From 0bf3b10d37ad5526e70f44665d6728e3945dd746 Mon Sep 17 00:00:00 2001
Message-Id: <0bf3b10d37ad5526e70f44665d6728e3945dd746.1599166690.git.zanussi@kernel.org>
In-Reply-To: <56457dc415803c8abc5acb513ada877a79596f05.1599166690.git.zanussi@kernel.org>
References: <56457dc415803c8abc5acb513ada877a79596f05.1599166690.git.zanussi@kernel.org>
From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 3 Jul 2009 08:44:34 -0500
Subject: [PATCH 063/333] mm/scatterlist: Do not disable irqs on RT
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.142-rt63.tar.xz

For -RT it is enough to keep pagefault disabled (which is currently handled by
kmap_atomic()).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 lib/scatterlist.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index 60e7eca2f4be..aad8b9ecd496 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -777,7 +777,7 @@ void sg_miter_stop(struct sg_mapping_iter *miter)
 			flush_kernel_dcache_page(miter->page);
 
 		if (miter->__flags & SG_MITER_ATOMIC) {
-			WARN_ON_ONCE(preemptible());
+			WARN_ON_ONCE(!pagefault_disabled());
 			kunmap_atomic(miter->addr);
 		} else
 			kunmap(miter->page);
-- 
2.17.1

