1 files changed, 0 insertions, 84 deletions
diff --git a/features/rt/highmem-Don-t-disable-preemption-on-RT-in-kmap_atomi.patch b/features/rt/highmem-Don-t-disable-preemption-on-RT-in-kmap_atomi.patch
deleted file mode 100644
index 30c5cea1..00000000
--- a/features/rt/highmem-Don-t-disable-preemption-on-RT-in-kmap_atomi.patch
+++ /dev/null
@@ -1,84 +0,0 @@
-From a93cd2c33ab23c4dce5b28971b24ad3bb0a85d55 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 001/191] highmem: Don't disable preemption on RT in
- kmap_atomic()
-
-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 | 27 ++++++++++++++++++++++-----
- 1 file changed, 22 insertions(+), 5 deletions(-)
-
-diff --git a/include/linux/highmem-internal.h b/include/linux/highmem-internal.h
-index 7902c7d8b55f..4aa1031d3e4c 100644
---- a/include/linux/highmem-internal.h
-+++ b/include/linux/highmem-internal.h
-@@ -90,7 +90,11 @@ static inline void __kunmap_local(void *vaddr)
- 
- static inline void *kmap_atomic_prot(struct page *page, pgprot_t prot)
- {
--	preempt_disable();
-+	if (IS_ENABLED(CONFIG_PREEMPT_RT))
-+		migrate_disable();
-+	else
-+		preempt_disable();
-+
- 	pagefault_disable();
- 	return __kmap_local_page_prot(page, prot);
- }
-@@ -102,7 +106,11 @@ static inline void *kmap_atomic(struct page *page)
- 
- static inline void *kmap_atomic_pfn(unsigned long pfn)
- {
--	preempt_disable();
-+	if (IS_ENABLED(CONFIG_PREEMPT_RT))
-+		migrate_disable();
-+	else
-+		preempt_disable();
-+
- 	pagefault_disable();
- 	return __kmap_local_pfn_prot(pfn, kmap_prot);
- }
-@@ -111,7 +119,10 @@ 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);
-@@ -179,7 +190,10 @@ 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);
- }
-@@ -200,7 +214,10 @@ 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; }
--- 
-2.19.1
-