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Diffstat (limited to '')
| -rw-r--r-- | debian/patches-rt/0217-arm-highmem-Flush-tlb-on-unmap.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/debian/patches-rt/0217-arm-highmem-Flush-tlb-on-unmap.patch b/debian/patches-rt/0217-arm-highmem-Flush-tlb-on-unmap.patch new file mode 100644 index 000000000..12a3a9b1e --- /dev/null +++ b/debian/patches-rt/0217-arm-highmem-Flush-tlb-on-unmap.patch @@ -0,0 +1,34 @@ +From 83b4c6d1975b6bbcc60751fc7150c6bda6b460a7 Mon Sep 17 00:00:00 2001 +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Mon, 11 Mar 2013 21:37:27 +0100 +Subject: [PATCH 217/347] arm/highmem: Flush tlb on unmap +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz + +The tlb should be flushed on unmap and thus make the mapping entry +invalid. This is only done in the non-debug case which does not look +right. + +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + arch/arm/mm/highmem.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/arch/arm/mm/highmem.c b/arch/arm/mm/highmem.c +index d02f8187b1cc..eb4b225d28c9 100644 +--- a/arch/arm/mm/highmem.c ++++ b/arch/arm/mm/highmem.c +@@ -112,10 +112,10 @@ void __kunmap_atomic(void *kvaddr) + __cpuc_flush_dcache_area((void *)vaddr, PAGE_SIZE); + #ifdef CONFIG_DEBUG_HIGHMEM + BUG_ON(vaddr != __fix_to_virt(idx)); +- set_fixmap_pte(idx, __pte(0)); + #else + (void) idx; /* to kill a warning */ + #endif ++ set_fixmap_pte(idx, __pte(0)); + kmap_atomic_idx_pop(); + } else if (vaddr >= PKMAP_ADDR(0) && vaddr < PKMAP_ADDR(LAST_PKMAP)) { + /* this address was obtained through kmap_high_get() */ +-- +2.36.1 + |