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Date: Tue, 11 Oct 2022 14:56:34 -0700
From: "Vishal Moola (Oracle)" <vishal.moola@...il.com>
To: akpm@...ux-foundation.org
Cc: willy@...radead.org, hughd@...gle.com,
linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
linux-kernel@...r.kernel.org,
"Vishal Moola (Oracle)" <vishal.moola@...il.com>
Subject: [PATCH 4/4] filemap: Remove indices argument from find_lock_entries() and find_get_entries()
The indices array is unnecessary. Folios keep track of their xarray indices
in the folio->index field which can simply be accessed as needed.
This change removes the indices argument from find_lock_entries() and
find_get_entries(). All of the callers are able to remove their indices
arrays as well.
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@...il.com>
---
mm/filemap.c | 8 ++------
mm/internal.h | 4 ++--
mm/shmem.c | 6 ++----
mm/truncate.c | 12 ++++--------
4 files changed, 10 insertions(+), 20 deletions(-)
diff --git a/mm/filemap.c b/mm/filemap.c
index 1b8022c18dc7..1f6be113a214 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2034,7 +2034,6 @@ static inline struct folio *find_get_entry(struct xa_state *xas, pgoff_t max,
* @start: The starting page cache index
* @end: The final page index (inclusive).
* @fbatch: Where the resulting entries are placed.
- * @indices: The cache indices corresponding to the entries in @entries
*
* find_get_entries() will search for and return a batch of entries in
* the mapping. The entries are placed in @fbatch. find_get_entries()
@@ -2050,7 +2049,7 @@ static inline struct folio *find_get_entry(struct xa_state *xas, pgoff_t max,
* Also updates @start to be positioned after the last found entry
*/
unsigned find_get_entries(struct address_space *mapping, pgoff_t *start,
- pgoff_t end, struct folio_batch *fbatch, pgoff_t *indices)
+ pgoff_t end, struct folio_batch *fbatch)
{
XA_STATE(xas, &mapping->i_pages, *start);
unsigned long nr;
@@ -2058,7 +2057,6 @@ unsigned find_get_entries(struct address_space *mapping, pgoff_t *start,
rcu_read_lock();
while ((folio = find_get_entry(&xas, end, XA_PRESENT)) != NULL) {
- indices[fbatch->nr] = xas.xa_index;
if (!folio_batch_add(fbatch, folio))
break;
}
@@ -2082,7 +2080,6 @@ unsigned find_get_entries(struct address_space *mapping, pgoff_t *start,
* @start: The starting page cache index.
* @end: The final page index (inclusive).
* @fbatch: Where the resulting entries are placed.
- * @indices: The cache indices of the entries in @fbatch.
*
* find_lock_entries() will return a batch of entries from @mapping.
* Swap, shadow and DAX entries are included. Folios are returned
@@ -2098,7 +2095,7 @@ unsigned find_get_entries(struct address_space *mapping, pgoff_t *start,
* Also updates @start to be positioned after the last found entry
*/
unsigned find_lock_entries(struct address_space *mapping, pgoff_t *start,
- pgoff_t end, struct folio_batch *fbatch, pgoff_t *indices)
+ pgoff_t end, struct folio_batch *fbatch)
{
XA_STATE(xas, &mapping->i_pages, *start);
unsigned long nr;
@@ -2119,7 +2116,6 @@ unsigned find_lock_entries(struct address_space *mapping, pgoff_t *start,
VM_BUG_ON_FOLIO(!folio_contains(folio, xas.xa_index),
folio);
}
- indices[fbatch->nr] = xas.xa_index;
if (!folio_batch_add(fbatch, folio))
break;
continue;
diff --git a/mm/internal.h b/mm/internal.h
index 68afdbe7106e..db8d5dfa6d68 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -107,9 +107,9 @@ static inline void force_page_cache_readahead(struct address_space *mapping,
}
unsigned find_lock_entries(struct address_space *mapping, pgoff_t *start,
- pgoff_t end, struct folio_batch *fbatch, pgoff_t *indices);
+ pgoff_t end, struct folio_batch *fbatch);
unsigned find_get_entries(struct address_space *mapping, pgoff_t *start,
- pgoff_t end, struct folio_batch *fbatch, pgoff_t *indices);
+ pgoff_t end, struct folio_batch *fbatch);
void filemap_free_folio(struct address_space *mapping, struct folio *folio);
int truncate_inode_folio(struct address_space *mapping, struct folio *folio);
bool truncate_inode_partial_folio(struct folio *folio, loff_t start,
diff --git a/mm/shmem.c b/mm/shmem.c
index 8240e066edfc..ad6b5adf04ac 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -907,7 +907,6 @@ static void shmem_undo_range(struct inode *inode, loff_t lstart, loff_t lend,
pgoff_t start = (lstart + PAGE_SIZE - 1) >> PAGE_SHIFT;
pgoff_t end = (lend + 1) >> PAGE_SHIFT;
struct folio_batch fbatch;
- pgoff_t indices[PAGEVEC_SIZE];
struct folio *folio;
bool same_folio;
long nr_swaps_freed = 0;
@@ -923,7 +922,7 @@ static void shmem_undo_range(struct inode *inode, loff_t lstart, loff_t lend,
folio_batch_init(&fbatch);
index = start;
while (index < end && find_lock_entries(mapping, &index, end - 1,
- &fbatch, indices)) {
+ &fbatch)) {
for (i = 0; i < folio_batch_count(&fbatch); i++) {
folio = fbatch.folios[i];
@@ -973,8 +972,7 @@ static void shmem_undo_range(struct inode *inode, loff_t lstart, loff_t lend,
while (index < end) {
cond_resched();
- if (!find_get_entries(mapping, &index, end - 1, &fbatch,
- indices)) {
+ if (!find_get_entries(mapping, &index, end - 1, &fbatch)) {
/* If all gone or hole-punch or unfalloc, we're done */
if (index == start || end != -1)
break;
diff --git a/mm/truncate.c b/mm/truncate.c
index 4e63d885498a..9db247a88483 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -332,7 +332,6 @@ void truncate_inode_pages_range(struct address_space *mapping,
pgoff_t start; /* inclusive */
pgoff_t end; /* exclusive */
struct folio_batch fbatch;
- pgoff_t indices[PAGEVEC_SIZE];
pgoff_t index;
int i;
struct folio *folio;
@@ -361,7 +360,7 @@ void truncate_inode_pages_range(struct address_space *mapping,
folio_batch_init(&fbatch);
index = start;
while (index < end && find_lock_entries(mapping, &index, end - 1,
- &fbatch, indices)) {
+ &fbatch)) {
truncate_folio_batch_exceptionals(mapping, &fbatch);
for (i = 0; i < folio_batch_count(&fbatch); i++)
truncate_cleanup_folio(fbatch.folios[i]);
@@ -399,8 +398,7 @@ void truncate_inode_pages_range(struct address_space *mapping,
index = start;
while (index < end) {
cond_resched();
- if (!find_get_entries(mapping, &index, end - 1, &fbatch,
- indices)) {
+ if (!find_get_entries(mapping, &index, end - 1, &fbatch)) {
/* If all gone from start onwards, we're done */
if (index == start)
break;
@@ -497,7 +495,6 @@ EXPORT_SYMBOL(truncate_inode_pages_final);
unsigned long invalidate_mapping_pagevec(struct address_space *mapping,
pgoff_t start, pgoff_t end, unsigned long *nr_pagevec)
{
- pgoff_t indices[PAGEVEC_SIZE];
struct folio_batch fbatch;
pgoff_t index = start;
unsigned long ret;
@@ -505,7 +502,7 @@ unsigned long invalidate_mapping_pagevec(struct address_space *mapping,
int i;
folio_batch_init(&fbatch);
- while (find_lock_entries(mapping, &index, end, &fbatch, indices)) {
+ while (find_lock_entries(mapping, &index, end, &fbatch)) {
for (i = 0; i < folio_batch_count(&fbatch); i++) {
struct folio *folio = fbatch.folios[i];
@@ -620,7 +617,6 @@ static int folio_launder(struct address_space *mapping, struct folio *folio)
int invalidate_inode_pages2_range(struct address_space *mapping,
pgoff_t start, pgoff_t end)
{
- pgoff_t indices[PAGEVEC_SIZE];
struct folio_batch fbatch;
pgoff_t index;
int i;
@@ -633,7 +629,7 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
folio_batch_init(&fbatch);
index = start;
- while (find_get_entries(mapping, &index, end, &fbatch, indices)) {
+ while (find_get_entries(mapping, &index, end, &fbatch)) {
for (i = 0; i < folio_batch_count(&fbatch); i++) {
struct folio *folio = fbatch.folios[i];
--
2.36.1
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