linux-kernel - [PATCH v2] uml: fix W=1 missing-include-dirs warnings

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Date:   Thu, 15 Apr 2021 10:13:52 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        linux-kbuild@...r.kernel.org, Jeff Dike <jdike@...toit.com>,
        Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        linux-um@...ts.infradead.org
Subject: [PATCH v2] uml: fix W=1 missing-include-dirs warnings

Currently when using "W=1" with UML builds, there are over 700 warnings
like so:

  CC      arch/um/drivers/stderr_console.o
cc1: warning: ./arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs]

but arch/um/ does not have include/uapi/ at all, so add that
subdir and put one Kbuild file into it (since git does not track
empty subdirs).

Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Masahiro Yamada <masahiroy@...nel.org>
Cc: Michal Marek <michal.lkml@...kovi.net>
Cc: linux-kbuild@...r.kernel.org
Cc: Jeff Dike <jdike@...toit.com>
Cc: Richard Weinberger <richard@....at>
Cc: Anton Ivanov <anton.ivanov@...bridgegreys.com>
Cc: linux-um@...ts.infradead.org
---
v2: use Option 4 from v1: add arch/um/include/uapi so that 'make' is
    placated -- and just like all other arch's have.

 arch/um/include/uapi/asm/Kbuild |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/um/include/uapi/asm/Kbuild b/arch/um/include/uapi/asm/Kbuild
new file mode 100644
index 000000000000..f66554cd5c45
--- /dev/null
+++ b/arch/um/include/uapi/asm/Kbuild
@@ -0,0 +1 @@
+# SPDX-License-Identifier: GPL-2.0