kbuild: complain about missing system calls
Most system calls seems to get added to i386 first. This patch
automatically generates a warning for any new system call which is
implemented on i386 but not the architecture currently being compiled.
On PowerPC at the moment, for example, it results in these warnings:
init/missing_syscalls.h:935:3: warning: #warning syscall sync_file_range not implemented
init/missing_syscalls.h:947:3: warning: #warning syscall getcpu not implemented
init/missing_syscalls.h:950:3: warning: #warning syscall epoll_pwait not implemented
The file scripts/checksyscalls.sh list a number of legacy system calls
that are ignored because they only makes sense on i386 systems.
Other contributors to this patch are Russell King <rmk+lkml@arm.linux.org.uk>
and Stéphane Jourdois <kwisatz@rubis.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/Kbuild b/Kbuild
index 0451f69..163f8cb 100644
--- a/Kbuild
+++ b/Kbuild
@@ -2,6 +2,7 @@
# Kbuild for top-level directory of the kernel
# This file takes care of the following:
# 1) Generate asm-offsets.h
+# 2) Check for missing system calls
#####
# 1) Generate asm-offsets.h
@@ -46,3 +47,13 @@
$(Q)mkdir -p $(dir $@)
$(call cmd,offsets)
+#####
+# 2) Check for missing system calls
+#
+
+quiet_cmd_syscalls = CALL $<
+ cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags)
+
+PHONY += missing-syscalls
+missing-syscalls: scripts/checksyscalls.sh FORCE
+ $(call cmd,syscalls)