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| Filename | Latest commit message | Latest commit date |
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116f21bb96
As noted in Documentation/atomic_t.txt, if we don't need the RMW atomic operations, we should only use READ_ONCE()/WRITE_ONCE() + smp_rmb()/smp_wmb() where necessary (or the combined variants smp_load_acquire()/smp_store_release()). This patch converts the sidtab code to use regular u32 for the counter and reverse lookup cache and use the appropriate operations instead of atomic_get()/atomic_set(). Note that when reading/updating the reverse lookup cache we don't need memory barriers as it doesn't need to be consistent or accurate. We can now also replace some atomic ops with regular loads (when under spinlock) and stores (for conversion target fields that are always accessed under the master table's spinlock). We can now also bump SIDTAB_MAX to U32_MAX as we can use the full u32 range again. Suggested-by: Jann Horn <jannh@google.com> Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Reviewed-by: Jann Horn <jannh@google.com> Signed-off-by: Paul Moore <paul@paul-moore.com> |
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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.