From a0a12c3ed057af57552bf6c0aeaca6835693df04 Mon Sep 17 00:00:00 2001 From: Nick Desaulniers Date: Fri, 19 Aug 2022 12:06:40 -0700 Subject: asm goto: eradicate CC_HAS_ASM_GOTO GCC has supported asm goto since 4.5, and Clang has since version 9.0.0. The minimum supported versions of these tools for the build according to Documentation/process/changes.rst are 5.1 and 11.0.0 respectively. Remove the feature detection script, Kconfig option, and clean up some fallback code that is no longer supported. The removed script was also testing for a GCC specific bug that was fixed in the 4.7 release. Also remove workarounds for bpftrace using clang older than 9.0.0, since other BPF backend fixes are required at this point. Link: https://lore.kernel.org/lkml/CAK7LNATSr=BXKfkdW8f-H5VT_w=xBpT2ZQcZ7rm6JfkdE+QnmA@mail.gmail.com/ Link: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48637 Acked-by: Borislav Petkov Suggested-by: Masahiro Yamada Suggested-by: Alexei Starovoitov Signed-off-by: Nick Desaulniers Reviewed-by: Ingo Molnar Reviewed-by: Nathan Chancellor Reviewed-by: Alexandre Belloni Signed-off-by: Linus Torvalds --- scripts/gcc-goto.sh | 22 ---------------------- 1 file changed, 22 deletions(-) delete mode 100755 scripts/gcc-goto.sh (limited to 'scripts/gcc-goto.sh') diff --git a/scripts/gcc-goto.sh b/scripts/gcc-goto.sh deleted file mode 100755 index 8b980fb2270a..000000000000 --- a/scripts/gcc-goto.sh +++ /dev/null @@ -1,22 +0,0 @@ -#!/bin/sh -# SPDX-License-Identifier: GPL-2.0 -# Test for gcc 'asm goto' support -# Copyright (C) 2010, Jason Baron - -cat << "END" | $@ -x c - -fno-PIE -c -o /dev/null -int main(void) -{ -#if defined(__arm__) || defined(__aarch64__) - /* - * Not related to asm goto, but used by jump label - * and broken on some ARM GCC versions (see GCC Bug 48637). - */ - static struct { int dummy; int state; } tp; - asm (".long %c0" :: "i" (&tp.state)); -#endif - -entry: - asm goto ("" :::: entry); - return 0; -} -END -- cgit v1.2.3