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irqflags-tracing.txt: standardize document format 

Each text file under Documentation follows a different
format. Some doesn't even have titles!

Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:

There isn't much to be done here: just mark the document
title as such and add a :Author:.

While here, use upper case at the beginning of a few paragraphs
that start with lower case.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Mauro Carvalho Chehab 2017-05-14 15:35:40 -03:00 committed by Jonathan Corbet
parent 1642a1e68a
commit b4282c7920
1 changed files with 6 additions and 4 deletions
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10
Documentation/irqflags-tracing.txt
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@ -1,8 +1,10 @@
=======================
IRQ-flags state tracing
=======================
started by Ingo Molnar <mingo@redhat.com>
:Author: started by Ingo Molnar <mingo@redhat.com>
the "irq-flags tracing" feature "traces" hardirq and softirq state, in
The "irq-flags tracing" feature "traces" hardirq and softirq state, in
that it gives interested subsystems an opportunity to be notified of
every hardirqs-off/hardirqs-on, softirqs-off/softirqs-on event that
happens in the kernel.
@ -14,7 +16,7 @@ CONFIG_PROVE_RWSEM_LOCKING will be offered on an architecture - these
are locking APIs that are not used in IRQ context. (the one exception
for rwsems is worked around)
architecture support for this is certainly not in the "trivial"
Architecture support for this is certainly not in the "trivial"
category, because lots of lowlevel assembly code deal with irq-flags
state changes. But an architecture can be irq-flags-tracing enabled in a
rather straightforward and risk-free manner.
@ -41,7 +43,7 @@ irq-flags-tracing support:
excluded from the irq-tracing [and lock validation] mechanism via
lockdep_off()/lockdep_on().
in general there is no risk from having an incomplete irq-flags-tracing
In general there is no risk from having an incomplete irq-flags-tracing
implementation in an architecture: lockdep will detect that and will
turn itself off. I.e. the lock validator will still be reliable. There
should be no crashes due to irq-tracing bugs. (except if the assembly