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On MIPS the checksyscalls.sh script may be executed multiple times. Currently these multiple executions are executed on each build as kbuild see that the commands have changed each time. Use a dedicated stamp file for each different invocation to avoid the spurious executions. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Nicolas Schier <nsc@kernel.org> Link: https://patch.msgid.link/20260402-kbuild-missing-syscalls-v3-3-6641be1de2db@weissschuh.net Signed-off-by: Nicolas Schier <nsc@kernel.org>
118 lines
3.1 KiB
Makefile
118 lines
3.1 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Kbuild for top-level directory of the kernel
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# Prepare global headers and check sanity before descending into sub-directories
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# ---------------------------------------------------------------------------
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# Generate bounds.h
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bounds-file := include/generated/bounds.h
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targets := kernel/bounds.s
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$(bounds-file): kernel/bounds.s FORCE
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$(call filechk,offsets,__LINUX_BOUNDS_H__)
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# Generate timeconst.h
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timeconst-file := include/generated/timeconst.h
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filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $<
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$(timeconst-file): kernel/time/timeconst.bc FORCE
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$(call filechk,gentimeconst)
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# Generate asm-offsets.h
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offsets-file := include/generated/asm-offsets.h
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targets += arch/$(SRCARCH)/kernel/asm-offsets.s
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arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file)
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$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
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$(call filechk,offsets,__ASM_OFFSETS_H__)
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# Generate rq-offsets.h
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rq-offsets-file := include/generated/rq-offsets.h
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targets += kernel/sched/rq-offsets.s
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kernel/sched/rq-offsets.s: $(offsets-file)
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$(rq-offsets-file): kernel/sched/rq-offsets.s FORCE
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$(call filechk,offsets,__RQ_OFFSETS_H__)
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# Check for missing system calls
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missing-syscalls-file := .tmp_missing-syscalls$(missing_syscalls_instance)
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targets += $(missing-syscalls-file)
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quiet_cmd_syscalls = CALL $< $(addprefix for ,$(missing_syscalls_instance))
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cmd_syscalls = DEPFILE=$(depfile) $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags); touch $@
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$(missing-syscalls-file): scripts/checksyscalls.sh $(rq-offsets-file) FORCE
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$(call if_changed_dep,syscalls)
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PHONY += missing-syscalls
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missing-syscalls: $(missing-syscalls-file)
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# Check the manual modification of atomic headers
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quiet_cmd_check_sha1 = CHKSHA1 $<
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cmd_check_sha1 = \
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if ! command -v sha1sum >/dev/null; then \
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echo "warning: cannot check the header due to sha1sum missing"; \
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exit 0; \
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fi; \
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if [ "$$(sed -n '$$s:// ::p' $<)" != \
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"$$(sed '$$d' $< | sha1sum | sed 's/ .*//')" ]; then \
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echo "error: $< has been modified." >&2; \
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exit 1; \
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fi; \
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touch $@
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atomic-checks += $(addprefix $(obj)/.checked-, \
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atomic-arch-fallback.h \
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atomic-instrumented.h \
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atomic-long.h)
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targets += $(atomic-checks)
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$(atomic-checks): $(obj)/.checked-%: include/linux/atomic/% FORCE
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$(call if_changed,check_sha1)
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# A phony target that depends on all the preparation targets
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PHONY += prepare
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prepare: $(offsets-file) missing-syscalls $(atomic-checks)
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@:
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# Ordinary directory descending
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# ---------------------------------------------------------------------------
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obj-y += init/
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obj-y += usr/
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obj-y += arch/$(SRCARCH)/
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obj-y += $(ARCH_CORE)
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obj-y += kernel/
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obj-y += certs/
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obj-y += mm/
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obj-y += fs/
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obj-y += ipc/
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obj-y += security/
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obj-y += crypto/
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obj-$(CONFIG_BLOCK) += block/
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obj-$(CONFIG_IO_URING) += io_uring/
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obj-$(CONFIG_RUST) += rust/
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obj-y += $(ARCH_LIB)
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obj-y += drivers/
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obj-y += sound/
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obj-$(CONFIG_SAMPLES) += samples/
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obj-$(CONFIG_NET) += net/
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obj-y += virt/
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obj-y += $(ARCH_DRIVERS)
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obj-$(CONFIG_DRM_HEADER_TEST) += include/
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