diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-03-31 09:38:51 +0200 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-04-20 01:08:50 -0400 |
| commit | 9b561b878bc40703e21144def6a5c2c8d436b883 (patch) | |
| tree | e341e63a9e3eb9624a25db720f23f16d554606c9 | |
| parent | f320793e52aee78f0fbb8bcaf10e6614d2e67bfc (diff) | |
compiler-gcc: disable -ftracer for __noclone functions
[ Upstream commit 95272c29378ee7dc15f43fa2758cb28a5913a06d ]
-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>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
| -rw-r--r-- | include/linux/compiler-gcc.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index 484ef6e65e4c..27fa57322550 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -192,7 +192,7 @@ #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 */ |