| Message ID | 20210614201435.1379188-2-willy@infradead.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Memory folios | expand |
On Mon, Jun 14, 2021 at 09:14:03PM +0100, Matthew Wilcox (Oracle) wrote: > 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. Strange. Anyway, this looks like the right type, so: Reviewed-by: Christoph Hellwig <hch@lst.de>
Matthew Wilcox (Oracle) <willy@infradead.org> wrote: > 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> Reviewed-by: David Howells <dhowells@redhat.com>
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);
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(-)