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Wed, 11 Mar 2026 12:51:56 -0700 (PDT) From: Joshua Hahn To: Minchan Kim , Sergey Senozhatsky Cc: Nhat Pham , Nhat Pham , Johannes Weiner , Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@meta.com Subject: [PATCH 02/11] mm/zsmalloc: Make all obj_idx unsigned ints Date: Wed, 11 Mar 2026 12:51:39 -0700 Message-ID: <20260311195153.4013476-3-joshua.hahnjy@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260311195153.4013476-1-joshua.hahnjy@gmail.com> References: <20260311195153.4013476-1-joshua.hahnjy@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" object indices, which describe the location of an object in a zspage, cannot be negative. To reflect this most helpers calculate and return these values as unsigned ints. Convert find_alloced_obj, the only function that calculates obj_idx as a signed int, to use an unsigned int as well. No functional change intended. Signed-off-by: Joshua Hahn Reviewed-by: Nhat Pham Reviewed-by: Yosry Ahmed --- mm/zsmalloc.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 7a9b8f55d529..7758486e1d06 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -1491,10 +1491,11 @@ static void zs_obj_copy(struct size_class *class, u= nsigned long dst, * return handle. */ static unsigned long find_alloced_obj(struct size_class *class, - struct zpdesc *zpdesc, int *obj_idx) + struct zpdesc *zpdesc, + unsigned int *obj_idx) { unsigned int offset; - int index =3D *obj_idx; + unsigned int index =3D *obj_idx; unsigned long handle =3D 0; void *addr =3D kmap_local_zpdesc(zpdesc); =20 @@ -1521,7 +1522,7 @@ static void migrate_zspage(struct zs_pool *pool, stru= ct zspage *src_zspage, { unsigned long used_obj, free_obj; unsigned long handle; - int obj_idx =3D 0; + unsigned int obj_idx =3D 0; struct zpdesc *s_zpdesc =3D get_first_zpdesc(src_zspage); struct size_class *class =3D pool->size_class[src_zspage->class]; =20 --=20 2.52.0