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The vector instruction macros can also be used in inline assemblies. For
this the magic
asm(".include \"asm/vx-insn.h\"\n");
must be added to C files in order to avoid that the pre-processor
eliminates the __ASSEMBLY__ guarded macros. This however comes with the
problem that changes to asm/vx-insn.h do not cause a recompile of C files
which have only this magic statement instead of a proper include statement.
This can be observed with the arch/s390/kernel/fpu.c file.
In order to fix this problem and also to avoid that the include must
be specified twice, add a wrapper include header file which will do
all necessary steps.
This way only the vx-insn.h header file needs to be included and changes to
the new vx-insn-asm.h header file cause a recompile of all dependent files
like it should.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
20 lines
441 B
C
20 lines
441 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Support for Vector Instructions
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*
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* This wrapper header file allows to use the vector instruction macros in
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* both assembler files as well as in inline assemblies in C files.
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*/
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#ifndef __ASM_S390_VX_INSN_H
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#define __ASM_S390_VX_INSN_H
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#include <asm/vx-insn-asm.h>
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#ifndef __ASSEMBLY__
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asm(".include \"asm/vx-insn-asm.h\"\n");
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_S390_VX_INSN_H */
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