Messages in this thread Patch in this message | | | From | Paolo Bonzini <> | Subject | [PATCH] compiler-gcc: disable -ftracer for __noclone functions | Date | Thu, 31 Mar 2016 09:44:12 +0200 |
| |
-ftracer can duplicate asm blocks causing compilation to fail in noclone functions. For example, KVM declares a global variable in an asm like
asm("2: ... \n .pushsection data \n .global vmx_return \n vmx_return: .long 2b");
and -ftracer causes a double declaration.
Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Michal Marek <mmarek@suse.cz> Cc: stable@vger.kernel.org Cc: kvm@vger.kernel.org Reported-by: Linda Walsh <lkml@tlinx.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> --- include/linux/compiler-gcc.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index 22ab246feed3..eeae401a2412 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -199,7 +199,7 @@ #define unreachable() __builtin_unreachable() /* Mark a function definition as prohibited from being cloned. */ -#define __noclone __attribute__((__noclone__)) +#define __noclone __attribute__((__noclone__, __optimize__("no-tracer"))) #endif /* GCC_VERSION >= 40500 */ -- 2.5.5
| |