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Subject[PATCH 03/18] lightnvm: pblk: normalize ppa namings
Date
Normalize the way we name ppa variables to improve code readability.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
---
drivers/lightnvm/pblk-core.c | 48 +++++++++++++++++++++++---------------------
1 file changed, 25 insertions(+), 23 deletions(-)

diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index 81501644fb15..e3997abdf740 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -1764,7 +1764,7 @@ void pblk_up_rq(struct pblk *pblk, struct ppa_addr *ppa_list, int nr_ppas,

void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
{
- struct ppa_addr l2p_ppa;
+ struct ppa_addr ppa_l2p;

/* logic error: lba out-of-bounds. Ignore update */
if (!(lba < pblk->rl.nr_secs)) {
@@ -1773,10 +1773,10 @@ void pblk_update_map(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
}

spin_lock(&pblk->trans_lock);
- l2p_ppa = pblk_trans_map_get(pblk, lba);
+ ppa_l2p = pblk_trans_map_get(pblk, lba);

- if (!pblk_addr_in_cache(l2p_ppa) && !pblk_ppa_empty(l2p_ppa))
- pblk_map_invalidate(pblk, l2p_ppa);
+ if (!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p))
+ pblk_map_invalidate(pblk, ppa_l2p);

pblk_trans_map_set(pblk, lba, ppa);
spin_unlock(&pblk->trans_lock);
@@ -1793,16 +1793,16 @@ void pblk_update_map_cache(struct pblk *pblk, sector_t lba, struct ppa_addr ppa)
pblk_update_map(pblk, lba, ppa);
}

-int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
+int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa_new,
struct pblk_line *gc_line)
{
- struct ppa_addr l2p_ppa;
+ struct ppa_addr ppa_l2p;
int ret = 1;

#ifdef CONFIG_NVM_DEBUG
/* Callers must ensure that the ppa points to a cache address */
- BUG_ON(!pblk_addr_in_cache(ppa));
- BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa)));
+ BUG_ON(!pblk_addr_in_cache(ppa_new));
+ BUG_ON(pblk_rb_pos_oob(&pblk->rwb, pblk_addr_to_cacheline(ppa_new)));
#endif

/* logic error: lba out-of-bounds. Ignore update */
@@ -1812,36 +1812,38 @@ int pblk_update_map_gc(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
}

spin_lock(&pblk->trans_lock);
- l2p_ppa = pblk_trans_map_get(pblk, lba);
+ ppa_l2p = pblk_trans_map_get(pblk, lba);

/* Prevent updated entries to be overwritten by GC */
- if (pblk_addr_in_cache(l2p_ppa) || pblk_ppa_empty(l2p_ppa) ||
- pblk_tgt_ppa_to_line(l2p_ppa) != gc_line->id) {
+ if (pblk_addr_in_cache(ppa_l2p) || pblk_ppa_empty(ppa_l2p) ||
+ pblk_tgt_ppa_to_line(ppa_l2p) != gc_line->id) {
+
ret = 0;
goto out;
}

- pblk_trans_map_set(pblk, lba, ppa);
+ pblk_trans_map_set(pblk, lba, ppa_new);
out:
spin_unlock(&pblk->trans_lock);
return ret;
}

-void pblk_update_map_dev(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
- struct ppa_addr entry_line)
+void pblk_update_map_dev(struct pblk *pblk, sector_t lba,
+ struct ppa_addr ppa_mapped, struct ppa_addr ppa_cache)
{
- struct ppa_addr l2p_line;
+ struct ppa_addr ppa_l2p;

#ifdef CONFIG_NVM_DEBUG
/* Callers must ensure that the ppa points to a device address */
- BUG_ON(pblk_addr_in_cache(ppa));
+ BUG_ON(pblk_addr_in_cache(ppa_mapped));
#endif
/* Invalidate and discard padded entries */
if (lba == ADDR_EMPTY) {
#ifdef CONFIG_NVM_DEBUG
atomic_long_inc(&pblk->padded_wb);
#endif
- pblk_map_invalidate(pblk, ppa);
+ if (!pblk_ppa_empty(ppa_mapped))
+ pblk_map_invalidate(pblk, ppa_mapped);
return;
}

@@ -1852,22 +1854,22 @@ void pblk_update_map_dev(struct pblk *pblk, sector_t lba, struct ppa_addr ppa,
}

spin_lock(&pblk->trans_lock);
- l2p_line = pblk_trans_map_get(pblk, lba);
+ ppa_l2p = pblk_trans_map_get(pblk, lba);

/* Do not update L2P if the cacheline has been updated. In this case,
* the mapped ppa must be invalidated
*/
- if (l2p_line.ppa != entry_line.ppa) {
- if (!pblk_ppa_empty(ppa))
- pblk_map_invalidate(pblk, ppa);
+ if (!pblk_ppa_comp(ppa_l2p, ppa_cache)) {
+ if (!pblk_ppa_empty(ppa_mapped))
+ pblk_map_invalidate(pblk, ppa_mapped);
goto out;
}

#ifdef CONFIG_NVM_DEBUG
- WARN_ON(!pblk_addr_in_cache(l2p_line) && !pblk_ppa_empty(l2p_line));
+ WARN_ON(!pblk_addr_in_cache(ppa_l2p) && !pblk_ppa_empty(ppa_l2p));
#endif

- pblk_trans_map_set(pblk, lba, ppa);
+ pblk_trans_map_set(pblk, lba, ppa_mapped);
out:
spin_unlock(&pblk->trans_lock);
}
--
2.7.4
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