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07b4a930fc
Now that RCU flavors have been consolidated, an RCU-preempt rcu_read_unlock() in an interrupt or softirq handler cannot possibly end the RCU read-side critical section. Consider the old vulnerability involving rcu_preempt_deferred_qs() being invoked within such a handler that interrupted an extended RCU read-side critical section, in which a wakeup might be invoked with a scheduler lock held. Because rcu_read_unlock_special() no longer does wakeups in such situations, it is no longer necessary for rcu_preempt_deferred_qs() to set the nesting level negative. This commit therefore removes this recursion-protection code from rcu_preempt_deferred_qs(). [ paulmck: Fix typo in commit log per Steve Rostedt. ] Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org> |
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arch | ||
block | ||
certs | ||
crypto | ||
Documentation | ||
drivers | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
LICENSES | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.clang-format | ||
.cocciconfig | ||
.get_maintainer.ignore | ||
.gitattributes | ||
.gitignore | ||
.mailmap | ||
COPYING | ||
CREDITS | ||
Kbuild | ||
Kconfig | ||
MAINTAINERS | ||
Makefile | ||
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.