path: root/mm/maccess.c
diff options
authorLinus Torvalds <>2016-05-22 17:21:27 -0700
committerLinus Torvalds <>2016-05-22 17:21:27 -0700
commitbd28b14591b98f696bc9f94c5ba2e598ca487dfd (patch)
tree5cd165412fa7dec2dbbac28ff6d8d5b12d3011f4 /mm/maccess.c
parent5b09c3edecd37ec1a52fbd5ae97a19734edc7a77 (diff)
x86: remove more uaccess_32.h complexity
I'm looking at trying to possibly merge the 32-bit and 64-bit versions of the x86 uaccess.h implementation, but first this needs to be cleaned up. For example, the 32-bit version of "__copy_from_user_inatomic()" is mostly the special cases for the constant size, and it's actually almost never relevant. Most users aren't actually using a constant size anyway, and the few cases that do small constant copies are better off just using __get_user() instead. So get rid of the unnecessary complexity. Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'mm/maccess.c')
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/maccess.c b/mm/maccess.c
index d159b1c96e48..78f9274dd49d 100644
--- a/mm/maccess.c
+++ b/mm/maccess.c
@@ -96,8 +96,7 @@ long strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count)
do {
- ret = __copy_from_user_inatomic(dst++,
- (const void __user __force *)src++, 1);
+ ret = __get_user(*dst++, (const char __user __force *)src++);
} while (dst[-1] && ret == 0 && src - unsafe_addr < count);
dst[-1] = '\0';