Messages in this thread Patch in this message | | | From | Borislav Petkov <> | Subject | [PATCH] x86, asm-offsets: Guard against building the 32/64-bit versions directly | Date | Tue, 9 Dec 2014 16:45:17 +0100 |
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From: Borislav Petkov <bp@suse.de>
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> Cc: Michal Marek <mmarek@suse.cz> Signed-off-by: Borislav Petkov <bp@suse.de> --- arch/x86/kernel/asm-offsets_32.c | 4 ++++ arch/x86/kernel/asm-offsets_64.c | 4 ++++ 2 files changed, 8 insertions(+)
diff --git a/arch/x86/kernel/asm-offsets_32.c b/arch/x86/kernel/asm-offsets_32.c index d67c4be3e8b1..207c48278dff 100644 --- a/arch/x86/kernel/asm-offsets_32.c +++ b/arch/x86/kernel/asm-offsets_32.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/ucontext.h> #include <linux/lguest.h> diff --git a/arch/x86/kernel/asm-offsets_64.c b/arch/x86/kernel/asm-offsets_64.c index 4f9359f36bb7..7fcb2312b532 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, -- 2.0.0
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