[PATCH AUTOSEL 6.14 1/3] kbuild, rust: use -fremap-path-prefix to make paths relative

[PATCH AUTOSEL 6.14 1/3] kbuild, rust: use -fremap-path-prefix to make paths relative

[Sasha Levin]

From: Thomas Weißschuh <linux@weissschuh.net>

[ Upstream commit dbdffaf50ff9cee3259a7cef8a7bd9e0f0ba9f13 ]

Remap source path prefixes in all output, including compiler
diagnostics, debug information, macro expansions, etc.
This removes a few absolute paths from the binary and also makes it
possible to use core::panic::Location properly.

Equivalent to the same configuration done for C sources in
commit 1d3730f0012f ("kbuild: support -fmacro-prefix-map for external
modules") and commit a73619a845d5 ("kbuild: use -fmacro-prefix-map to
make __FILE__ a relative path").

Link: https://doc.rust-lang.org/rustc/command-line-arguments.html#--remap-path-prefix-remap-source-names-in-output
Acked-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Tested-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Makefile b/Makefile
index 8b6764d44a610..c4eeb97ab3df2 100644
--- a/Makefile
+++ b/Makefile
@@ -1068,6 +1068,7 @@ endif
 # change __FILE__ to the relative path to the source directory
 ifdef building_out_of_srctree
 KBUILD_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srcroot)/=)
+KBUILD_RUSTFLAGS += --remap-path-prefix=$(srcroot)/=
 endif
 
 # include additional Makefiles when needed
-- 
2.39.5

[PATCH AUTOSEL 6.14 2/3] kbuild: add dependency from vmlinux to sorttable

[Sasha Levin]

From: Xi Ruoyao <xry111@xry111.site>

[ Upstream commit 82c09de2d4c472ab1b973e6e033671020691e637 ]

Without this dependency it's really puzzling when we bisect for a "bad"
commit in a series of sorttable change: when "git bisect" switches to
another commit, "make" just does nothing to vmlinux.

Signed-off-by: Xi Ruoyao <xry111@xry111.site>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 scripts/Makefile.vmlinux | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/Makefile.vmlinux b/scripts/Makefile.vmlinux
index 873caaa553134..fb79fd6b24654 100644
--- a/scripts/Makefile.vmlinux
+++ b/scripts/Makefile.vmlinux
@@ -79,6 +79,10 @@ ifdef CONFIG_DEBUG_INFO_BTF
 vmlinux: $(RESOLVE_BTFIDS)
 endif
 
+ifdef CONFIG_BUILDTIME_TABLE_SORT
+vmlinux: scripts/sorttable
+endif
+
 # module.builtin.ranges
 # ---------------------------------------------------------------------------
 ifdef CONFIG_BUILTIN_MODULE_RANGES
-- 
2.39.5

[PATCH AUTOSEL 6.14 3/3] sched/isolation: Make CONFIG_CPU_ISOLATION depend on CONFIG_SMP

[Sasha Levin]

From: Oleg Nesterov <oleg@redhat.com>

[ Upstream commit 975776841e689dd8ba36df9fa72ac3eca3c2957a ]

kernel/sched/isolation.c obviously makes no sense without CONFIG_SMP, but
the Kconfig entry we have right now:

	config CPU_ISOLATION
		bool "CPU isolation"
		depends on SMP || COMPILE_TEST

allows the creation of pointless .config's which cause
build failures.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250330134955.GA7910@redhat.com

Closes: https://lore.kernel.org/oe-kbuild-all/202503260646.lrUqD3j5-lkp@intel.com/
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 init/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/init/Kconfig b/init/Kconfig
index 324c2886b2ea3..a39fe292a0457 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -706,7 +706,7 @@ endmenu # "CPU/Task time and stats accounting"
 
 config CPU_ISOLATION
 	bool "CPU isolation"
-	depends on SMP || COMPILE_TEST
+	depends on SMP
 	default y
 	help
 	  Make sure that CPUs running critical tasks are not disturbed by
-- 
2.39.5