linux/init
Ahmed S. Darwish b75058614f sched: tasks: Use sequence counter with associated spinlock
A sequence counter write side critical section must be protected by some
form of locking to serialize writers. A plain seqcount_t does not
contain the information of which lock must be held when entering a write
side critical section.

Use the new seqcount_spinlock_t data type, which allows to associate a
spinlock with the sequence counter. This enables lockdep to verify that
the spinlock used for writer serialization is held when the write side
critical section is entered.

If lockdep is disabled this lock association is compiled out and has
neither storage size nor runtime overhead.

Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200720155530.1173732-14-a.darwish@linutronix.de
2020-07-29 16:14:26 +02:00
..
calibrate.c
do_mounts_initrd.c x86/setup: Add an initrdmem= option to specify initrd physical address 2020-04-27 09:28:16 +02:00
do_mounts_md.c init/: remove ineffective sparse disabling 2018-08-22 10:52:49 -07:00
do_mounts_rd.c init/: remove ineffective sparse disabling 2018-08-22 10:52:49 -07:00
do_mounts.c block: remove __bdevname 2020-03-24 07:57:07 -06:00
do_mounts.h fs: add do_mknodat() helper and ksys_mknod() wrapper; remove in-kernel calls to syscall 2018-04-02 20:15:56 +02:00
init_task.c sched: tasks: Use sequence counter with associated spinlock 2020-07-29 16:14:26 +02:00
initramfs.c gcc-10: mark more functions __init to avoid section mismatch warnings 2020-05-09 17:50:03 -07:00
Kconfig kbuild: fix CONFIG_CC_CAN_LINK(_STATIC) for cross-compilation with Clang 2020-07-02 00:57:45 +09:00
main.c Rebase locking/kcsan to locking/urgent 2020-06-11 20:02:46 +02:00
Makefile kbuild: use CONFIG_CC_VERSION_TEXT to construct LINUX_COMPILER macro 2020-05-12 13:28:33 +09:00
noinitramfs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 167 2019-05-30 11:26:39 -07:00
version.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00