diff options
Diffstat (limited to 'arch/um/kernel/skas/uaccess.c')
| -rw-r--r-- | arch/um/kernel/skas/uaccess.c | 23 |
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; } |