mm/uaccess, mm/fault: Clarify that uaccess may only sleep if pagefaults are enabled

[firefly-linux-kernel-4.4.55.git] / lib / strnlen_user.c

diff --git a/lib/strnlen_user.c b/lib/strnlen_user.c
index a28df5206d95c24d6f3b4116753747f1fb2a67e3..36c15a2889e44fc062463ef24f132d0dd7b33def 100644 (file)
--- a/lib/strnlen_user.c
+++ b/lib/strnlen_user.c
@@ -84,7 +84,8 @@ static inline long do_strnlen_user(const char __user *src, unsigned long count,
  * @str: The string to measure.
  * @count: Maximum count (including NUL character)
  *
- * Context: User context only.  This function may sleep.
+ * Context: User context only. This function may sleep if pagefaults are
+ *          enabled.
  *
  * Get the size of a NUL-terminated string in user space.
  *
@@ -113,7 +114,8 @@ EXPORT_SYMBOL(strnlen_user);
  * strlen_user: - Get the size of a user string INCLUDING final NUL.
  * @str: The string to measure.
  *
- * Context: User context only.  This function may sleep.
+ * Context: User context only. This function may sleep if pagefaults are
+ *          enabled.
  *
  * Get the size of a NUL-terminated string in user space.
  *