VisionFive2 Linux kernel

StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)

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author: Thomas Gleixner <tglx@linutronix.de> 2021-10-15 23:14:09 +0200 committer: Minda Chen <minda.chen@starfivetech.com> 2023-11-06 19:24:39 +0800 commit: 48212a8bfc1ee46c1623056100e87419f989edd0 parent: 698b2a32c0aa13bb2eb8fb625b22c96553cb91f0
Commit Summary:
mm/scatterlist: Replace the !preemptible warning in sg_miter_stop()
Diffstat:
1 file changed, 4 insertions, 7 deletions
diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index abb3432ed744..d5e82e4a57ad 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -828,8 +828,7 @@ static bool sg_miter_get_next_page(struct sg_mapping_iter *miter)
  *   stops @miter.
  *
  * Context:
- *   Don't care if @miter is stopped, or not proceeded yet.
- *   Otherwise, preemption disabled if the SG_MITER_ATOMIC is set.
+ *   Don't care.
  *
  * Returns:
  *   true if @miter contains the valid mapping.  false if end of sg
@@ -865,8 +864,7 @@ EXPORT_SYMBOL(sg_miter_skip);
  *   @miter->addr and @miter->length point to the current mapping.
  *
  * Context:
- *   Preemption disabled if SG_MITER_ATOMIC.  Preemption must stay disabled
- *   till @miter is stopped.  May sleep if !SG_MITER_ATOMIC.
+ *   May sleep if !SG_MITER_ATOMIC.
  *
  * Returns:
  *   true if @miter contains the next mapping.  false if end of sg
@@ -906,8 +904,7 @@ EXPORT_SYMBOL(sg_miter_next);
  *   need to be released during iteration.
  *
  * Context:
- *   Preemption disabled if the SG_MITER_ATOMIC is set.  Don't care
- *   otherwise.
+ *   Don't care otherwise.
  */
 void sg_miter_stop(struct sg_mapping_iter *miter)
 {
@@ -922,7 +919,7 @@ void sg_miter_stop(struct sg_mapping_iter *miter)
 			flush_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);