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Diffstat (limited to 'arch/um/kernel/skas/uaccess.c')
-rw-r--r--arch/um/kernel/skas/uaccess.c23
1 files changed, 12 insertions, 11 deletions
diff --git a/arch/um/kernel/skas/uaccess.c b/arch/um/kernel/skas/uaccess.c
index d450797a3a7c..7f06fdbc7ee1 100644
--- a/arch/um/kernel/skas/uaccess.c
+++ b/arch/um/kernel/skas/uaccess.c
@@ -62,27 +62,28 @@ static int do_op_one_page(unsigned long addr, int len, int is_write,
jmp_buf buf;
struct page *page;
pte_t *pte;
- int n, faulted;
+ int n;
pte = maybe_map(addr, is_write);
if (pte == NULL)
return -1;
page = pte_page(*pte);
+#ifdef CONFIG_64BIT
+ pagefault_disable();
+ addr = (unsigned long) page_address(page) +
+ (addr & ~PAGE_MASK);
+#else
addr = (unsigned long) kmap_atomic(page) +
(addr & ~PAGE_MASK);
+#endif
+ n = (*op)(addr, len, arg);
- current->thread.fault_catcher = &buf;
-
- faulted = UML_SETJMP(&buf);
- if (faulted == 0)
- n = (*op)(addr, len, arg);
- else
- n = -1;
-
- current->thread.fault_catcher = NULL;
-
+#ifdef CONFIG_64BIT
+ pagefault_enable();
+#else
kunmap_atomic((void *)addr);
+#endif
return n;
}