From: Masahiro Yamada Date: Tue, 25 Jun 2019 07:26:22 +0000 (+0900) Subject: x86/build: Add 'set -e' to mkcapflags.sh to delete broken capflags.c X-Git-Tag: v4.9.187~171 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=54ed2617c3590e2d5d4763f9e1282b2c2766feb2;p=platform%2Fkernel%2Flinux-amlogic.git x86/build: Add 'set -e' to mkcapflags.sh to delete broken capflags.c [ Upstream commit bc53d3d777f81385c1bb08b07bd1c06450ecc2c1 ] 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 Signed-off-by: Thomas Gleixner Cc: "H. Peter Anvin" Cc: Borislav Petkov Link: https://lkml.kernel.org/r/20190625072622.17679-1-yamada.masahiro@socionext.com Signed-off-by: Sasha Levin --- diff --git a/arch/x86/kernel/cpu/mkcapflags.sh b/arch/x86/kernel/cpu/mkcapflags.sh index 6988c74..711b74e 100644 --- a/arch/x86/kernel/cpu/mkcapflags.sh +++ b/arch/x86/kernel/cpu/mkcapflags.sh @@ -3,6 +3,8 @@ # Generate the x86_cap/bug_flags[] arrays from include/asm/cpufeatures.h # +set -e + IN=$1 OUT=$2