Commit 95272c29 authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

compiler-gcc: disable -ftracer for __noclone functions



-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: default avatarLinda Walsh <lkml@tlinx.org>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 61abdbe0
......@@ -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 */
......
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