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blktrace: add blk_fill_rwbs documentation comment

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blk_fill_rwbs() is an expoted function, add kernel style documentation
comment.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Chaitanya Kulkarni 2021-02-21 21:29:56 -08:00 • committed by Jens Axboe
parent 179d160072
commit 1f83bb4b49
2 changed files with 11 additions and 1 deletions
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2
include/linux/blktrace_api.h
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@ -119,7 +119,7 @@ struct compat_blk_user_trace_setup {
#endif #endif
extern void blk_fill_rwbs(char *rwbs, unsigned int op); void blk_fill_rwbs(char *rwbs, unsigned int op);
static inline sector_t blk_rq_trace_sector(struct request *rq) static inline sector_t blk_rq_trace_sector(struct request *rq)
{ {

10
kernel/trace/blktrace.c
View file

@ -1867,6 +1867,16 @@ void blk_trace_remove_sysfs(struct device *dev)
#ifdef CONFIG_EVENT_TRACING #ifdef CONFIG_EVENT_TRACING
/**
* blk_fill_rwbs - Fill the buffer rwbs by mapping op to character string.
* @rwbs buffer to be filled
* @op: REQ_OP_XXX for the tracepoint
*
* Description:
* Maps the REQ_OP_XXX to character and fills the buffer provided by the
* caller with resulting string.
*
**/
void blk_fill_rwbs(char *rwbs, unsigned int op) void blk_fill_rwbs(char *rwbs, unsigned int op)
{ {
int i = 0; int i = 0;