This patch refactors the UAPI header definitions for the Arm SVE
extension to avoid multiple-definition problems when userspace mixes its
own sigcontext.h definitions with the kernel's ptrace.h (which is
apparently routine).
A common backend header is created to hold common definitions, suitably
namespaced, and with an appropriate header guard.
See the commit message in patch 3 for further explanation of why this
is needed.
Because of the non-trivial header guard in the new sve_context.h, patch
1 adds support to headers_install.sh to munge #if defined(_UAPI_FOO) in
a similar way to the current handling of #ifndef _UAPI_FOO.
Dave Martin (3):
kbuild: install_headers.sh: Strip _UAPI from #if-defined() guards
arm64/sve: ptrace: Fix SVE_PT_REGS_OFFSET definition
arm64/sve: Disentangle <uapi/asm/ptrace.h> from
<uapi/asm/sigcontext.h>
arch/arm64/include/uapi/asm/ptrace.h | 39 ++++++++++-----------
arch/arm64/include/uapi/asm/sigcontext.h | 56 +++++++++++++++----------------
arch/arm64/include/uapi/asm/sve_context.h | 50 +++++++++++++++++++++++++++
scripts/headers_install.sh | 1 +
4 files changed, 97 insertions(+), 49 deletions(-)
create mode 100644 arch/arm64/include/uapi/asm/sve_context.h
--
2.1.4
