aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mm/fault.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mm/fault.c')
-rw-r--r--arch/arm/mm/fault.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index 07565b593ed68..439dc6a26bb98 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -25,6 +25,13 @@
#include "fault.h"
+bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size)
+{
+ unsigned long addr = (unsigned long)unsafe_src;
+
+ return addr >= TASK_SIZE && ULONG_MAX - addr >= size;
+}
+
#ifdef CONFIG_MMU
/*
@@ -588,6 +595,7 @@ do_PrefetchAbort(unsigned long addr, unsigned int ifsr, struct pt_regs *regs)
if (!inf->fn(addr, ifsr | FSR_LNX_PF, regs))
return;
+ pr_alert("8<--- cut here ---\n");
pr_alert("Unhandled prefetch abort: %s (0x%03x) at 0x%08lx\n",
inf->name, ifsr, addr);