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Diffstat (limited to 'Documentation/kernel-hacking')
| -rw-r--r-- | Documentation/kernel-hacking/locking.rst | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/Documentation/kernel-hacking/locking.rst b/Documentation/kernel-hacking/locking.rst index b70c2c4eb147..f937c0fd11aa 100644 --- a/Documentation/kernel-hacking/locking.rst +++ b/Documentation/kernel-hacking/locking.rst @@ -93,13 +93,13 @@ Locking in the Linux Kernel =========================== If I could give you one piece of advice: never sleep with anyone crazier -than yourself. But if I had to give you advice on locking: *keep it -simple*. +than yourself. But if I had to give you advice on locking: **keep it +simple**. Be reluctant to introduce new locks. Strangely enough, this last one is the exact reverse of my advice when -you *have* slept with someone crazier than yourself. And you should +you **have** slept with someone crazier than yourself. And you should think about getting a big dog. Two Main Types of Kernel Locks: Spinlocks and Mutexes @@ -311,7 +311,7 @@ Pete Zaitcev gives the following summary: Table of Minimum Requirements ----------------------------- -The following table lists the *minimum* locking requirements between +The following table lists the **minimum** locking requirements between various contexts. In some cases, the same context can only be running on one CPU at a time, so no locking is required for that context (eg. a particular thread can only run on one CPU at a time, but if it needs @@ -703,7 +703,7 @@ reference count, but they are more complicated. Using Atomic Operations For The Reference Count ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -In practice, ``atomic_t`` would usually be used for refcnt. There are a +In practice, :c:type:`atomic_t` would usually be used for refcnt. There are a number of atomic operations defined in ``include/asm/atomic.h``: these are guaranteed to be seen atomically from all CPUs in the system, so no lock is required. In this case, it is simpler than using spinlocks, @@ -1321,7 +1321,7 @@ from user context, and can sleep. - :c:func:`put_user()` -- ``kmalloc(GFP_KERNEL)`` +- :c:func:`kmalloc(GFP_KERNEL) <kmalloc>` - :c:func:`mutex_lock_interruptible()` and :c:func:`mutex_lock()` @@ -1431,10 +1431,10 @@ tasklet timer A dynamically-registrable software interrupt, which is run at (or close to) a given time. When running, it is just like a tasklet (in fact, they - are called from the TIMER_SOFTIRQ). + are called from the ``TIMER_SOFTIRQ``). UP - Uni-Processor: Non-SMP. (CONFIG_SMP=n). + Uni-Processor: Non-SMP. (``CONFIG_SMP=n``). User Context The kernel executing on behalf of a particular process (ie. a system |