Commit-ID: bc53d3d777f81385c1bb08b07bd1c06450ecc2c1
Gitweb: https://git.kernel.org/tip/bc53d3d777f81385c1bb08b07bd1c06450ecc2c1
Author: Masahiro Yamada <yamada.masah...@socionext.com>
AuthorDate: Tue, 25 Jun 2019 16:26:22 +0900
Committer: Thomas Gleixner <t...@linutronix.de>
CommitDate: Tue, 25 Jun 2019 09:52:05 +0200
x86/build: Add 'set -e' to mkcapflags.sh to delete broken capflags.c
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 9c2af1c7377a ("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: Masahiro Yamada <yamada.masah...@socionext.com>
Signed-off-by: Thomas Gleixner <t...@linutronix.de>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Borislav Petkov <b...@alien8.de>
Link:
https://lkml.kernel.org/r/20190625072622.17679-1-yamada.masah...@socionext.com
---
arch/x86/kernel/cpu/mkcapflags.sh | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/kernel/cpu/mkcapflags.sh
b/arch/x86/kernel/cpu/mkcapflags.sh
index d0dfb892c72f..aed45b8895d5 100644
--- a/arch/x86/kernel/cpu/mkcapflags.sh
+++ b/arch/x86/kernel/cpu/mkcapflags.sh
@@ -4,6 +4,8 @@
# Generate the x86_cap/bug_flags[] arrays from include/asm/cpufeatures.h
#
+set -e
+
IN=$1
OUT=$2
