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[PATCH] typo fixes for rt-mutex-design.txt

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Address some simple typos in rt-mutex-design.txt It also changes the
indentation of the cmpxchg example (the cmpxchg example was indented by
spaces, while all other code snippets were indented by tabs).

Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Jan Altenberg <tb10alj@tglx.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jan Altenberg 2006-09-30 23:28:08 -07:00 committed by Linus Torvalds
parent 710b8b5f43
commit 9ba0bdfd04
1 changed files with 7 additions and 7 deletions
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14
Documentation/rt-mutex-design.txt
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@ -333,11 +333,11 @@ cmpxchg is basically the following function performed atomically:
unsigned long _cmpxchg(unsigned long *A, unsigned long *B, unsigned long *C) unsigned long _cmpxchg(unsigned long *A, unsigned long *B, unsigned long *C)
{ {
unsigned long T = *A; unsigned long T = *A;
if (*A == *B) { if (*A == *B) {
*A = *C; *A = *C;
} }
return T; return T;
} }
#define cmpxchg(a,b,c) _cmpxchg(&a,&b,&c) #define cmpxchg(a,b,c) _cmpxchg(&a,&b,&c)
@ -582,7 +582,7 @@ contention).
try_to_take_rt_mutex is used every time the task tries to grab a mutex in the try_to_take_rt_mutex is used every time the task tries to grab a mutex in the
slow path. The first thing that is done here is an atomic setting of slow path. The first thing that is done here is an atomic setting of
the "Has Waiters" flag of the mutex's owner field. Yes, this could really the "Has Waiters" flag of the mutex's owner field. Yes, this could really
be false, because if the the mutex has no owner, there are no waiters and be false, because if the mutex has no owner, there are no waiters and
the current task also won't have any waiters. But we don't have the lock the current task also won't have any waiters. But we don't have the lock
yet, so we assume we are going to be a waiter. The reason for this is to yet, so we assume we are going to be a waiter. The reason for this is to
play nice for those architectures that do have CMPXCHG. By setting this flag play nice for those architectures that do have CMPXCHG. By setting this flag
@ -735,7 +735,7 @@ do have CMPXCHG, that check is done in the fast path, but it is still needed
in the slow path too. If a waiter of a mutex woke up because of a signal in the slow path too. If a waiter of a mutex woke up because of a signal
or timeout between the time the owner failed the fast path CMPXCHG check and or timeout between the time the owner failed the fast path CMPXCHG check and
the grabbing of the wait_lock, the mutex may not have any waiters, thus the the grabbing of the wait_lock, the mutex may not have any waiters, thus the
owner still needs to make this check. If there are no waiters than the mutex owner still needs to make this check. If there are no waiters then the mutex
owner field is set to NULL, the wait_lock is released and nothing more is owner field is set to NULL, the wait_lock is released and nothing more is
needed. needed.