linux-kernel - [PATCH 1/6] zsmalloc: switch from alloc_vm_area to get_vm

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Date:   Fri, 18 Sep 2020 18:37:19 +0200
From:   Christoph Hellwig <hch@....de>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Minchan Kim <minchan@...nel.org>,
        Nitin Gupta <ngupta@...are.org>, x86@...nel.org,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-mm@...ck.org
Subject: [PATCH 1/6] zsmalloc: switch from alloc_vm_area to get_vm_area

There is no obvious reason why zsmalloc needs to pre-fault the PTEs
given that it later uses map_kernel_range to just like vmap().

Signed-off-by: Christoph Hellwig <hch@....de>
---
 mm/zsmalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index c36fdff9a37131..3e4fe3259612fd 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1122,7 +1122,7 @@ static inline int __zs_cpu_up(struct mapping_area *area)
 	 */
 	if (area->vm)
 		return 0;
-	area->vm = alloc_vm_area(PAGE_SIZE * 2, NULL);
+	area->vm = get_vm_area(PAGE_SIZE * 2, 0);
 	if (!area->vm)
 		return -ENOMEM;
 	return 0;
-- 
2.28.0