fdbb9b315c
The rcu_cpu_starting() function uses this_cpu_ptr() to locate the incoming CPU's rcu_data structure. This works for the boot CPU and for all CPUs onlined after rcu_init() executes (during very early boot). Currently, this is the full set of CPUs, so all is well. But if anyone ever parallelizes boot before rcu_init() time, it will fail. This commit therefore substitutes the rcu_cpu_starting() function's this_cpu_pointer() for per_cpu_ptr(), future-proofing the code and (arguably) improving readability. This commit inadvertently fixes a latent bug: If there ever had been more than just the boot CPU online at rcu_init() time, the old code would not initialize the non-boot CPUs, but rather would repeatedly initialize the boot CPU. Reported-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> |
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| Documentation | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.