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From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
To: akpm@linux-foundation.org
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
	linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v11 01/33] mm: Convert get_page_unless_zero() to return bool
Date: Mon, 14 Jun 2021 21:14:03 +0100	[thread overview]
Message-ID: <20210614201435.1379188-2-willy@infradead.org> (raw)
In-Reply-To: <20210614201435.1379188-1-willy@infradead.org>

atomic_add_unless() returns bool, so remove the widening casts to int
in page_ref_add_unless() and get_page_unless_zero().  This causes gcc
to produce slightly larger code in isolate_migratepages_block(), but
it's not clear that it's worse code.  Net +19 bytes of text.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 include/linux/mm.h       | 2 +-
 include/linux/page_ref.h | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 9c9430f063a7..877eb8730eea 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -757,7 +757,7 @@ static inline int put_page_testzero(struct page *page)
  * This can be called when MMU is off so it must not access
  * any of the virtual mappings.
  */
-static inline int get_page_unless_zero(struct page *page)
+static inline bool get_page_unless_zero(struct page *page)
 {
 	return page_ref_add_unless(page, 1, 0);
 }
diff --git a/include/linux/page_ref.h b/include/linux/page_ref.h
index 7ad46f45df39..3a799de8ad52 100644
--- a/include/linux/page_ref.h
+++ b/include/linux/page_ref.h
@@ -161,9 +161,9 @@ static inline int page_ref_dec_return(struct page *page)
 	return ret;
 }
 
-static inline int page_ref_add_unless(struct page *page, int nr, int u)
+static inline bool page_ref_add_unless(struct page *page, int nr, int u)
 {
-	int ret = atomic_add_unless(&page->_refcount, nr, u);
+	bool ret = atomic_add_unless(&page->_refcount, nr, u);
 
 	if (page_ref_tracepoint_active(page_ref_mod_unless))
 		__page_ref_mod_unless(page, nr, ret);
-- 
2.30.2


  reply	other threads:[~2021-06-14 20:16 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-14 20:14 [PATCH v11 00/33] Memory folios Matthew Wilcox (Oracle)
2021-06-14 20:14 ` Matthew Wilcox (Oracle) [this message]
2021-06-15  6:24   ` [PATCH v11 01/33] mm: Convert get_page_unless_zero() to return bool Christoph Hellwig
2021-06-14 20:14 ` [PATCH v11 02/33] mm: Introduce struct folio Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 03/33] mm: Add folio_pgdat(), folio_zone() and folio_zonenum() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 04/33] mm/vmstat: Add functions to account folio statistics Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 05/33] mm/debug: Add VM_BUG_ON_FOLIO() and VM_WARN_ON_ONCE_FOLIO() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 06/33] mm: Add folio reference count functions Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 07/33] mm: Add folio_put() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 08/33] mm: Add folio_get() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 09/33] mm: Add folio_try_get_rcu() Matthew Wilcox (Oracle)
2021-06-15  6:25   ` Christoph Hellwig
2021-06-14 20:14 ` [PATCH v11 10/33] mm: Add folio flag manipulation functions Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 11/33] mm/lru: Add folio LRU functions Matthew Wilcox (Oracle)
2021-06-15  6:27   ` Christoph Hellwig
2021-06-14 20:14 ` [PATCH v11 12/33] mm: Handle per-folio private data Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 13/33] mm/filemap: Add folio_index(), folio_file_page() and folio_contains() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 14/33] mm/filemap: Add folio_next_index() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 15/33] mm/filemap: Add folio_offset() and folio_file_offset() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 16/33] mm/util: Add folio_mapping() and folio_file_mapping() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 17/33] mm/memcg: Add folio wrappers for various functions Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 18/33] mm/filemap: Add folio_unlock() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 19/33] mm/filemap: Add folio_lock() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 20/33] mm/filemap: Add folio_lock_killable() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 21/33] mm/filemap: Add __folio_lock_async() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 22/33] mm/filemap: Add folio_wait_locked() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 23/33] mm/filemap: Add __folio_lock_or_retry() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 24/33] mm/swap: Add folio_rotate_reclaimable() Matthew Wilcox (Oracle)
2021-06-15  6:29   ` Christoph Hellwig
2021-06-14 20:14 ` [PATCH v11 25/33] mm/filemap: Add folio_end_writeback() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 26/33] mm/writeback: Add folio_wait_writeback() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 27/33] mm/writeback: Add folio_wait_stable() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 28/33] mm/filemap: Add folio_wait_bit() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 29/33] mm/filemap: Add folio_wake_bit() Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 30/33] mm/filemap: Convert page wait queues to be folios Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 31/33] mm/filemap: Add folio private_2 functions Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 32/33] fs/netfs: Add folio fscache functions Matthew Wilcox (Oracle)
2021-06-14 20:14 ` [PATCH v11 33/33] mm: Add folio_mapped() Matthew Wilcox (Oracle)
2021-06-15  6:31   ` Christoph Hellwig
2021-06-16  9:16 ` [PATCH v11 32/33] fs/netfs: Add folio fscache functions David Howells
2021-06-16  9:19 ` [PATCH v11 01/33] mm: Convert get_page_unless_zero() to return bool David Howells
2021-06-16  9:31 ` [PATCH v11 02/33] mm: Introduce struct folio David Howells
2021-06-16  9:36 ` [PATCH v11 04/33] mm/vmstat: Add functions to account folio statistics David Howells
2021-06-16  9:54 ` [PATCH v11 05/33] mm/debug: Add VM_BUG_ON_FOLIO() and VM_WARN_ON_ONCE_FOLIO() David Howells
2021-06-16  9:55 ` [PATCH v11 06/33] mm: Add folio reference count functions David Howells
2021-06-16  9:55 ` [PATCH v11 07/33] mm: Add folio_put() David Howells
2021-06-16  9:56 ` [PATCH v11 08/33] mm: Add folio_get() David Howells
2021-06-16  9:58 ` [PATCH v11 10/33] mm: Add folio flag manipulation functions David Howells
2021-06-16 10:00 ` [PATCH v11 11/33] mm/lru: Add folio LRU functions David Howells
2021-06-16 10:03 ` [PATCH v11 13/33] mm/filemap: Add folio_index(), folio_file_page() and folio_contains() David Howells
2021-06-16 11:38   ` Matthew Wilcox
2021-06-16 10:04 ` [PATCH v11 14/33] mm/filemap: Add folio_next_index() David Howells
2021-06-16 10:05 ` [PATCH v11 15/33] mm/filemap: Add folio_offset() and folio_file_offset() David Howells
2021-06-16 10:10 ` [PATCH v11 16/33] mm/util: Add folio_mapping() and folio_file_mapping() David Howells
2021-06-16 10:13 ` [PATCH v11 18/33] mm/filemap: Add folio_unlock() David Howells
2021-06-16 10:17 ` [PATCH v11 19/33] mm/filemap: Add folio_lock() David Howells
2021-06-16 10:22 ` [PATCH v11 21/33] mm/filemap: Add __folio_lock_async() David Howells
2021-06-16 10:23 ` [PATCH v11 22/33] mm/filemap: Add folio_wait_locked() David Howells
2021-06-16 10:27 ` [PATCH v11 24/33] mm/swap: Add folio_rotate_reclaimable() David Howells
2021-06-16 11:46   ` Matthew Wilcox
2021-06-16 10:30 ` [PATCH v11 26/33] mm/writeback: Add folio_wait_writeback() David Howells
2021-06-16 11:55   ` Matthew Wilcox
2021-06-16 10:32 ` [PATCH v11 27/33] mm/writeback: Add folio_wait_stable() David Howells
2021-06-16 10:33 ` [PATCH v11 28/33] mm/filemap: Add folio_wait_bit() David Howells
2021-06-16 10:35 ` [PATCH v11 30/33] mm/filemap: Convert page wait queues to be folios David Howells
2021-06-16 10:37 ` [PATCH v11 33/33] mm: Add folio_mapped() David Howells
2021-06-16 10:41 ` [PATCH v11 02/33] mm: Introduce struct folio David Howells
2021-06-16 10:54 ` [PATCH v11 00/33] Memory folios David Howells

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