From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Galbraith Subject: [patch] mm/zsmalloc: Use get/put_cpu_light in zs_map_object()/zs_unmap_object() Date: Tue, 22 Mar 2016 11:16:09 +0100 Message-ID: <1458641769.15742.2.camel@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit To: Sebastian Andrzej Siewior , RT Return-path: Received: from mail-wm0-f48.google.com ([74.125.82.48]:34990 "EHLO mail-wm0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758413AbcCVKQM (ORCPT ); Tue, 22 Mar 2016 06:16:12 -0400 Received: by mail-wm0-f48.google.com with SMTP id l68so144894571wml.0 for ; Tue, 22 Mar 2016 03:16:12 -0700 (PDT) Sender: linux-rt-users-owner@vger.kernel.org List-ID: Otherwise, we get a ___might_sleep() splat. Signed-off-by: Mike Galbraith --- mm/zsmalloc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -1292,7 +1292,7 @@ void *zs_map_object(struct zs_pool *pool class = pool->size_class[class_idx]; off = obj_idx_to_offset(page, obj_idx, class->size); - area = &get_cpu_var(zs_map_area); + area = per_cpu_ptr(&zs_map_area, get_cpu_light()); area->vm_mm = mm; if (off + class->size <= PAGE_SIZE) { /* this object is contained entirely within a page */ @@ -1345,7 +1345,7 @@ void zs_unmap_object(struct zs_pool *poo __zs_unmap_object(area, pages, off, class->size); } - put_cpu_var(zs_map_area); + put_cpu_light(); unpin_tag(handle); } EXPORT_SYMBOL_GPL(zs_unmap_object);