Changes in Makefile

a79be02b - Fix mis-uses of 'cc-option' for warning disablement

Wed, 23 Apr 2025 17:08:29 +0000

Fix mis-uses of 'cc-option' for warning disablementThis was triggered by one of my mis-uses causing odd build warnings onsparc in linux-next, but while figuring out why the "obviously correct"use of cc-option caused such odd breakage, I found eight other cases ofthe same thing in the tree.The root cause is that 'cc-option' doesn't work for checking negativewarning options (ie things like '-Wno-stringop-overflow') because gccwill silently accept options it doesn't recognize, and so 'cc-option'ends up thinking they are perfectly fine.And it all works, until you have a situation where _another_ warning isemitted. At that point the compiler will go "Hmm, maybe the userintended to disable this warning but used that wrong option that Ididn't recognize", and generate a warning for the unrecognized negativeoption.Which explains why we have several cases of this in the tree: the'cc-option' test really doesn't work for this situation, but most of thetime it simply doesn't matter that ity doesn't work.The reason my recently added case caused problems on sparc was pointedout by Thomas Weißschuh: the sparc build had a previous explicit warningthat then triggered the new one.I think the best fix for this would be to make 'cc-option' a bit smarterabout this sitation, possibly by adding an intentional warning to thetest case that then triggers the unrecognized option warning reliably.But the short-term fix is to replace 'cc-option' with an existing helperdesigned for this exact case: 'cc-disable-warning', which picks thenegative warning but uses the positive form for testing the compilersupport.Reported-by: Stephen Rothwell Link: https://lore.kernel.org/all/20250422204718.0b4e3f81@canb.auug.org.au/Explained-by: Thomas Weißschuh Signed-off-by: Linus Torvalds List of files: /linux-6.15/arch/loongarch/kvm/Makefile

1c405b42 - LoongArch: KVM: Remove unnecessary header include path

Tue, 18 Mar 2025 08:48:08 +0000

LoongArch: KVM: Remove unnecessary header include patharch/loongarch/kvm/ includes local headers with the double-quote form(#include "..."). Also, TRACE_INCLUDE_PATH in arch/loongarch/kvm/trace.his relative to include/trace/.Hence, the local header search path is unneeded.Reviewed-by: Bibo Mao Signed-off-by: Masahiro Yamada Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/kvm/Makefile

1928254c - LoongArch: KVM: Add irqfd support

Wed, 13 Nov 2024 08:18:27 +0000

LoongArch: KVM: Add irqfd supportEnable the KVM_IRQ_ROUTING/KVM_IRQCHIP/KVM_MSI configuration items,add the KVM_CAP_IRQCHIP capability, and implement the query interfaceof the in-kernel irqchip.Signed-off-by: Xianglai Li Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/kvm/Makefile

e785dfac - LoongArch: KVM: Add PCHPIC device support

Wed, 13 Nov 2024 08:18:27 +0000

LoongArch: KVM: Add PCHPIC device supportAdd device model for PCHPIC interrupt controller, implemente basiccreate & destroy interface, and register device model to kvm devicetable.Signed-off-by: Tianrui Zhao Signed-off-by: Xianglai Li Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/kvm/Makefile

2e8b9df8 - LoongArch: KVM: Add EIOINTC device support

Wed, 13 Nov 2024 08:18:27 +0000

LoongArch: KVM: Add EIOINTC device supportAdd device model for EIOINTC interrupt controller, implement basiccreate & destroy interfaces, and register device model to kvm devicetable.Signed-off-by: Tianrui Zhao Signed-off-by: Xianglai Li Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/kvm/Makefile

c532de5a - LoongArch: KVM: Add IPI device support

Wed, 13 Nov 2024 08:18:27 +0000

LoongArch: KVM: Add IPI device supportAdd device model for IPI interrupt controller, implement basic create &destroy interfaces, and register device model to kvm device table.Signed-off-by: Tianrui Zhao Signed-off-by: Xianglai Li Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/kvm/Makefile

b1992c37 - kbuild: use $(src) instead of $(srctree)/$(src) for source directory

Sat, 27 Apr 2024 14:55:02 +0000

kbuild: use $(src) instead of $(srctree)/$(src) for source directoryKbuild conventionally uses $(obj)/ for generated files, and $(src)/ forchecked-in source files. It is merely a convention without any functionaldifference. In fact, $(obj) and $(src) are exactly the same, as definedin scripts/Makefile.build: src := $(obj)When the kernel is built in a separate output directory, $(src) doesnot accurately reflect the source directory location. While Kbuildresolves this discrepancy by specifying VPATH=$(srctree) to search forsource files, it does not cover all cases. For example, when adding aheader search path for local headers, -I$(srctree)/$(src) is typicallypassed to the compiler.This introduces inconsistency between upstream and downstream Makefilesbecause $(src) is used instead of $(srctree)/$(src) for the latter.To address this inconsistency, this commit changes the semantics of$(src) so that it always points to the directory in the source tree.Going forward, the variables used in Makefiles will have the followingmeanings: $(obj) - directory in the object tree $(src) - directory in the source tree (changed by this commit) $(objtree) - the top of the kernel object tree $(srctree) - the top of the kernel source treeConsequently, $(srctree)/$(src) in upstream Makefiles need to be replacedwith $(src).Signed-off-by: Masahiro Yamada Reviewed-by: Nicolas Schier List of files: /linux-6.15/arch/loongarch/kvm/Makefile

c1fc48aa - LoongArch: KVM: Enable kvm config and add the makefile

Mon, 02 Oct 2023 02:01:29 +0000

LoongArch: KVM: Enable kvm config and add the makefileEnable LoongArch kvm config and add the makefile to support build kvmmodule.Reviewed-by: Bibo Mao Tested-by: Huacai Chen Signed-off-by: Tianrui Zhao Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/kvm/Makefile