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authorPaolo Bonzini <pbonzini@redhat.com>2016-03-31 09:38:51 +0200
committerSasha Levin <sasha.levin@oracle.com>2016-04-20 01:08:50 -0400
commit9b561b878bc40703e21144def6a5c2c8d436b883 (patch)
treee341e63a9e3eb9624a25db720f23f16d554606c9
parentf320793e52aee78f0fbb8bcaf10e6614d2e67bfc (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.h2
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 */