linux-kernel - [PATCH v3 3/5] tools: Move x86 syscall number fallbacks to .../uapi/

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Date:   Wed,  1 Sep 2021 13:30:28 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Guo Ren <guoren@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Michael Ellerman <mpe@...erman.id.au>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        Oleg Nesterov <oleg@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Shuah Khan <shuah@...nel.org>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-csky@...r.kernel.org, linux-mips@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, kvm@...r.kernel.org,
        linux-kselftest@...r.kernel.org, Peter Foley <pefoley@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Ben Gardon <bgardon@...gle.com>
Subject: [PATCH v3 3/5] tools: Move x86 syscall number fallbacks to .../uapi/

Move unistd_{32,64}.h from x86/include/asm to x86/include/uapi/asm so
that tools/selftests that install kernel headers, e.g. KVM selftests, can
include non-uapi tools headers, e.g. to get 'struct list_head', without
effectively overriding the installed non-tool uapi headers.

Swapping KVM's search order, e.g. to search the kernel headers before
tool headers, is not a viable option as doing results in linux/type.h and
other core headers getting pulled from the kernel headers, which do not
have the kernel-internal typedefs that are used through tools, including
many files outside of selftests/kvm's control.

Prior to commit cec07f53c398 ("perf tools: Move syscall number fallbacks
from perf-sys.h to tools/arch/x86/include/asm/"), the handcoded numbers
were actual fallbacks, i.e. overriding unistd_{32,64}.h from the kernel
headers was unintentional.

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 tools/arch/x86/include/{ => uapi}/asm/unistd_32.h | 0
 tools/arch/x86/include/{ => uapi}/asm/unistd_64.h | 0
 2 files changed, 0 insertions(+), 0 deletions(-)
 rename tools/arch/x86/include/{ => uapi}/asm/unistd_32.h (100%)
 rename tools/arch/x86/include/{ => uapi}/asm/unistd_64.h (100%)

diff --git a/tools/arch/x86/include/asm/unistd_32.h b/tools/arch/x86/include/uapi/asm/unistd_32.h
similarity index 100%
rename from tools/arch/x86/include/asm/unistd_32.h
rename to tools/arch/x86/include/uapi/asm/unistd_32.h
diff --git a/tools/arch/x86/include/asm/unistd_64.h b/tools/arch/x86/include/uapi/asm/unistd_64.h
similarity index 100%
rename from tools/arch/x86/include/asm/unistd_64.h
rename to tools/arch/x86/include/uapi/asm/unistd_64.h
-- 
2.33.0.153.gba50c8fa24-goog