1 files changed, 0 insertions, 71 deletions
diff --git a/debian/patches-rt/0062-highmem-Don-t-disable-preemption-on-RT-in-kmap_atomi.patch b/debian/patches-rt/0062-highmem-Don-t-disable-preemption-on-RT-in-kmap_atomi.patch
deleted file mode 100644
index 81c5383dc..000000000
--- a/debian/patches-rt/0062-highmem-Don-t-disable-preemption-on-RT-in-kmap_atomi.patch
+++ /dev/null
@@ -1,71 +0,0 @@
-From f881a329342e9397a55eca767bf0e40e33a93906 Mon Sep 17 00:00:00 2001
-From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
-Date: Fri, 30 Oct 2020 13:59:06 +0100
-Subject: [PATCH 062/296] highmem: Don't disable preemption on RT in
- kmap_atomic()
-Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.10/older/patches-5.10.35-rt39.tar.xz
-
-Disabling preemption makes it impossible to acquire sleeping locks within
-kmap_atomic() section.
-For PREEMPT_RT it is sufficient to disable migration.
-
-Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
----
- include/linux/highmem-internal.h | 20 ++++++++++++++++----
- 1 file changed, 16 insertions(+), 4 deletions(-)
-
-diff --git a/include/linux/highmem-internal.h b/include/linux/highmem-internal.h
-index bd15bf9164c2..f9bc6acd3679 100644
---- a/include/linux/highmem-internal.h
-+++ b/include/linux/highmem-internal.h
-@@ -90,7 +90,10 @@ static inline void __kunmap_local(void *vaddr)
- 
- static inline void *kmap_atomic(struct page *page)
- {
--	preempt_disable();
-+	if (IS_ENABLED(CONFIG_PREEMPT_RT))
-+		migrate_disable();
-+	else
-+		preempt_disable();
- 	pagefault_disable();
- 	return __kmap_local_page_prot(page, kmap_prot);
- }
-@@ -99,7 +102,10 @@ static inline void __kunmap_atomic(void *addr)
- {
- 	kunmap_local_indexed(addr);
- 	pagefault_enable();
--	preempt_enable();
-+	if (IS_ENABLED(CONFIG_PREEMPT_RT))
-+		migrate_enable();
-+	else
-+		preempt_enable();
- }
- 
- unsigned int __nr_free_highpages(void);
-@@ -172,7 +178,10 @@ static inline void __kunmap_local(void *addr)
- 
- static inline void *kmap_atomic(struct page *page)
- {
--	preempt_disable();
-+	if (IS_ENABLED(CONFIG_PREEMPT_RT))
-+		migrate_disable();
-+	else
-+		preempt_disable();
- 	pagefault_disable();
- 	return page_address(page);
- }
-@@ -183,7 +192,10 @@ static inline void __kunmap_atomic(void *addr)
- 	kunmap_flush_on_unmap(addr);
- #endif
- 	pagefault_enable();
--	preempt_enable();
-+	if (IS_ENABLED(CONFIG_PREEMPT_RT))
-+		migrate_enable();
-+	else
-+		preempt_enable();
- }
- 
- static inline unsigned int nr_free_highpages(void) { return 0; }
--- 
-2.30.2
-