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9487a0f6855c1a28e4e39d41545cd19ed417c015
linux/drivers/md
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Uros Bizjak 9487a0f685 raid5-cache: use try_cmpxchg in r5l_wake_reclaim 
Use try_cmpxchg instead of cmpxchg (*ptr, old, new) == old in
r5l_wake_reclaim. 86 CMPXCHG instruction returns success in ZF flag, so
this change saves a compare after cmpxchg (and related move instruction in
front of cmpxchg).

Also, try_cmpxchg implicitly assigns old *ptr value to "old" when cmpxchg
fails. There is no need to re-read the value in the loop.

Note that the value from *ptr should be read using READ_ONCE to prevent
the compiler from merging, refetching or reordering the read.

No functional change intended.

Cc: Song Liu <song@kernel.org>
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Song Liu <song@kernel.org>
2022-11-14 09:35:50 -08:00
..
bcache
treewide: use prandom_u32_max() when possible, part 1
2022-10-11 17:42:55 -06:00
persistent-data
dm bufio: Add flags argument to dm_bufio_client_create
2022-07-28 17:46:14 -04:00
dm-audit.c
dm: introduce audit event module for device mapper
2021-10-27 16:53:47 -04:00
dm-audit.h
dm: introduce audit event module for device mapper
2021-10-27 16:53:47 -04:00
dm-bio-prison-v1.c
…
dm-bio-prison-v1.h
…
dm-bio-prison-v2.c
…
dm-bio-prison-v2.h
…
dm-bio-record.h
block: move integrity handling out of <linux/blkdev.h>
2021-10-18 06:17:02 -06:00
dm-bufio.c
dm bufio: use the acquire memory barrier when testing for B_READING
2022-10-18 12:38:16 -04:00
dm-builtin.c
…
dm-cache-background-tracker.c
…
dm-cache-background-tracker.h
…
dm-cache-block-types.h
…
dm-cache-metadata.c
dm cache metadata: remove unnecessary variable in __dump_mapping
2022-05-09 15:40:10 -04:00
dm-cache-metadata.h
dm cache: fix typo in 2 comment blocks
2022-07-07 11:49:37 -04:00
dm-cache-policy-internal.h
…
dm-cache-policy-smq.c
dm cache policy smq: make static read-only array table const
2022-02-22 10:35:53 -05:00
dm-cache-policy.c
…
dm-cache-policy.h
dm cache: delete the redundant word 'each' in comment
2022-10-18 17:17:47 -04:00
dm-cache-target.c
dm cache: fix typo in 2 comment blocks
2022-07-07 11:49:37 -04:00
dm-clone-metadata.c
dm clone metadata: remove unused function
2021-04-19 13:20:31 -04:00
dm-clone-metadata.h
…
dm-clone-target.c
dm clone: Fix typo in block_device format specifier
2022-10-18 17:17:48 -04:00
dm-core.h
dm table: audit all dm_table_get_target() callers
2022-07-07 11:49:34 -04:00
dm-crypt.c
dm crypt: make printing of the key constant-time
2022-05-09 12:34:03 -04:00
dm-delay.c
dm: simplify basic targets
2022-05-05 17:31:35 -04:00
dm-dust.c
dm: use bdev_nr_sectors and bdev_nr_bytes instead of open coding them
2021-10-18 14:43:22 -06:00
dm-ebs-target.c
Merge tag 'for-6.0/dm-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2022-08-06 11:09:55 -07:00
dm-era-target.c
dm era: commit metadata in postsuspend after worker stops
2022-06-21 13:35:01 -04:00
dm-exception-store.c
…
dm-exception-store.h
dm: use bdev_nr_sectors and bdev_nr_bytes instead of open coding them
2021-10-18 14:43:22 -06:00
dm-flakey.c
dm/dm-flakey: Use the new blk_opf_t type
2022-07-14 12:14:31 -06:00
dm-ima.c
dm table: audit all dm_table_get_target() callers
2022-07-07 11:49:34 -04:00
dm-ima.h
dm ima: add version info to dm related events in ima log
2021-08-20 15:59:47 -04:00
dm-init.c
…
dm-integrity.c
Merge tag 'for-6.0/dm-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2022-08-06 11:09:55 -07:00
dm-io-rewind.c
dm: add two stage requeue mechanism
2022-07-07 11:49:32 -04:00
dm-io-tracker.h
dm writecache: make writeback pause configurable
2021-06-28 16:30:13 -04:00
dm-io.c
dm/core: Combine request operation type and flags
2022-07-14 12:14:31 -06:00
dm-ioctl.c
dm: change from DMWARN to DMERR or DMCRIT for fatal errors
2022-10-18 17:16:00 -04:00
dm-kcopyd.c
Merge tag 'for-6.0/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2022-08-02 14:21:25 -07:00
dm-linear.c
Merge tag 'libnvdimm-for-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
2022-05-27 15:49:30 -07:00
dm-log-userspace-base.c
dm: update target status functions to support IMA measurement
2021-08-10 13:34:23 -04:00
dm-log-userspace-transfer.c
…
dm-log-userspace-transfer.h
…
dm-log-writes.c
Merge tag 'libnvdimm-for-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
2022-05-27 15:49:30 -07:00
dm-log.c
dm mirror log: Use the new blk_opf_t type
2022-07-14 12:14:31 -06:00
dm-mpath.c
dm mpath: provide high-resolution timer to HST for bio-based
2022-05-09 15:39:23 -04:00
dm-mpath.h
…
dm-path-selector.c
…
dm-path-selector.h
dm mpath: provide high-resolution timer to HST for bio-based
2022-05-09 15:39:23 -04:00
dm-ps-historical-service-time.c
dm mpath: provide high-resolution timer to HST for bio-based
2022-05-09 15:39:23 -04:00
dm-ps-io-affinity.c
dm: update target status functions to support IMA measurement
2021-08-10 13:34:23 -04:00
dm-ps-queue-length.c
dm: update target status functions to support IMA measurement
2021-08-10 13:34:23 -04:00
dm-ps-round-robin.c
dm: update target status functions to support IMA measurement
2021-08-10 13:34:23 -04:00
dm-ps-service-time.c
dm: update target status functions to support IMA measurement
2021-08-10 13:34:23 -04:00
dm-raid1.c
dm/core: Reduce the size of struct dm_io_request
2022-07-14 12:14:31 -06:00
dm-raid.c
dm raid: fix typo in analyse_superblocks code comment
2022-10-18 17:17:47 -04:00
dm-region-hash.c
…
dm-rq.c
dm: change from DMWARN to DMERR or DMCRIT for fatal errors
2022-10-18 17:16:00 -04:00
dm-rq.h
…
dm-snap-persistent.c
Merge tag 'for-6.0/dm-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2022-08-06 11:09:55 -07:00
dm-snap-transient.c
dm: update target status functions to support IMA measurement
2021-08-10 13:34:23 -04:00
dm-snap.c
dm snapshot: fix typo in snapshot_map() comment
2022-07-07 11:49:39 -04:00
dm-stats.c
dm: change from DMWARN to DMERR or DMCRIT for fatal errors
2022-10-18 17:16:00 -04:00
dm-stats.h
dm stats: fix too short end duration_ns when using precise_timestamps
2022-02-21 15:35:39 -05:00
dm-stripe.c
dax: add .recovery_write dax_operation
2022-05-16 13:37:59 -07:00
dm-switch.c
dm: use bdev_nr_sectors and bdev_nr_bytes instead of open coding them
2021-10-18 14:43:22 -06:00
dm-sysfs.c
dm sysfs: use default_groups in kobj_type
2022-01-06 09:48:55 -05:00
dm-table.c
dm: change from DMWARN to DMERR or DMCRIT for fatal errors
2022-10-18 17:16:00 -04:00
dm-target.c
dax: introduce DAX_RECOVERY_WRITE dax access mode
2022-05-16 13:35:56 -07:00
dm-thin-metadata.c
dm thin: fix use-after-free crash in dm_sm_register_threshold_callback
2022-07-15 18:09:14 -04:00
dm-thin-metadata.h
dm thin metadata: remove unused dm_thin_remove_block and __remove
2022-02-22 13:55:50 -05:00
dm-thin.c
dm thin: fix use-after-free crash in dm_sm_register_threshold_callback
2022-07-15 18:09:14 -04:00
dm-uevent.c
…
dm-uevent.h
…
dm-unstripe.c
dm: update target status functions to support IMA measurement
2021-08-10 13:34:23 -04:00
dm-verity-fec.c
dm bufio: Add flags argument to dm_bufio_client_create
2022-07-28 17:46:14 -04:00
dm-verity-fec.h
dm verity fec: fix misaligned RS roots IO
2021-04-14 14:28:29 -04:00
dm-verity-loadpin.c
dm: verity-loadpin: Only trust verity targets with enforcement
2022-09-07 16:37:27 -07:00
dm-verity-target.c
dm verity: enable WQ_HIGHPRI on verify_wq
2022-10-18 17:17:47 -04:00
dm-verity-verify-sig.c
dm verity: fix require_signatures module_param permissions
2021-05-25 16:14:05 -04:00
dm-verity-verify-sig.h
…
dm-verity.h
dm: verity-loadpin: Only trust verity targets with enforcement
2022-09-07 16:37:27 -07:00
dm-writecache.c
Merge tag 'for-6.0/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2022-08-11 19:46:48 -07:00
dm-zero.c
dm: add support for REQ_NOWAIT to various targets
2020-12-04 18:04:35 -05:00
dm-zone.c
Merge tag 'for-6.0/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2022-08-02 14:21:25 -07:00
dm-zoned-metadata.c
Merge tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2022-08-05 16:32:45 -07:00
dm-zoned-reclaim.c
dm kcopyd: avoid useless atomic operations
2021-06-04 12:07:24 -04:00
dm-zoned-target.c
dm-zoned: cleanup dmz_fixup_devices
2022-07-06 06:46:26 -06:00
dm-zoned.h
dm/dm-zoned: Use the enum req_op type
2022-07-14 12:14:31 -06:00
dm.c
dm: remove unnecessary assignment statement in alloc_dev()
2022-10-18 17:17:48 -04:00
dm.h
dm table: audit all dm_table_get_target() callers
2022-07-07 11:49:34 -04:00
Kconfig
blk-mq: make the blk-mq stacking code optional
2022-02-16 19:39:09 -07:00
Makefile
Merge tag 'hardening-v5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
2022-08-02 14:38:59 -07:00
md-autodetect.c
md: return the allocated devices from md_alloc
2022-08-02 17:22:46 -06:00
md-bitmap.c
drivers/md/md-bitmap: check the return value of md_bitmap_get_counter()
2022-11-14 09:35:49 -08:00
md-bitmap.h
…
md-cluster.c
fs: dlm: remove DLM_LSFL_FS from uapi
2022-08-23 14:54:54 -05:00
md-cluster.h
…
md-faulty.c
block: pass a block_device to bio_clone_fast
2022-02-04 07:43:18 -07:00
md-linear.c
md: remove most calls to bdevname
2022-05-22 23:07:21 -07:00
md-linear.h
…
md-multipath.c
md: remove most calls to bdevname
2022-05-22 23:07:21 -07:00
md-multipath.h
…
md.c
Merge tag 'for-6.1/block-2022-10-03' of git://git.kernel.dk/linux
2022-10-07 09:19:14 -07:00
md.h
md: return the allocated devices from md_alloc
2022-08-02 17:22:46 -06:00
raid0.c
md: Replace snprintf with scnprintf
2022-09-22 00:05:03 -07:00
raid0.h
…
raid1-10.c
md: raid1/raid10: drop pending_cnt
2022-03-08 15:16:54 -08:00
raid1.c
md/raid1: Use the new blk_opf_t type
2022-07-14 12:14:31 -06:00
raid1.h
md: raid1/raid10: drop pending_cnt
2022-03-08 15:16:54 -08:00
raid5-cache.c
raid5-cache: use try_cmpxchg in r5l_wake_reclaim
2022-11-14 09:35:50 -08:00
raid5-log.h
md/raid5-ppl: Drop unused argument from ppl_handle_flush_request()
2022-08-02 17:14:31 -06:00
raid5-ppl.c
md/raid5-ppl: Drop unused argument from ppl_handle_flush_request()
2022-08-02 17:14:31 -06:00
raid5.c
md/raid5: Wait for MD_SB_CHANGE_PENDING in raid5d
2022-09-22 00:05:06 -07:00
raid5.h
md/raid5: Cleanup prototype of raid5_get_active_stripe()
2022-09-22 00:05:04 -07:00
raid10.c
Merge tag 'for-6.1/block-2022-10-03' of git://git.kernel.dk/linux
2022-10-07 09:19:14 -07:00
raid10.h
md/raid10: convert resync_lock to use seqlock
2022-09-22 00:05:05 -07:00