diff options
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/compat/linuxkpi/common/include/linux/uaccess.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/uaccess.h b/sys/compat/linuxkpi/common/include/linux/uaccess.h index b7e23922720a..c046e1c063a1 100644 --- a/sys/compat/linuxkpi/common/include/linux/uaccess.h +++ b/sys/compat/linuxkpi/common/include/linux/uaccess.h @@ -67,6 +67,13 @@ extern int linux_copyout(const void *kaddr, void *uaddr, size_t len); extern size_t linux_clear_user(void *uaddr, size_t len); extern int linux_access_ok(int rw, const void *uaddr, size_t len); +/* + * NOTE: Each pagefault_disable() call must have a corresponding + * pagefault_enable() call in the same scope. The former creates a new + * block and defines a temporary variable, and the latter uses the + * temporary variable and closes the block. Failure to balance the + * calls will result in a compile-time error. + */ #define pagefault_disable(void) do { \ int __saved_pflags = \ vm_fault_disable_pagefaults() |