From: Sam Ravnborg <sam@ravnborg.org>
Date: Tue, 27 Mar 2007 20:50:29 +0000 (+0200)
Subject: kbuild: complain about missing system calls
X-Git-Tag: v2.6.22-rc1~1007^2~21
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c53aeca059c4d2108335810fba6ba89ab6a944dd;p=pandora-kernel.git

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 0451f69353ba..163f8cb020a4 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 @@ $(obj)/$(offsets-file): arch/$(ARCH)/kernel/asm-offsets.s Kbuild
 	$(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)
diff --git a/Makefile b/Makefile
index 92cbc05c31ad..2910c2d5ee9f 100644
--- a/Makefile
+++ b/Makefile
@@ -856,6 +856,7 @@ archprepare: prepare1 scripts_basic
 
 prepare0: archprepare FORCE
 	$(Q)$(MAKE) $(build)=.
+	$(Q)$(MAKE) $(build)=. missing-syscalls
 
 # All the preparing..
 prepare: prepare0
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