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Subject[PATCH] tools: lib: traceevent: kbuffer-parse.c: Remove some unused functions
Date
Removes some functions that are not used anywhere:
kbuffer_set_old_format() kbuffer_missed_events() kbuffer_curr_size()
kbuffer_event_size() kbuffer_curr_offset() kbuffer_curr_index()
kbuffer_subbuffer_size() kbuffer_read_at_offset() kbuffer_timestamp()
kbuffer_read_event() kbuffer_translate_data() kbuffer_free() kbuffer_alloc()

This was partially found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
---
tools/lib/traceevent/kbuffer-parse.c | 282 ----------------------------------
tools/lib/traceevent/kbuffer.h | 18 ---
2 files changed, 300 deletions(-)

diff --git a/tools/lib/traceevent/kbuffer-parse.c b/tools/lib/traceevent/kbuffer-parse.c
index dcc6652..3dc825a 100644
--- a/tools/lib/traceevent/kbuffer-parse.c
+++ b/tools/lib/traceevent/kbuffer-parse.c
@@ -169,77 +169,6 @@ static int calc_index(struct kbuffer *kbuf, void *ptr)

static int __next_event(struct kbuffer *kbuf);

-/**
- * kbuffer_alloc - allocat a new kbuffer
- * @size; enum to denote size of word
- * @endian: enum to denote endianness
- *
- * Allocates and returns a new kbuffer.
- */
-struct kbuffer *
-kbuffer_alloc(enum kbuffer_long_size size, enum kbuffer_endian endian)
-{
- struct kbuffer *kbuf;
- int flags = 0;
-
- switch (size) {
- case KBUFFER_LSIZE_4:
- break;
- case KBUFFER_LSIZE_8:
- flags |= KBUFFER_FL_LONG_8;
- break;
- default:
- return NULL;
- }
-
- switch (endian) {
- case KBUFFER_ENDIAN_LITTLE:
- break;
- case KBUFFER_ENDIAN_BIG:
- flags |= KBUFFER_FL_BIG_ENDIAN;
- break;
- default:
- return NULL;
- }
-
- kbuf = zmalloc(sizeof(*kbuf));
- if (!kbuf)
- return NULL;
-
- kbuf->flags = flags;
-
- if (host_is_bigendian())
- kbuf->flags |= KBUFFER_FL_HOST_BIG_ENDIAN;
-
- if (do_swap(kbuf)) {
- kbuf->read_8 = __read_8_sw;
- kbuf->read_4 = __read_4_sw;
- } else {
- kbuf->read_8 = __read_8;
- kbuf->read_4 = __read_4;
- }
-
- if (kbuf->flags & KBUFFER_FL_LONG_8)
- kbuf->read_long = __read_long_8;
- else
- kbuf->read_long = __read_long_4;
-
- /* May be changed by kbuffer_set_old_format() */
- kbuf->next_event = __next_event;
-
- return kbuf;
-}
-
-/** kbuffer_free - free an allocated kbuffer
- * @kbuf: The kbuffer to free
- *
- * Can take NULL as a parameter.
- */
-void kbuffer_free(struct kbuffer *kbuf)
-{
- free(kbuf);
-}
-
static unsigned int type4host(struct kbuffer *kbuf,
unsigned int type_len_ts)
{
@@ -419,47 +348,6 @@ static unsigned int update_pointers(struct kbuffer *kbuf)
return type_len;
}

-/**
- * kbuffer_translate_data - read raw data to get a record
- * @swap: Set to 1 if bytes in words need to be swapped when read
- * @data: The raw data to read
- * @size: Address to store the size of the event data.
- *
- * Returns a pointer to the event data. To determine the entire
- * record size (record metadata + data) just add the difference between
- * @data and the returned value to @size.
- */
-void *kbuffer_translate_data(int swap, void *data, unsigned int *size)
-{
- unsigned long long delta;
- struct kbuffer kbuf;
- int type_len;
- int length;
- void *ptr;
-
- if (swap) {
- kbuf.read_8 = __read_8_sw;
- kbuf.read_4 = __read_4_sw;
- kbuf.flags = host_is_bigendian() ? 0 : KBUFFER_FL_BIG_ENDIAN;
- } else {
- kbuf.read_8 = __read_8;
- kbuf.read_4 = __read_4;
- kbuf.flags = host_is_bigendian() ? KBUFFER_FL_BIG_ENDIAN: 0;
- }
-
- type_len = translate_data(&kbuf, data, &ptr, &delta, &length);
- switch (type_len) {
- case KBUFFER_TYPE_PADDING:
- case KBUFFER_TYPE_TIME_EXTEND:
- case KBUFFER_TYPE_TIME_STAMP:
- return NULL;
- };
-
- *size = length;
-
- return ptr;
-}
-
static int __next_event(struct kbuffer *kbuf)
{
int type;
@@ -560,173 +448,3 @@ int kbuffer_load_subbuffer(struct kbuffer *kbuf, void *subbuffer)

return 0;
}
-
-/**
- * kbuffer_read_event - read the next event in the kbuffer subbuffer
- * @kbuf: The kbuffer to read from
- * @ts: The address to store the timestamp of the event (may be NULL to ignore)
- *
- * Returns a pointer to the data part of the current event.
- * NULL if no event is left on the subbuffer.
- */
-void *kbuffer_read_event(struct kbuffer *kbuf, unsigned long long *ts)
-{
- if (!kbuf || !kbuf->subbuffer)
- return NULL;
-
- if (kbuf->curr >= kbuf->size)
- return NULL;
-
- if (ts)
- *ts = kbuf->timestamp;
- return kbuf->data + kbuf->index;
-}
-
-/**
- * kbuffer_timestamp - Return the timestamp of the current event
- * @kbuf: The kbuffer to read from
- *
- * Returns the timestamp of the current (next) event.
- */
-unsigned long long kbuffer_timestamp(struct kbuffer *kbuf)
-{
- return kbuf->timestamp;
-}
-
-/**
- * kbuffer_read_at_offset - read the event that is at offset
- * @kbuf: The kbuffer to read from
- * @offset: The offset into the subbuffer
- * @ts: The address to store the timestamp of the event (may be NULL to ignore)
- *
- * The @offset must be an index from the @kbuf subbuffer beginning.
- * If @offset is bigger than the stored subbuffer, NULL will be returned.
- *
- * Returns the data of the record that is at @offset. Note, @offset does
- * not need to be the start of the record, the offset just needs to be
- * in the record (or beginning of it).
- *
- * Note, the kbuf timestamp and pointers are updated to the
- * returned record. That is, kbuffer_read_event() will return the same
- * data and timestamp, and kbuffer_next_event() will increment from
- * this record.
- */
-void *kbuffer_read_at_offset(struct kbuffer *kbuf, int offset,
- unsigned long long *ts)
-{
- void *data;
-
- if (offset < kbuf->start)
- offset = 0;
- else
- offset -= kbuf->start;
-
- /* Reset the buffer */
- kbuffer_load_subbuffer(kbuf, kbuf->subbuffer);
-
- while (kbuf->curr < offset) {
- data = kbuffer_next_event(kbuf, ts);
- if (!data)
- break;
- }
-
- return data;
-}
-
-/**
- * kbuffer_subbuffer_size - the size of the loaded subbuffer
- * @kbuf: The kbuffer to read from
- *
- * Returns the size of the subbuffer. Note, this size is
- * where the last event resides. The stored subbuffer may actually be
- * bigger due to padding and such.
- */
-int kbuffer_subbuffer_size(struct kbuffer *kbuf)
-{
- return kbuf->size;
-}
-
-/**
- * kbuffer_curr_index - Return the index of the record
- * @kbuf: The kbuffer to read from
- *
- * Returns the index from the start of the data part of
- * the subbuffer to the current location. Note this is not
- * from the start of the subbuffer. An index of zero will
- * point to the first record. Use kbuffer_curr_offset() for
- * the actually offset (that can be used by kbuffer_read_at_offset())
- */
-int kbuffer_curr_index(struct kbuffer *kbuf)
-{
- return kbuf->curr;
-}
-
-/**
- * kbuffer_curr_offset - Return the offset of the record
- * @kbuf: The kbuffer to read from
- *
- * Returns the offset from the start of the subbuffer to the
- * current location.
- */
-int kbuffer_curr_offset(struct kbuffer *kbuf)
-{
- return kbuf->curr + kbuf->start;
-}
-
-/**
- * kbuffer_event_size - return the size of the event data
- * @kbuf: The kbuffer to read
- *
- * Returns the size of the event data (the payload not counting
- * the meta data of the record) of the current event.
- */
-int kbuffer_event_size(struct kbuffer *kbuf)
-{
- return kbuf->next - kbuf->index;
-}
-
-/**
- * kbuffer_curr_size - return the size of the entire record
- * @kbuf: The kbuffer to read
- *
- * Returns the size of the entire record (meta data and payload)
- * of the current event.
- */
-int kbuffer_curr_size(struct kbuffer *kbuf)
-{
- return kbuf->next - kbuf->curr;
-}
-
-/**
- * kbuffer_missed_events - return the # of missed events from last event.
- * @kbuf: The kbuffer to read from
- *
- * Returns the # of missed events (if recorded) before the current
- * event. Note, only events on the beginning of a subbuffer can
- * have missed events, all other events within the buffer will be
- * zero.
- */
-int kbuffer_missed_events(struct kbuffer *kbuf)
-{
- /* Only the first event can have missed events */
- if (kbuf->curr)
- return 0;
-
- return kbuf->lost_events;
-}
-
-/**
- * kbuffer_set_old_forma - set the kbuffer to use the old format parsing
- * @kbuf: The kbuffer to set
- *
- * This is obsolete (or should be). The first kernels to use the
- * new ring buffer had a slightly different ring buffer format
- * (2.6.30 and earlier). It is still somewhat supported by kbuffer,
- * but should not be counted on in the future.
- */
-void kbuffer_set_old_format(struct kbuffer *kbuf)
-{
- kbuf->flags |= KBUFFER_FL_OLD_FORMAT;
-
- kbuf->next_event = __old_next_event;
-}
diff --git a/tools/lib/traceevent/kbuffer.h b/tools/lib/traceevent/kbuffer.h
index c831f64..ac8a869 100644
--- a/tools/lib/traceevent/kbuffer.h
+++ b/tools/lib/traceevent/kbuffer.h
@@ -43,25 +43,7 @@ enum {

struct kbuffer;

-struct kbuffer *kbuffer_alloc(enum kbuffer_long_size size, enum kbuffer_endian endian);
-void kbuffer_free(struct kbuffer *kbuf);
int kbuffer_load_subbuffer(struct kbuffer *kbuf, void *subbuffer);
-void *kbuffer_read_event(struct kbuffer *kbuf, unsigned long long *ts);
void *kbuffer_next_event(struct kbuffer *kbuf, unsigned long long *ts);
-unsigned long long kbuffer_timestamp(struct kbuffer *kbuf);
-
-void *kbuffer_translate_data(int swap, void *data, unsigned int *size);
-
-void *kbuffer_read_at_offset(struct kbuffer *kbuf, int offset, unsigned long long *ts);
-
-int kbuffer_curr_index(struct kbuffer *kbuf);
-
-int kbuffer_curr_offset(struct kbuffer *kbuf);
-int kbuffer_curr_size(struct kbuffer *kbuf);
-int kbuffer_event_size(struct kbuffer *kbuf);
-int kbuffer_missed_events(struct kbuffer *kbuf);
-int kbuffer_subbuffer_size(struct kbuffer *kbuf);
-
-void kbuffer_set_old_format(struct kbuffer *kbuf);

#endif /* _K_BUFFER_H */
--
1.7.10.4


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