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b1992c3772
Kbuild conventionally uses $(obj)/ for generated files, and $(src)/ for
checked-in source files. It is merely a convention without any functional
difference. In fact, $(obj) and $(src) are exactly the same, as defined
in scripts/Makefile.build:
src := $(obj)
When the kernel is built in a separate output directory, $(src) does
not accurately reflect the source directory location. While Kbuild
resolves this discrepancy by specifying VPATH=$(srctree) to search for
source files, it does not cover all cases. For example, when adding a
header search path for local headers, -I$(srctree)/$(src) is typically
passed to the compiler.
This introduces inconsistency between upstream and downstream Makefiles
because $(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 following
meanings:
$(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 tree
Consequently, $(srctree)/$(src) in upstream Makefiles need to be replaced
with $(src).
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
71 lines
2.3 KiB
Makefile
71 lines
2.3 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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# Kernel does not boot with instrumentation of tlb.c and mem_encrypt*.c
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KCOV_INSTRUMENT_tlb.o := n
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KCOV_INSTRUMENT_mem_encrypt.o := n
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KCOV_INSTRUMENT_mem_encrypt_amd.o := n
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KCOV_INSTRUMENT_mem_encrypt_identity.o := n
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KCOV_INSTRUMENT_pgprot.o := n
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KASAN_SANITIZE_mem_encrypt.o := n
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KASAN_SANITIZE_mem_encrypt_amd.o := n
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KASAN_SANITIZE_mem_encrypt_identity.o := n
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KASAN_SANITIZE_pgprot.o := n
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# Disable KCSAN entirely, because otherwise we get warnings that some functions
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# reference __initdata sections.
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KCSAN_SANITIZE := n
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# Avoid recursion by not calling KMSAN hooks for CEA code.
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KMSAN_SANITIZE_cpu_entry_area.o := n
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KMSAN_SANITIZE_mem_encrypt_identity.o := n
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ifdef CONFIG_FUNCTION_TRACER
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CFLAGS_REMOVE_mem_encrypt.o = -pg
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CFLAGS_REMOVE_mem_encrypt_amd.o = -pg
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CFLAGS_REMOVE_mem_encrypt_identity.o = -pg
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CFLAGS_REMOVE_pgprot.o = -pg
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endif
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obj-y := init.o init_$(BITS).o fault.o ioremap.o extable.o mmap.o \
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pgtable.o physaddr.o tlb.o cpu_entry_area.o maccess.o pgprot.o
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obj-y += pat/
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# Make sure __phys_addr has no stackprotector
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CFLAGS_physaddr.o := -fno-stack-protector
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CFLAGS_mem_encrypt_identity.o := -fno-stack-protector
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CFLAGS_fault.o := -I $(src)/../include/asm/trace
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obj-$(CONFIG_X86_32) += pgtable_32.o iomap_32.o
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obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
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obj-$(CONFIG_PTDUMP_CORE) += dump_pagetables.o
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obj-$(CONFIG_PTDUMP_DEBUGFS) += debug_pagetables.o
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obj-$(CONFIG_HIGHMEM) += highmem_32.o
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KASAN_SANITIZE_kasan_init_$(BITS).o := n
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obj-$(CONFIG_KASAN) += kasan_init_$(BITS).o
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KMSAN_SANITIZE_kmsan_shadow.o := n
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obj-$(CONFIG_KMSAN) += kmsan_shadow.o
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obj-$(CONFIG_MMIOTRACE) += mmiotrace.o
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mmiotrace-y := kmmio.o pf_in.o mmio-mod.o
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obj-$(CONFIG_MMIOTRACE_TEST) += testmmiotrace.o
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obj-$(CONFIG_NUMA) += numa.o numa_$(BITS).o
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obj-$(CONFIG_AMD_NUMA) += amdtopology.o
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obj-$(CONFIG_ACPI_NUMA) += srat.o
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obj-$(CONFIG_NUMA_EMU) += numa_emulation.o
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obj-$(CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS) += pkeys.o
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obj-$(CONFIG_RANDOMIZE_MEMORY) += kaslr.o
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obj-$(CONFIG_MITIGATION_PAGE_TABLE_ISOLATION) += pti.o
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obj-$(CONFIG_X86_MEM_ENCRYPT) += mem_encrypt.o
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obj-$(CONFIG_AMD_MEM_ENCRYPT) += mem_encrypt_amd.o
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obj-$(CONFIG_AMD_MEM_ENCRYPT) += mem_encrypt_identity.o
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obj-$(CONFIG_AMD_MEM_ENCRYPT) += mem_encrypt_boot.o
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