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Filename Latest commit message Latest commit date
Waiman Long 94a9717b3c locking/rwsem: Make rwsem->owner an atomic_long_t
The rwsem->owner contains not just the task structure pointer, it also
holds some flags for storing the current state of the rwsem. Some of
the flags may have to be atomically updated. To reflect the new reality,
the owner is now changed to an atomic_long_t type.

New helper functions are added to properly separate out the task
structure pointer and the embedded flags.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: huang ying <huang.ying.caritas@gmail.com>
Link: https://lkml.kernel.org/r/20190520205918.22251-14-longman@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2019-06-17 12:28:06 +02:00
arch x86/atomic: Fix smp_mb__{before,after}_atomic() 2019-06-17 12:09:59 +02:00
block
certs
crypto
Documentation x86/atomic: Fix smp_mb__{before,after}_atomic() 2019-06-17 12:09:59 +02:00
drivers locking/lockdep: Rename lockdep_assert_held_exclusive() -> lockdep_assert_held_write() 2019-06-17 12:09:24 +02:00
fs locking/lockdep: Rename lockdep_assert_held_exclusive() -> lockdep_assert_held_write() 2019-06-17 12:09:24 +02:00
include locking/rwsem: Make rwsem->owner an atomic_long_t 2019-06-17 12:28:06 +02:00
init
ipc
kernel locking/rwsem: Make rwsem->owner an atomic_long_t 2019-06-17 12:28:06 +02:00
lib locking/rwsem: Make owner available even if !CONFIG_RWSEM_SPIN_ON_OWNER 2019-06-17 12:27:54 +02:00
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security locking/lockdep: Rename lockdep_assert_held_exclusive() -> lockdep_assert_held_write() 2019-06-17 12:09:24 +02:00
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README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.