From 584da076866f38ffb952efcc25af039f9551df81 Mon Sep 17 00:00:00 2001 From: Nikolay Borisov Date: Tue, 10 Nov 2020 15:26:49 +0200 Subject: printk: ringbuffer: Reference text_data_ring directly in callees. A bunch of functions in the new ringbuffer code take both a printk_ringbuffer struct and a separate prb_data_ring. This is a relic from an earlier version of the code when a second data ring was present. Since this is no longer the case remove the extra function argument from: - data_make_reusable() - data_push_tail() - data_alloc() - data_realloc() Signed-off-by: Nikolay Borisov Reviewed-by: John Ogness Reviewed-by: Petr Mladek Signed-off-by: Petr Mladek --- kernel/printk/printk_ringbuffer.c | 32 +++++++++++++++----------------- 1 file changed, 15 insertions(+), 17 deletions(-) (limited to 'kernel/printk') diff --git a/kernel/printk/printk_ringbuffer.c b/kernel/printk/printk_ringbuffer.c index 24a960a89aa8..3b24c3aa55f4 100644 --- a/kernel/printk/printk_ringbuffer.c +++ b/kernel/printk/printk_ringbuffer.c @@ -559,11 +559,12 @@ static void desc_make_reusable(struct prb_desc_ring *desc_ring, * on error the caller can re-load the tail lpos to determine the situation. */ static bool data_make_reusable(struct printk_ringbuffer *rb, - struct prb_data_ring *data_ring, unsigned long lpos_begin, unsigned long lpos_end, unsigned long *lpos_out) { + + struct prb_data_ring *data_ring = &rb->text_data_ring; struct prb_desc_ring *desc_ring = &rb->desc_ring; struct prb_data_block *blk; enum desc_state d_state; @@ -625,10 +626,9 @@ static bool data_make_reusable(struct printk_ringbuffer *rb, * descriptors into the reusable state if the tail is pushed beyond * their associated data block. */ -static bool data_push_tail(struct printk_ringbuffer *rb, - struct prb_data_ring *data_ring, - unsigned long lpos) +static bool data_push_tail(struct printk_ringbuffer *rb, unsigned long lpos) { + struct prb_data_ring *data_ring = &rb->text_data_ring; unsigned long tail_lpos_new; unsigned long tail_lpos; unsigned long next_lpos; @@ -669,8 +669,7 @@ static bool data_push_tail(struct printk_ringbuffer *rb, * Make all descriptors reusable that are associated with * data blocks before @lpos. */ - if (!data_make_reusable(rb, data_ring, tail_lpos, lpos, - &next_lpos)) { + if (!data_make_reusable(rb, tail_lpos, lpos, &next_lpos)) { /* * 1. Guarantee the block ID loaded in * data_make_reusable() is performed before @@ -807,7 +806,7 @@ static bool desc_push_tail(struct printk_ringbuffer *rb, * data blocks once their associated descriptor is gone. */ - if (!data_push_tail(rb, &rb->text_data_ring, desc.text_blk_lpos.next)) + if (!data_push_tail(rb, desc.text_blk_lpos.next)) return false; /* @@ -1021,10 +1020,10 @@ static unsigned long get_next_lpos(struct prb_data_ring *data_ring, * if necessary. This function also associates the data block with * a specified descriptor. */ -static char *data_alloc(struct printk_ringbuffer *rb, - struct prb_data_ring *data_ring, unsigned int size, +static char *data_alloc(struct printk_ringbuffer *rb, unsigned int size, struct prb_data_blk_lpos *blk_lpos, unsigned long id) { + struct prb_data_ring *data_ring = &rb->text_data_ring; struct prb_data_block *blk; unsigned long begin_lpos; unsigned long next_lpos; @@ -1043,7 +1042,7 @@ static char *data_alloc(struct printk_ringbuffer *rb, do { next_lpos = get_next_lpos(data_ring, begin_lpos, size); - if (!data_push_tail(rb, data_ring, next_lpos - DATA_SIZE(data_ring))) { + if (!data_push_tail(rb, next_lpos - DATA_SIZE(data_ring))) { /* Failed to allocate, specify a data-less block. */ blk_lpos->begin = FAILED_LPOS; blk_lpos->next = FAILED_LPOS; @@ -1102,10 +1101,10 @@ static char *data_alloc(struct printk_ringbuffer *rb, * Return a pointer to the beginning of the entire data buffer or NULL on * failure. */ -static char *data_realloc(struct printk_ringbuffer *rb, - struct prb_data_ring *data_ring, unsigned int size, +static char *data_realloc(struct printk_ringbuffer *rb, unsigned int size, struct prb_data_blk_lpos *blk_lpos, unsigned long id) { + struct prb_data_ring *data_ring = &rb->text_data_ring; struct prb_data_block *blk; unsigned long head_lpos; unsigned long next_lpos; @@ -1132,7 +1131,7 @@ static char *data_realloc(struct printk_ringbuffer *rb, return &blk->data[0]; } - if (!data_push_tail(rb, data_ring, next_lpos - DATA_SIZE(data_ring))) + if (!data_push_tail(rb, next_lpos - DATA_SIZE(data_ring))) return NULL; /* The memory barrier involvement is the same as data_alloc:A. */ @@ -1397,7 +1396,7 @@ bool prb_reserve_in_last(struct prb_reserved_entry *e, struct printk_ringbuffer if (r->text_buf_size > max_size) goto fail; - r->text_buf = data_alloc(rb, &rb->text_data_ring, r->text_buf_size, + r->text_buf = data_alloc(rb, r->text_buf_size, &d->text_blk_lpos, id); } else { if (!get_data(&rb->text_data_ring, &d->text_blk_lpos, &data_size)) @@ -1421,7 +1420,7 @@ bool prb_reserve_in_last(struct prb_reserved_entry *e, struct printk_ringbuffer if (r->text_buf_size > max_size) goto fail; - r->text_buf = data_realloc(rb, &rb->text_data_ring, r->text_buf_size, + r->text_buf = data_realloc(rb, r->text_buf_size, &d->text_blk_lpos, id); } if (r->text_buf_size && !r->text_buf) @@ -1549,8 +1548,7 @@ bool prb_reserve(struct prb_reserved_entry *e, struct printk_ringbuffer *rb, if (info->seq > 0) desc_make_final(desc_ring, DESC_ID(id - 1)); - r->text_buf = data_alloc(rb, &rb->text_data_ring, r->text_buf_size, - &d->text_blk_lpos, id); + r->text_buf = data_alloc(rb, r->text_buf_size, &d->text_blk_lpos, id); /* If text data allocation fails, a data-less record is committed. */ if (r->text_buf_size && !r->text_buf) { prb_commit(e); -- cgit v1.2.3