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authorNick Desaulniers <ndesaulniers@google.com>2022-08-19 12:06:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-08-21 10:06:28 -0700
commita0a12c3ed057af57552bf6c0aeaca6835693df04 (patch)
treecf05961f6278ab64839aa82f161e41ceda669c06 /scripts
parent15b3f48a4339e3c16acf18624e2b7f60bc5e9a2c (diff)
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 <bp@suse.de> Suggested-by: Masahiro Yamada <masahiroy@kernel.org> Suggested-by: Alexei Starovoitov <alexei.starovoitov@gmail.com> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/gcc-goto.sh22
1 files changed, 0 insertions, 22 deletions
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 <jbaron@redhat.com>
-
-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