Commit 03357788 authored by Masahiro Yamada's avatar Masahiro Yamada Committed by Greg Kroah-Hartman

x86/build: Add 'set -e' to mkcapflags.sh to delete broken capflags.c

[ Upstream commit bc53d3d7 ]

Without 'set -e', shell scripts continue running even after any
error occurs. The missed 'set -e' is a typical bug in shell scripting.

For example, when a disk space shortage occurs while this script is
running, it actually ends up with generating a truncated capflags.c.

Yet, mkcapflags.sh continues running and exits with 0. So, the build
system assumes it has succeeded.

It will not be re-generated in the next invocation of Make since its
timestamp is newer than that of any of the source files.

Add 'set -e' so that any error in this script is caught and propagated
to the build system.

Since 9c2af1c7 ("kbuild: add .DELETE_ON_ERROR special target"),
make automatically deletes the target on any failure. So, the broken
capflags.c will be deleted automatically.
Signed-off-by: default avatarMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Borislav Petkov <bp@alien8.de>
Link: https://lkml.kernel.org/r/20190625072622.17679-1-yamada.masahiro@socionext.comSigned-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 3f7952b2
......@@ -4,6 +4,8 @@
# Generate the x86_cap/bug_flags[] arrays from include/asm/cpufeatures.h
#
set -e
IN=$1
OUT=$2
......
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