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f689054aace2ff13af2e9a44a74fbba650ca31ba
erofs-linux/drivers/block
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Uros Bizjak 70ec04f348 zram: use try_cmpxchg in update_used_max 
Use try_cmpxchg instead of cmpxchg (*ptr, old, new) == old in
update_used_max.  x86 CMPXCHG instruction returns success in ZF flag, so
this change saves a compare after cmpxchg (and related move instruction in
front of cmpxchg).

Also, reorder code a bit to remove additional compare and conditional jump
from the assembly code.  Together, hese two changes save 15 bytes from the
function when compiled for x86_64.

No functional change intended.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Uros Bizjak <[email protected]>
Reviewed-by: Sergey Senozhatsky <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Nitin Gupta <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
2022-11-08 17:37:13 -08:00
..
aoe
block: aoe: use DEFINE_SHOW_ATTRIBUTE to simplify aoe_debugfs
2022-09-21 19:49:24 -06:00
drbd
Merge tag 'block-6.1-2022-10-20' of git://git.kernel.dk/linux
2022-10-21 15:14:14 -07:00
mtip32xx
block: move from strlcpy with unused retval to strscpy
2022-09-21 19:45:04 -06:00
null_blk
block: Change the return type of blk_mq_map_queues() into void
2022-08-22 10:07:53 -06:00
paride
block: Change the type of req_op() and bio_op() into enum req_op
2022-07-14 12:14:30 -06:00
rnbd
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
2022-10-07 12:05:29 -07:00
xen-blkback
Merge tag 'for-linus-6.0-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
2022-09-03 13:23:11 -07:00
zram
zram: use try_cmpxchg in update_used_max
2022-11-08 17:37:13 -08:00
amiflop.c
block: remove blk_cleanup_disk
2022-06-28 06:33:15 -06:00
ataflop.c
block: remove blk_cleanup_disk
2022-06-28 06:33:15 -06:00
brd.c
block: move from strlcpy with unused retval to strscpy
2022-09-21 19:45:04 -06:00
floppy.c
block/floppy: Fix a sparse warning
2022-07-14 12:14:31 -06:00
Kconfig
ublk_drv: comment on ublk_driver entry of Kconfig
2022-10-31 07:23:24 -06:00
loop.c
loop: Check for overflow while configuring loop
2022-08-24 06:52:52 -06:00
Makefile
remove the sx8 block driver
2022-08-02 17:22:46 -06:00
n64cart.c
block: remove blk_cleanup_disk
2022-06-28 06:33:15 -06:00
nbd.c
Merge tag 'driver-core-6.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
2022-10-07 17:04:10 -07:00
pktcdvd.c
block: change the blk_queue_split calling convention
2022-08-02 17:22:53 -06:00
ps3disk.c
block: remove blk_cleanup_disk
2022-06-28 06:33:15 -06:00
ps3vram.c
block: move from strlcpy with unused retval to strscpy
2022-09-21 19:45:04 -06:00
rbd_types.h
…
rbd.c
rbd: fix possible memory leak in rbd_sysfs_init()
2022-10-27 07:15:30 -06:00
sunvdc.c
block: remove blk_cleanup_disk
2022-06-28 06:33:15 -06:00
swim3.c
block: remove blk_cleanup_disk
2022-06-28 06:33:15 -06:00
swim_asm.S
…
swim.c
block: remove blk_cleanup_disk
2022-06-28 06:33:15 -06:00
ublk_drv.c
ublk_drv: add ublk_queue_cmd() for cleanup
2022-10-31 07:23:24 -06:00
virtio_blk.c
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
2022-10-10 14:02:53 -07:00
xen-blkfront.c
Merge tag 'for-linus-6.0-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
2022-09-03 13:23:11 -07:00
z2ram.c
block: remove blk_cleanup_disk
2022-06-28 06:33:15 -06:00