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seqlock: Properly format kernel-doc code samples

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Align the code samples and note sections inside kernel-doc comments with
tabs. This way they can be properly parsed and rendered by Sphinx. It
also makes the code samples easier to read from text editors.

Signed-off-by: Ahmed S. Darwish <a.darwish@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200720155530.1173732-3-a.darwish@linutronix.de
This commit is contained in:
Ahmed S. Darwish 2020-07-20 17:55:08 +02:00 • committed by Peter Zijlstra
parent 0d24f65e93
commit 15cbe67bbd
1 changed files with 56 additions and 52 deletions
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24
include/linux/seqlock.h
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@ -263,7 +263,7 @@ static inline void raw_write_seqcount_end(seqcount_t *s)
* atomically, avoiding compiler optimizations; b) to document which writes are * atomically, avoiding compiler optimizations; b) to document which writes are
* meant to propagate to the reader critical section. This is necessary because * meant to propagate to the reader critical section. This is necessary because
* neither writes before and after the barrier are enclosed in a seq-writer * neither writes before and after the barrier are enclosed in a seq-writer
* critical section that would ensure readers are aware of ongoing writes. * critical section that would ensure readers are aware of ongoing writes::
* *
* seqcount_t seq; * seqcount_t seq;
* bool X = true, Y = false; * bool X = true, Y = false;
@ -325,7 +325,7 @@ static inline int raw_read_seqcount_latch(seqcount_t *s)
* Very simply put: we first modify one copy and then the other. This ensures * Very simply put: we first modify one copy and then the other. This ensures
* there is always one copy in a stable state, ready to give us an answer. * there is always one copy in a stable state, ready to give us an answer.
* *
* The basic form is a data structure like: * The basic form is a data structure like::
* *
* struct latch_struct { * struct latch_struct {
* seqcount_t seq; * seqcount_t seq;
@ -333,24 +333,24 @@ static inline int raw_read_seqcount_latch(seqcount_t *s)
* }; * };
* *
* Where a modification, which is assumed to be externally serialized, does the * Where a modification, which is assumed to be externally serialized, does the
* following: * following::
* *
* void latch_modify(struct latch_struct *latch, ...) * void latch_modify(struct latch_struct *latch, ...)
* { * {
* smp_wmb(); <- Ensure that the last data[1] update is visible * smp_wmb(); // Ensure that the last data[1] update is visible
* latch->seq++; * latch->seq++;
* smp_wmb(); <- Ensure that the seqcount update is visible * smp_wmb(); // Ensure that the seqcount update is visible
* *
* modify(latch->data[0], ...); * modify(latch->data[0], ...);
* *
* smp_wmb(); <- Ensure that the data[0] update is visible * smp_wmb(); // Ensure that the data[0] update is visible
* latch->seq++; * latch->seq++;
* smp_wmb(); <- Ensure that the seqcount update is visible * smp_wmb(); // Ensure that the seqcount update is visible
* *
* modify(latch->data[1], ...); * modify(latch->data[1], ...);
* } * }
* *
* The query will have a form like: * The query will have a form like::
* *
* struct entry *latch_query(struct latch_struct *latch, ...) * struct entry *latch_query(struct latch_struct *latch, ...)
* { * {
@ -373,7 +373,9 @@ static inline int raw_read_seqcount_latch(seqcount_t *s)
* modify data[0]. When that is complete, we redirect queries back to data[0] * modify data[0]. When that is complete, we redirect queries back to data[0]
* and we can modify data[1]. * and we can modify data[1].
* *
* NOTE: The non-requirement for atomic modifications does _NOT_ include * NOTE:
*
* The non-requirement for atomic modifications does _NOT_ include
* the publishing of new entries in the case where data is a dynamic * the publishing of new entries in the case where data is a dynamic
* data structure. * data structure.
* *
@ -381,7 +383,9 @@ static inline int raw_read_seqcount_latch(seqcount_t *s)
* to miss an entire modification sequence, once it resumes it might * to miss an entire modification sequence, once it resumes it might
* observe the new entry. * observe the new entry.
* *
* NOTE: When data is a dynamic data structure; one should use regular RCU * NOTE:
*
* When data is a dynamic data structure; one should use regular RCU
* patterns to manage the lifetimes of the objects within. * patterns to manage the lifetimes of the objects within.
*/ */
static inline void raw_write_seqcount_latch(seqcount_t *s) static inline void raw_write_seqcount_latch(seqcount_t *s)