[PATCH v4 00/24] seqlock: Extend seqcount API with associated locks

Ahmed S. Darwish
2020-07-20T15:55:44Z

Hi,

This is v4 of the seqlock patch series:

[PATCH v1 00/25]
https://lore.kernel.org/lkml/20200519214547.352050-1-a.darwish@linutronix.de

[PATCH v2 00/06] (bugfixes-only, merged)
https://lore.kernel.org/lkml/20200603144949.1122421-1-a.darwish@linutronix.de

[PATCH v2 00/18]
https://lore.kernel.org/lkml/20200608005729.1874024-1-a.darwish@linutronix.de

[PATCH v3 00/20]
https://lore.kernel.org/lkml/20200630054452.3675847-1-a.darwish@linutronix.de

It is based over:

git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git :: locking/core

Changelog
=========

- Unconditionally use C11 _Generic() expressions for seqcount_locktype_t
switching. Thanks to Peter, pushing for 6ec4476ac825 ("Raise gcc
version requirement to 4.9").

- Compress the new seqcount_locktype_t code code by using generative
macros, as suggested by Peter here:

https://lkml.kernel.org/r/20200708122938.GQ4800@hirez.programming.kicks-ass.net

Keep *all* functions that are to be invoked by call-sites out of such
generative macros though. This simplifies the generative macros code,
and (more importantly) make the newly exported seqlock.h API explicit.

- Make all documentation "RST-lite", for better readability from text
editors.

- Add additional clean-ups at the start of the series for better
overall readability of seqlock.h code, and for future extensibility.

Thanks,

8<--------------

Ahmed S. Darwish (24):
Documentation: locking: Describe seqlock design and usage
seqlock: Properly format kernel-doc code samples
seqlock: seqcount_t latch: End read sections with
read_seqcount_retry()
seqlock: Reorder seqcount_t and seqlock_t API definitions
seqlock: Add kernel-doc for seqcount_t and seqlock_t APIs
seqlock: Implement raw_seqcount_begin() in terms of
raw_read_seqcount()
lockdep: Add preemption enabled/disabled assertion APIs
seqlock: lockdep assert non-preemptibility on seqcount_t write
seqlock: Extend seqcount API with associated locks
seqlock: Align multi-line macros newline escapes at 72 columns
dma-buf: Remove custom seqcount lockdep class key
dma-buf: Use sequence counter with associated wound/wait mutex
sched: tasks: Use sequence counter with associated spinlock
netfilter: conntrack: Use sequence counter with associated spinlock
netfilter: nft_set_rbtree: Use sequence counter with associated rwlock
xfrm: policy: Use sequence counters with associated lock
timekeeping: Use sequence counter with associated raw spinlock
vfs: Use sequence counter with associated spinlock
raid5: Use sequence counter with associated spinlock
iocost: Use sequence counter with associated spinlock
NFSv4: Use sequence counter with associated spinlock
userfaultfd: Use sequence counter with associated spinlock
kvm/eventfd: Use sequence counter with associated spinlock
hrtimer: Use sequence counter with associated raw spinlock

Documentation/locking/index.rst | 1 +
Documentation/locking/seqlock.rst | 222 ++++
block/blk-iocost.c | 5 +-
drivers/dma-buf/dma-resv.c | 15 +-
.../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 2 -
drivers/md/raid5.c | 2 +-
drivers/md/raid5.h | 2 +-
fs/dcache.c | 2 +-
fs/fs_struct.c | 4 +-
fs/nfs/nfs4_fs.h | 2 +-
fs/nfs/nfs4state.c | 2 +-
fs/userfaultfd.c | 4 +-
include/linux/dcache.h | 2 +-
include/linux/dma-resv.h | 4 +-
include/linux/fs_struct.h | 2 +-
include/linux/hrtimer.h | 2 +-
include/linux/kvm_irqfd.h | 2 +-
include/linux/lockdep.h | 19 +
include/linux/sched.h | 2 +-
include/linux/seqlock.h | 1139 +++++++++++++----
include/net/netfilter/nf_conntrack.h | 2 +-
init/init_task.c | 3 +-
kernel/fork.c | 2 +-
kernel/time/hrtimer.c | 13 +-
kernel/time/timekeeping.c | 19 +-
lib/Kconfig.debug | 1 +
net/netfilter/nf_conntrack_core.c | 5 +-
net/netfilter/nft_set_rbtree.c | 4 +-
net/xfrm/xfrm_policy.c | 10 +-
virt/kvm/eventfd.c | 2 +-
30 files changed, 1173 insertions(+), 323 deletions(-)
create mode 100644 Documentation/locking/seqlock.rst

base-commit: a9232dc5607dbada801f2fe83ea307cda762969a
--
2.20.1