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authorMatthew Wilcox (Oracle) <willy@infradead.org>2021-02-25 17:16:11 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-02-26 09:40:59 -0800
commitcf2039af1a2eee58fdbfa68bc0c9123e77477645 (patch)
treed392e1056cf0c5ea499cf2b1ec21856a0dbfe336
parent38cefeb33749992ceaad6ea40e12f92aa8f8e28f (diff)
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mm: pass pvec directly to find_get_entries
All callers of find_get_entries() use a pvec, so pass it directly instead of manipulating it in the caller. Link: https://lkml.kernel.org/r/20201112212641.27837-14-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: William Kucharski <william.kucharski@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Chinner <dchinner@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Yang Shi <yang.shi@linux.alibaba.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/pagemap.h3
-rw-r--r--mm/filemap.c21
-rw-r--r--mm/shmem.c5
-rw-r--r--mm/swap.c4
4 files changed, 13 insertions, 20 deletions
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index fdb2c4e44851..20225b067583 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -451,8 +451,7 @@ static inline struct page *find_subpage(struct page *head, pgoff_t index)
}
unsigned find_get_entries(struct address_space *mapping, pgoff_t start,
- pgoff_t end, unsigned int nr_entries, struct page **entries,
- pgoff_t *indices);
+ pgoff_t end, struct pagevec *pvec, pgoff_t *indices);
unsigned find_get_pages_range(struct address_space *mapping, pgoff_t *start,
pgoff_t end, unsigned int nr_pages,
struct page **pages);
diff --git a/mm/filemap.c b/mm/filemap.c
index 65cfdff17ac6..43700480d897 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1866,14 +1866,12 @@ reset:
* @mapping: The address_space to search
* @start: The starting page cache index
* @end: The final page index (inclusive).
- * @nr_entries: The maximum number of entries
- * @entries: Where the resulting entries are placed
+ * @pvec: 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 group of up to
- * @nr_entries entries in the mapping. The entries are placed at
- * @entries. find_get_entries() takes a reference against any actual
- * pages it returns.
+ * find_get_entries() will search for and return a batch of entries in
+ * the mapping. The entries are placed in @pvec. find_get_entries()
+ * takes a reference on any actual pages it returns.
*
* The search returns a group of mapping-contiguous page cache entries
* with ascending indexes. There may be holes in the indices due to
@@ -1890,15 +1888,12 @@ reset:
* Return: the number of pages and shadow entries which were found.
*/
unsigned find_get_entries(struct address_space *mapping, pgoff_t start,
- pgoff_t end, unsigned int nr_entries, struct page **entries,
- pgoff_t *indices)
+ pgoff_t end, struct pagevec *pvec, pgoff_t *indices)
{
XA_STATE(xas, &mapping->i_pages, start);
struct page *page;
unsigned int ret = 0;
-
- if (!nr_entries)
- return 0;
+ unsigned nr_entries = PAGEVEC_SIZE;
rcu_read_lock();
while ((page = find_get_entry(&xas, end, XA_PRESENT))) {
@@ -1913,11 +1908,13 @@ unsigned find_get_entries(struct address_space *mapping, pgoff_t start,
}
indices[ret] = xas.xa_index;
- entries[ret] = page;
+ pvec->pages[ret] = page;
if (++ret == nr_entries)
break;
}
rcu_read_unlock();
+
+ pvec->nr = ret;
return ret;
}
diff --git a/mm/shmem.c b/mm/shmem.c
index 4aac760aa2d4..ee8f21832f98 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -965,9 +965,8 @@ static void shmem_undo_range(struct inode *inode, loff_t lstart, loff_t lend,
while (index < end) {
cond_resched();
- pvec.nr = find_get_entries(mapping, index, end - 1,
- PAGEVEC_SIZE, pvec.pages, indices);
- if (!pvec.nr) {
+ if (!find_get_entries(mapping, index, end - 1, &pvec,
+ indices)) {
/* If all gone or hole-punch or unfalloc, we're done */
if (index == start || end != -1)
break;
diff --git a/mm/swap.c b/mm/swap.c
index cd9e1ed7e78f..d20a746a831e 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -1046,9 +1046,7 @@ unsigned pagevec_lookup_entries(struct pagevec *pvec,
struct address_space *mapping, pgoff_t start, pgoff_t end,
pgoff_t *indices)
{
- pvec->nr = find_get_entries(mapping, start, end, PAGEVEC_SIZE,
- pvec->pages, indices);
- return pagevec_count(pvec);
+ return find_get_entries(mapping, start, end, pvec, indices);
}
/**