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 <torvalds@linux-foundation.org>
diff --git a/mm/maccess.c b/mm/maccess.c
index d159b1c..78f9274 100644
--- a/mm/maccess.c
+++ b/mm/maccess.c
@@ -96,8 +96,7 @@
pagefault_disable();
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';