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>
---
 Kbuild             | 4 ++--
 arch/mips/Makefile | 6 ++----
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/Kbuild b/Kbuild
index 515cc6a27477..fb547bc5ff41 100644
--- a/Kbuild
+++ b/Kbuild
@@ -47,11 +47,11 @@ $(rq-offsets-file): kernel/sched/rq-offsets.s FORCE
 
 # Check for missing system calls
 
-missing-syscalls-file := .tmp_missing-syscalls
+missing-syscalls-file := .tmp_missing-syscalls$(missing_syscalls_instance)
 
 targets += $(missing-syscalls-file)
 
-quiet_cmd_syscalls = CALL    $<
+quiet_cmd_syscalls = CALL    $< $(if $(missing_syscalls_instance),for $(missing_syscalls_instance))
       cmd_syscalls = DEPFILE=$(depfile) $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags); touch $@
 
 $(missing-syscalls-file): scripts/checksyscalls.sh $(rq-offsets-file) FORCE
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index d9057e29bc62..6705fa5d9211 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -421,12 +421,10 @@ CLEAN_FILES += vmlinux.32 vmlinux.64
 
 archprepare:
 ifdef CONFIG_MIPS32_N32
-	@$(kecho) '  Checking missing-syscalls for N32'
-	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
+	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_instance="N32" missing_syscalls_flags="-mabi=n32"
 endif
 ifdef CONFIG_MIPS32_O32
-	@$(kecho) '  Checking missing-syscalls for O32'
-	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
+	$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_instance="O32" missing_syscalls_flags="-mabi=32"
 endif
 
 install:

-- 
2.53.0

On Tue, 24 Mar 2026 18:16:47 +0100, Thomas Weißschuh <linux@weissschuh.net> wrote:
> diff --git a/Kbuild b/Kbuild
> index 515cc6a27477..fb547bc5ff41 100644
> --- a/Kbuild
> +++ b/Kbuild
> @@ -47,11 +47,11 @@ $(rq-offsets-file): kernel/sched/rq-offsets.s FORCE
>  
>  # Check for missing system calls
>  
> -missing-syscalls-file := .tmp_missing-syscalls
> +missing-syscalls-file := .tmp_missing-syscalls$(missing_syscalls_instance)
>  
>  targets += $(missing-syscalls-file)
>  
> -quiet_cmd_syscalls = CALL    $<
> +quiet_cmd_syscalls = CALL    $< $(if $(missing_syscalls_instance),for $(missing_syscalls_instance))

Nice solution!

$(addprefix) shortens a bit here:

quiet_cmd_syscalls = CALL    $< $(addprefix for ,$(missing_syscalls_instance))

-- 
Nicolas