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From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 3 Jul 2009 08:44:34 -0500
Subject: [PATCH 063/353] mm/scatterlist: Do not disable irqs on RT
Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=44fe2fd54347e2dd0cdc3c69d217877623865c57
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 3b859201f84c..093c3aa3d895 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);
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