+ mm-zsmalloc-get-rid-of-page_mask.patch added to mm-unstable branch

+ mm-zsmalloc-get-rid-of-page_mask.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/zsmalloc: get rid of PAGE_MASK
has been added to the -mm mm-unstable branch.  Its filename is
     mm-zsmalloc-get-rid-of-page_mask.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-zsmalloc-get-rid-of-page_mask.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Alexey Romanov <avromanov@sberdevices.ru>
Subject: mm/zsmalloc: get rid of PAGE_MASK
Date: Tue, 16 May 2023 12:50:29 +0300

Use offset_in_page() macro instead of 'val & ~PAGE_MASK'

Link: https://lkml.kernel.org/r/20230516095029.49036-2-avromanov@sberdevices.ru
Signed-off-by: Alexey Romanov <avromanov@sberdevices.ru>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/zsmalloc.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

--- a/mm/zsmalloc.c~mm-zsmalloc-get-rid-of-page_mask
+++ a/mm/zsmalloc.c
@@ -1341,7 +1341,7 @@ void *zs_map_object(struct zs_pool *pool
 	spin_unlock(&pool->lock);
 
 	class = zspage_class(pool, zspage);
-	off = (class->size * obj_idx) & ~PAGE_MASK;
+	off = offset_in_page(class->size * obj_idx);
 
 	local_lock(&zs_map_area.lock);
 	area = this_cpu_ptr(&zs_map_area);
@@ -1381,7 +1381,7 @@ void zs_unmap_object(struct zs_pool *poo
 	obj_to_location(obj, &page, &obj_idx);
 	zspage = get_zspage(page);
 	class = zspage_class(pool, zspage);
-	off = (class->size * obj_idx) & ~PAGE_MASK;
+	off = offset_in_page(class->size * obj_idx);
 
 	area = this_cpu_ptr(&zs_map_area);
 	if (off + class->size <= PAGE_SIZE)
@@ -1438,7 +1438,7 @@ static unsigned long obj_malloc(struct z
 
 	offset = obj * class->size;
 	nr_page = offset >> PAGE_SHIFT;
-	m_offset = offset & ~PAGE_MASK;
+	m_offset = offset_in_page(offset);
 	m_page = get_first_page(zspage);
 
 	for (i = 0; i < nr_page; i++)
@@ -1548,7 +1548,7 @@ static void obj_free(int class_size, uns
 	void *vaddr;
 
 	obj_to_location(obj, &f_page, &f_objidx);
-	f_offset = (class_size * f_objidx) & ~PAGE_MASK;
+	f_offset = offset_in_page(class_size * f_objidx);
 	zspage = get_zspage(f_page);
 
 	vaddr = kmap_atomic(f_page);
@@ -1640,8 +1640,8 @@ static void zs_object_copy(struct size_c
 	obj_to_location(src, &s_page, &s_objidx);
 	obj_to_location(dst, &d_page, &d_objidx);
 
-	s_off = (class->size * s_objidx) & ~PAGE_MASK;
-	d_off = (class->size * d_objidx) & ~PAGE_MASK;
+	s_off = offset_in_page(class->size * s_objidx);
+	d_off = offset_in_page(class->size * d_objidx);
 
 	if (s_off + class->size > PAGE_SIZE)
 		s_size = PAGE_SIZE - s_off;
_

Patches currently in -mm which might be from avromanov@sberdevices.ru are

mm-zsmalloc-get-rid-of-page_mask.patch