiq_initialise+0x98/0x1b0
[<806d0b34>] vchi_initialise+0x24/0x34
[<7f1311ec>] 0x7f1311ec
[<7f1303bc>] 0x7f1303bc
[<7f130590>] 0x7f130590
[<7f111fd8>] snd_pcm_open_substream+0x68/0xc4 [snd_pcm]
[<7f112108>] snd_pcm_open+0xd4/0x248 [snd_pcm]
[<7f112334>] snd_pcm_playback_open+0x4c/0x6c [snd_pcm]
[<7f0e250c>] snd_open+0xa8/0x14c [snd]
[<802ce590>] chrdev_open+0xac/0x188
[<802c57b4>] do_dentry_open+0x10c/0x314
[<802c6ba8>] vfs_open+0x5c/0x88
[<802d9a68>] path_openat+0x368/0x944
[<802dacd4>] do_filp_open+0x70/0xc4
[<802c6f70>] do_sys_open+0x110/0x1d4
~~~~
Signed-off-by: Kirill Marinushkin <k.marinushkin@gmail.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Ray Jui <rjui@broadcom.com>
Cc: Scott Branden <sbranden@broadcom.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: linux-rpi-kernel@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: devel@driverdev.osuosl.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
First of all devm_memremap() function returns an error pointer, it
doesn't return NULL. And second we need to set the error code on these
paths.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch is to support phc_index of ethtool_ts_info.
Also make the rtc drvier depend on FSL_DPAA2_ETH because
this driver is only useful when PTP programs are getting
hardware time stamps on the PTP Ethernet packets using the
SO_TIMESTAMPING API.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Since hardware timestmaping has been supported in driver, this
patch is to add the get_ts_info interface for ethtool to show
timestamping capability.
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hardware timestamping is supported both on Rx and Tx paths.
On Rx, timestamping is enabled for all frames. On Tx, we
only instruct the hardware to timestamp the frames marked
accordingly by the stack.
Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 fixes from Ted Ts'o:
"Fix misc bugs and a regression for ext4"
* tag 'for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: add MODULE_SOFTDEP to ensure crc32c is included in the initramfs
ext4: fix bitmap position validation
ext4: set h_journal if there is a failure starting a reserved handle
ext4: prevent right-shifting extents beyond EXT_MAX_BLOCKS
The comment claims that this helper will try not to loose bits, but for
64bit long it looses the high bits before hashing 64bit long into 32bit
int. Use the helper hash_long() to do the right thing for 64bit long.
For 32bit long, there is no change.
All the callers of end_name_hash() either assign the result to
qstr->hash, which is u32 or return the result as an int value (e.g.
full_name_hash()). Change the helper return type to int to conform to
its users.
[ It took me a while to apply this, because my initial reaction to it
was - incorrectly - that it could make for slower code.
After having looked more at it, I take back all my complaints about
the patch, Amir was right and I was mis-reading things or just being
stupid.
I also don't worry too much about the possible performance impact of
this on 64-bit, since most architectures that actually care about
performance end up not using this very much (the dcache code is the
most performance-critical, but the word-at-a-time case uses its own
hashing anyway).
So this ends up being mostly used for filesystems that do their own
degraded hashing (usually because they want a case-insensitive
comparison function).
A _tiny_ worry remains, in that not everybody uses DCACHE_WORD_ACCESS,
and then this potentially makes things more expensive on 64-bit
architectures with slow or lacking multipliers even for the normal
case.
That said, realistically the only such architecture I can think of is
PA-RISC. Nobody really cares about performance on that, it's more of a
"look ma, I've got warts^W an odd machine" platform.
So the patch is fine, and all my initial worries were just misplaced
from not looking at this properly. - Linus ]
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The AFFS filesystem is still in use by m68k community (Link #2), but as
there was no code activity and no maintainer, the filesystem appeared on
the list of candidates for staging/removal (Link #1).
I volunteer to act as a maintainer of AFFS to collect any fixes that
might show up and to guard fs/affs/ against another spring cleaning.
Link: https://lkml.kernel.org/r/20180425154602.GA8546@bombadil.infradead.org
Link: https://lkml.kernel.org/r/1613268.lKBQxPXt8J@merkaba
CC: Martin Steigerwald <martin@lichtvoll.de>
CC: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Sudip Mukherjee