diff options
Diffstat (limited to 'debian/patches-rt/0216-x86-highmem-Add-a-already-used-pte-check.patch')
| -rw-r--r-- | debian/patches-rt/0216-x86-highmem-Add-a-already-used-pte-check.patch | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/debian/patches-rt/0216-x86-highmem-Add-a-already-used-pte-check.patch b/debian/patches-rt/0216-x86-highmem-Add-a-already-used-pte-check.patch new file mode 100644 index 000000000..1ed131e93 --- /dev/null +++ b/debian/patches-rt/0216-x86-highmem-Add-a-already-used-pte-check.patch @@ -0,0 +1,29 @@ +From 0aa2a1e54dccb65560925aedd34406b867f182ce Mon Sep 17 00:00:00 2001 +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Mon, 11 Mar 2013 17:09:55 +0100 +Subject: [PATCH 216/347] x86/highmem: Add a "already used pte" check +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz + +This is a copy from kmap_atomic_prot(). + +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + arch/x86/mm/iomap_32.c | 2 ++ + 1 file changed, 2 insertions(+) + +diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c +index d5a48210d0f6..c0ec8d430c02 100644 +--- a/arch/x86/mm/iomap_32.c ++++ b/arch/x86/mm/iomap_32.c +@@ -69,6 +69,8 @@ void *kmap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot) + type = kmap_atomic_idx_push(); + idx = type + KM_TYPE_NR * smp_processor_id(); + vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); ++ WARN_ON(!pte_none(*(kmap_pte - idx))); ++ + #ifdef CONFIG_PREEMPT_RT_FULL + current->kmap_pte[type] = pte; + #endif +-- +2.36.1 + |