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robust-futexes.txt: standardize document format

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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:

- add a title for the document;
- mark literal blocks;

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 2017-05-17 06:46:19 -03:00 committed by Jonathan Corbet
parent ce3a966931
commit 773810d30e
1 changed files with 8 additions and 4 deletions
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12
Documentation/robust-futexes.txt
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@ -1,4 +1,8 @@
Started by: Ingo Molnar <mingo@redhat.com>
========================================
A description of what robust futexes are
========================================
:Started by: Ingo Molnar <mingo@redhat.com>
Background
----------
@ -163,7 +167,7 @@ Implementation details
----------------------
The patch adds two new syscalls: one to register the userspace list, and
one to query the registered list pointer:
one to query the registered list pointer::
asmlinkage long
sys_set_robust_list(struct robust_list_head __user *head,
@ -185,7 +189,7 @@ straightforward. The kernel doesn't have any internal distinction between
robust and normal futexes.
If a futex is found to be held at exit time, the kernel sets the
following bit of the futex word:
following bit of the futex word::
#define FUTEX_OWNER_DIED 0x40000000
@ -193,7 +197,7 @@ and wakes up the next futex waiter (if any). User-space does the rest of
the cleanup.
Otherwise, robust futexes are acquired by glibc by putting the TID into
the futex field atomically. Waiters set the FUTEX_WAITERS bit:
the futex field atomically. Waiters set the FUTEX_WAITERS bit::
#define FUTEX_WAITERS 0x80000000