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authorBorislav Petkov <bp@suse.de>2014-12-09 16:45:17 +0100
committerIngo Molnar <mingo@kernel.org>2014-12-11 11:43:56 +0100
commit5de2b61a63f0982641eb00b9a6a9650f23487eaa (patch)
treef1361a739a91552a6a77dbe761bc43533b6783ed /arch/x86/kernel/asm-offsets_64.c
parentf647d7c155f069c1a068030255c300663516420e (diff)
x86/asm: Guard against building the 32/64-bit versions of the asm-offsets*.c file directly
Sometimes it is helpful to build a kernel compilation unit directly, i.e.: make .../<filename>.i in order to look at compiler output. Since asm-offsets_{32,64}.c are included by asm-offsets.c and building them directly doesn't evaluate the macros used (thus making the preprocessor output not very useful), error out when an attempt is made to build them. Issue a hint for the user to build asm-offsets.c instead. Suggested-by: Michael Matz <matz@suse.de> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Michal Marek <mmarek@suse.cz> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/1418139917-12722-1-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/asm-offsets_64.c')
-rw-r--r--arch/x86/kernel/asm-offsets_64.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kernel/asm-offsets_64.c b/arch/x86/kernel/asm-offsets_64.c
index e7c798b354fa..4c0c596dfb95 100644
--- a/arch/x86/kernel/asm-offsets_64.c
+++ b/arch/x86/kernel/asm-offsets_64.c
@@ -1,3 +1,7 @@
+#ifndef __LINUX_KBUILD_H
+# error "Please do not build this file directly, build asm-offsets.c instead"
+#endif
+
#include <asm/ia32.h>
#define __SYSCALL_64(nr, sym, compat) [nr] = 1,