x86/uaccess: utilize CONFIG_CC_HAS_ASM_GOTO_OUTPUT
Clang-11 shipped support for outputs to asm goto statments along the fallthrough path. Double up some of the get_user() and related macros to be able to take advantage of this extended GNU C extension. This should help improve the generated code's performance for these accesses. Cc: Bill Wendling <morbo@google.com> Suggested-by: NLinus Torvalds <torvalds@linux-foundation.org> Signed-off-by: NNick Desaulniers <ndesaulniers@google.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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