1 files changed, 0 insertions, 69 deletions
diff --git a/debian/patches-rt/re-preempt_rt_full-arm-coredump-fails-for-cpu-3e-3d-4.patch b/debian/patches-rt/re-preempt_rt_full-arm-coredump-fails-for-cpu-3e-3d-4.patch
deleted file mode 100644
index 9374743db..000000000
--- a/debian/patches-rt/re-preempt_rt_full-arm-coredump-fails-for-cpu-3e-3d-4.patch
+++ /dev/null
@@ -1,69 +0,0 @@
-Subject: ARM: Initialize split page table locks for vector page
-From: Frank Rowand <frank.rowand@am.sony.com>
-Date: Sat, 1 Oct 2011 18:58:13 -0700
-Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.2/older/patches-5.2.17-rt9.tar.xz
-
-Without this patch, ARM can not use SPLIT_PTLOCK_CPUS if
-PREEMPT_RT_FULL=y because vectors_user_mapping() creates a
-VM_ALWAYSDUMP mapping of the vector page (address 0xffff0000), but no
-ptl->lock has been allocated for the page.  An attempt to coredump
-that page will result in a kernel NULL pointer dereference when
-follow_page() attempts to lock the page.
-
-The call tree to the NULL pointer dereference is:
-
-   do_notify_resume()
-      get_signal_to_deliver()
-         do_coredump()
-            elf_core_dump()
-               get_dump_page()
-                  __get_user_pages()
-                     follow_page()
-                        pte_offset_map_lock() <----- a #define
-                           ...
-                              rt_spin_lock()
-
-The underlying problem is exposed by mm-shrink-the-page-frame-to-rt-size.patch.
-
-Signed-off-by: Frank Rowand <frank.rowand@am.sony.com>
-Cc: Frank <Frank_Rowand@sonyusa.com>
-Cc: Peter Zijlstra <peterz@infradead.org>
-Link: http://lkml.kernel.org/r/4E87C535.2030907@am.sony.com
-Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
----
- arch/arm/kernel/process.c |   24 ++++++++++++++++++++++++
- 1 file changed, 24 insertions(+)
-
---- a/arch/arm/kernel/process.c
-+++ b/arch/arm/kernel/process.c
-@@ -325,6 +325,30 @@ unsigned long arch_randomize_brk(struct
- }
- 
- #ifdef CONFIG_MMU
-+/*
-+ * CONFIG_SPLIT_PTLOCK_CPUS results in a page->ptl lock.  If the lock is not
-+ * initialized by pgtable_page_ctor() then a coredump of the vector page will
-+ * fail.
-+ */
-+static int __init vectors_user_mapping_init_page(void)
-+{
-+	struct page *page;
-+	unsigned long addr = 0xffff0000;
-+	pgd_t *pgd;
-+	pud_t *pud;
-+	pmd_t *pmd;
-+
-+	pgd = pgd_offset_k(addr);
-+	pud = pud_offset(pgd, addr);
-+	pmd = pmd_offset(pud, addr);
-+	page = pmd_page(*(pmd));
-+
-+	pgtable_page_ctor(page);
-+
-+	return 0;
-+}
-+late_initcall(vectors_user_mapping_init_page);
-+
- #ifdef CONFIG_KUSER_HELPERS
- /*
-  * The vectors page is always readable from user space for the