user/sven/linux.git/scripts, branch v4.14.94

x86, modpost: Replace last remnants of RETPOLINE with CONFIG_RETPOLINE

2019-01-16T21:07:10Z

commit e4f358916d528d479c3c12bd2fd03f2d5a576380 upstream. Commit 4cd24de3a098 ("x86/retpoline: Make CONFIG_RETPOLINE depend on compiler support") replaced the RETPOLINE define with CONFIG_RETPOLINE checks. Remove the remaining pieces. [ bp: Massage commit message. ] Fixes: 4cd24de3a098 ("x86/retpoline: Make CONFIG_RETPOLINE depend on compiler support") Signed-off-by: WANG Chao Signed-off-by: Borislav Petkov Reviewed-by: Zhenzhong Duan Reviewed-by: Masahiro Yamada Cc: "H. Peter Anvin" Cc: Andi Kleen Cc: Andrew Morton Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Daniel Borkmann Cc: David Woodhouse Cc: Geert Uytterhoeven Cc: Jessica Yu Cc: Jiri Kosina Cc: Kees Cook Cc: Konrad Rzeszutek Wilk Cc: Luc Van Oostenryck Cc: Michal Marek Cc: Miguel Ojeda Cc: Peter Zijlstra Cc: Tim Chen Cc: Vasily Gorbik Cc: linux-kbuild@vger.kernel.org Cc: srinivas.eeda@oracle.com Cc: stable Cc: x86-ml Link: https://lkml.kernel.org/r/20181210163725.95977-1-chao.wang@ucloud.cn Signed-off-by: Greg Kroah-Hartman

scripts/kallsyms: filter arm64's __efistub_ symbols

2019-01-13T09:01:06Z

commit 1212f7a16af492d59304ba3abccbcc5b5e41423e upstream. On arm64, the EFI stub and the kernel proper are essentially the same binary, although the EFI stub executes at a different virtual address as the kernel. For this reason, the EFI stub is restricted in the symbols it can link to, which is ensured by prefixing all EFI stub symbols with __efistub_ (and emitting __efistub_ prefixed aliases for routines that may be shared between the core kernel and the stub) These symbols are leaking into kallsyms, polluting the namespace, so let's filter them explicitly. Signed-off-by: Ard Biesheuvel Signed-off-by: Will Deacon Cc: Nick Desaulniers Signed-off-by: Greg Kroah-Hartman

ftrace: Build with CPPFLAGS to get -Qunused-arguments

2019-01-13T09:01:03Z

When building to record the mcount locations the kernel uses KBUILD_CFLAGS but not KBUILD_CPPFLAGS. This means it lacks -Qunused-arguments when building with clang, resulting in a lot of noisy warnings. Signed-off-by: Joel Stanley Reviewed-by: Nick Desaulniers Signed-off-by: Masahiro Yamada [nc: Fix conflicts due to lack of 87a32e624037 and d503ac531a52] Signed-off-by: Nathan Chancellor Signed-off-by: Greg Kroah-Hartman

checkstack.pl: fix for aarch64

2019-01-13T09:00:57Z

[ Upstream commit f1733a1d3cd32a9492f4cf866be37bb46e10163d ] There is actually a space after "sp," like this, ffff2000080813c8: a9bb7bfd stp x29, x30, [sp, #-80]! Right now, checkstack.pl isn't able to print anything on aarch64, because it won't be able to match the stating objdump line of a function due to this missing space. Hence, it displays every stack as zero-size. After this patch, checkpatch.pl is able to match the start of a function's objdump, and is then able to calculate each function's stack correctly. Link: http://lkml.kernel.org/r/20181207195843.38528-1-cai@lca.pw Signed-off-by: Qian Cai Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin

unifdef: use memcpy instead of strncpy

2018-12-08T12:03:35Z

commit 38c7b224ce22c25fed04007839edf974bd13439d upstream. New versions of gcc reasonably warn about the odd pattern of strncpy(p, q, strlen(q)); which really doesn't make sense: the strncpy() ends up being just a slow and odd way to write memcpy() in this case. There was a comment about _why_ the code used strncpy - to avoid the terminating NUL byte, but memcpy does the same and avoids the warning. Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman

Kbuild: suppress packed-not-aligned warning for default setting only

2018-12-08T12:03:34Z

commit 321cb0308a9e76841394b4bbab6a1107cfedbae0 upstream. gcc-8 reports many -Wpacked-not-aligned warnings. The below are some examples. ./include/linux/ceph/msgr.h:67:1: warning: alignment 1 of 'struct ceph_entity_addr' is less than 8 [-Wpacked-not-aligned] } __attribute__ ((packed)); ./include/linux/ceph/msgr.h:67:1: warning: alignment 1 of 'struct ceph_entity_addr' is less than 8 [-Wpacked-not-aligned] } __attribute__ ((packed)); ./include/linux/ceph/msgr.h:67:1: warning: alignment 1 of 'struct ceph_entity_addr' is less than 8 [-Wpacked-not-aligned] } __attribute__ ((packed)); This patch suppresses this kind of warnings for default setting. Signed-off-by: Xiongfeng Wang Signed-off-by: Masahiro Yamada Signed-off-by: Greg Kroah-Hartman

x86/retpoline: Make CONFIG_RETPOLINE depend on compiler support

2018-12-05T18:41:19Z

commit 4cd24de3a0980bf3100c9dcb08ef65ca7c31af48 upstream Since retpoline capable compilers are widely available, make CONFIG_RETPOLINE hard depend on the compiler capability. Break the build when CONFIG_RETPOLINE is enabled and the compiler does not support it. Emit an error message in that case: "arch/x86/Makefile:226: *** You are building kernel with non-retpoline compiler, please update your compiler.. Stop." [dwmw: Fail the build with non-retpoline compiler] Suggested-by: Peter Zijlstra Signed-off-by: Zhenzhong Duan Signed-off-by: Thomas Gleixner Cc: David Woodhouse Cc: Borislav Petkov Cc: Daniel Borkmann Cc: H. Peter Anvin Cc: Konrad Rzeszutek Wilk Cc: Andy Lutomirski Cc: Masahiro Yamada Cc: Michal Marek Cc: Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/cca0cb20-f9e2-4094-840b-fb0f8810cd34@default Signed-off-by: Greg Kroah-Hartman

kconfig: fix the rule of mainmenu_stmt symbol

2018-11-04T13:52:45Z

[ Upstream commit 56869d45e364244a721de34ce9c5dc9ed022779e ] The rule of mainmenu_stmt does not have debug print of zconf_lineno(), but if it had, it would print a wrong line number for the same reason as commit b2d00d7c61c8 ("kconfig: fix line numbers for if-entries in menu tree"). The mainmenu_stmt does not need to eat following empty lines because they are reduced to common_stmt. Signed-off-by: Masahiro Yamada Signed-off-by: Sasha Levin

kbuild: add .DELETE_ON_ERROR special target

2018-09-26T06:37:59Z

[ Upstream commit 9c2af1c7377a8a6ef86e5cabf80978f3dbbb25c0 ] If Make gets a fatal signal while a shell is executing, it may delete the target file that the recipe was supposed to update. This is needed to make sure that it is remade from scratch when Make is next run; if Make is interrupted after the recipe has begun to write the target file, it results in an incomplete file whose time stamp is newer than that of the prerequisites files. Make automatically deletes the incomplete file on interrupt unless the target is marked .PRECIOUS. The situation is just the same as when the shell fails for some reasons. Usually when a recipe line fails, if it has changed the target file at all, the file is corrupted, or at least it is not completely updated. Yet the file’s time stamp says that it is now up to date, so the next time Make runs, it will not try to update that file. However, Make does not cater to delete the incomplete target file in this case. We need to add .DELETE_ON_ERROR somewhere in the Makefile to request it. scripts/Kbuild.include seems a suitable place to add it because it is included from almost all sub-makes. Please note .DELETE_ON_ERROR is not effective for phony targets. The external module building should never ever touch the kernel tree. The following recipe fails if include/generated/autoconf.h is missing. However, include/config/auto.conf is not deleted since it is a phony target. PHONY += include/config/auto.conf include/config/auto.conf: $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ echo >&2; \ echo >&2 " ERROR: Kernel configuration is invalid."; \ echo >&2 " include/generated/autoconf.h or $@ are missing.";\ echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ echo >&2 ; \ /bin/false) Signed-off-by: Masahiro Yamada Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

kbuild: make missing $DEPMOD a Warning instead of an Error

2018-09-15T07:45:36Z

commit 914b087ff9e0e9a399a4927fa30793064afc0178 upstream. When $DEPMOD is not found, only print a warning instead of exiting with an error message and error status: Warning: 'make modules_install' requires /sbin/depmod. Please install it. This is probably in the kmod package. Change the Error to a Warning because "not all build hosts for cross compiling Linux are Linux systems and are able to provide a working port of depmod, especially at the file patch /sbin/depmod." I.e., "make modules_install" may be used to copy/install the loadable modules files to a target directory on a build system and then transferred to an embedded device where /sbin/depmod is run instead of it being run on the build system. Fixes: 934193a654c1 ("kbuild: verify that $DEPMOD is installed") Signed-off-by: Randy Dunlap Reported-by: H. Nikolaus Schaller Cc: stable@vger.kernel.org Cc: Lucas De Marchi Cc: Lucas De Marchi Cc: Michal Marek Cc: Jessica Yu Cc: Chih-Wei Huang Signed-off-by: Masahiro Yamada Signed-off-by: Maxim Zhukov Signed-off-by: Greg Kroah-Hartman