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/kernel/futex.c b/kernel/futex.c
index c20f06f..ee25f5b 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -729,7 +729,7 @@
int ret;
pagefault_disable();
- ret = __copy_from_user_inatomic(dest, from, sizeof(u32));
+ ret = __get_user(*dest, from);
pagefault_enable();
return ret ? -EFAULT : 0;