6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Miguel Ojeda <ojeda@xxxxxxxxxx> [ Upstream commit df01b7cfcef08bf3fdcac2909d0e1910781d6bfd ] `rustc` outputs by default the temporary files (i.e. the ones saved by `-Csave-temps`, such as `*.rcgu*` files) in the current working directory when `-o` and `--out-dir` are not given (even if `--emit=x=path` is given, i.e. it does not use those for temporaries). Since out-of-tree modules are compiled from the `linux` tree, `rustc` then tries to create them there, which may not be accessible. Thus pass `--out-dir` explicitly, even if it is just for the temporary files. Similarly, do so for Rust host programs too. Reported-by: Raphael Nestler <raphael.nestler@xxxxxxxxx> Closes: https://github.com/Rust-for-Linux/linux/issues/1015 Reported-by: Andrea Righi <andrea.righi@xxxxxxxxxxxxx> Tested-by: Raphael Nestler <raphael.nestler@xxxxxxxxx> # non-hostprogs Tested-by: Andrea Righi <andrea.righi@xxxxxxxxxxxxx> # non-hostprogs Fixes: 295d8398c67e ("kbuild: specify output names separately for each emission type from rustc") Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Miguel Ojeda <ojeda@xxxxxxxxxx> Tested-by: Martin Rodriguez Reboredo <yakoyoku@xxxxxxxxx> Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- scripts/Makefile.build | 5 ++++- scripts/Makefile.host | 6 +++++- 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 9ae02542b9389..1827bc1db1e98 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -277,6 +277,9 @@ $(obj)/%.lst: $(src)/%.c FORCE rust_allowed_features := core_ffi_c +# `--out-dir` is required to avoid temporaries being created by `rustc` in the +# current working directory, which may be not accessible in the out-of-tree +# modules case. rust_common_cmd = \ RUST_MODFILE=$(modfile) $(RUSTC_OR_CLIPPY) $(rust_flags) \ -Zallow-features=$(rust_allowed_features) \ @@ -285,7 +288,7 @@ rust_common_cmd = \ --extern alloc --extern kernel \ --crate-type rlib -L $(objtree)/rust/ \ --crate-name $(basename $(notdir $@)) \ - --emit=dep-info=$(depfile) + --out-dir $(dir $@) --emit=dep-info=$(depfile) rust_handle_depfile = \ sed -i '/^\#/d' $(depfile) diff --git a/scripts/Makefile.host b/scripts/Makefile.host index d812241144d44..a447c91893de6 100644 --- a/scripts/Makefile.host +++ b/scripts/Makefile.host @@ -86,7 +86,11 @@ hostc_flags = -Wp,-MMD,$(depfile) \ hostcxx_flags = -Wp,-MMD,$(depfile) \ $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \ $(HOSTCXXFLAGS_$(target-stem).o) -hostrust_flags = --emit=dep-info=$(depfile) \ + +# `--out-dir` is required to avoid temporaries being created by `rustc` in the +# current working directory, which may be not accessible in the out-of-tree +# modules case. +hostrust_flags = --out-dir $(dir $@) --emit=dep-info=$(depfile) \ $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \ $(HOSTRUSTFLAGS_$(target-stem)) -- 2.43.0
