e9666d10a5
Currently, CONFIG_JUMP_LABEL just means "I _want_ to use jump label". The jump label is controlled by HAVE_JUMP_LABEL, which is defined like this: #if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL) # define HAVE_JUMP_LABEL #endif We can improve this by testing 'asm goto' support in Kconfig, then make JUMP_LABEL depend on CC_HAS_ASM_GOTO. Ugly #ifdef HAVE_JUMP_LABEL will go away, and CONFIG_JUMP_LABEL will match to the real kernel capability. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
23 lines
511 B
Bash
Executable File
23 lines
511 B
Bash
Executable File
#!/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
|