diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-03-31 09:38:51 +0200 |
|---|---|---|
| committer | Max Krummenacher <max.krummenacher@toradex.com> | 2016-09-29 14:57:26 +0200 |
| commit | dfd109dca43faf395e40ba560b05c73a463ca34b (patch) | |
| tree | 4dc2b7e9c93a738efaf84d4fe15e034112954576 | |
| parent | 8a897c8781706e06526a40e683c41fccdb383abf (diff) | |
compiler-gcc: disable -ftracer for __noclone functions
commit 95272c29378ee7dc15f43fa2758cb28a5913a06d upstream.
-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: Willy Tarreau <w@1wt.eu>
(cherry picked from commit 5d814ad8d35e5e23e0c27fb0f0b80c1044ecefad)
| -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 36402e27b016..abbac368aa1c 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -174,7 +174,7 @@ #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 */ |