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[PATCH 4.5 019/124] compiler-gcc: disable -ftracer for __noclone functions

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4.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Paolo Bonzini <pbonzini@redhat.com>

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: kvm@vger.kernel.org
Reported-by: Linda Walsh <lkml@tlinx.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 include/linux/compiler-gcc.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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 */
 

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[PATCH 4.5 000/124] 4.5.2-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:40 +0200
  [PATCH 4.5 045/124] mlx4: add missing braces in verify_qp_parameters Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:40 +0200
  [PATCH 4.5 007/124] parisc: Unbreak handling exceptions from kernel modules Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:40 +0200
  [PATCH 4.5 047/124] ath9k: fix buffer overrun for ar9287 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:40 +0200
  [PATCH 4.5 024/124] drm/radeon: add another R7 370 quirk Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:40 +0200
  [PATCH 4.5 043/124] ipv4: Dont do expensive useless work during inetdev destroy. Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:40 +0200
  [PATCH 4.5 041/124] rocker: set FDB cleanup timer according to lowest ageing time Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:40 +0200
  [PATCH 4.5 054/124] ipv4: fix broadcast packets reception Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:40 +0200
  [PATCH 4.5 052/124] net: bcmgenet: fix dma api length mismatch Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:40 +0200
  [PATCH 4.5 035/124] sh_eth: fix NULL pointer dereference in sh_eth_ring_format() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:40 +0200
  [PATCH 4.5 011/124] ALSA: hda - Apply fix for white noise on Asus N550JV, too Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:50 +0200
  [PATCH 4.5 013/124] mm: fix invalid node in alloc_migrate_target() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:50 +0200
  [PATCH 4.5 020/124] arm64: opcodes.h: Add arm big-endian config options before including arm header Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:50 +0200
  [PATCH 4.5 010/124] ALSA: hda - Fix white noise on Asus N750JV headphone Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:50 +0200
  [PATCH 4.5 015/124] s390/mm: handle PTE-mapped tail pages in fast gup Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:50 +0200
  [PATCH 4.5 018/124] powerpc/process: Fix altivec SPR not being saved Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:50 +0200
  [PATCH 4.5 003/124] parisc: Fix SIGSYS signals in compat case Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:50 +0200
  [PATCH 4.5 006/124] parisc: Fix kernel crash with reversed copy_from_user() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:50 +0200
  [PATCH 4.5 019/124] compiler-gcc: disable -ftracer for __noclone functions Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:50 +0200
  [PATCH 4.5 016/124] libnvdimm: fix smart data retrieval Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-18 05:50 +0200
  Re: [PATCH 4.5 000/124] 4.5.2-stable review Guenter Roeck <linux@roeck-us.net> - 2016-04-18 18:40 +0200
    Re: [PATCH 4.5 000/124] 4.5.2-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-19 08:00 +0200
  Re: [PATCH 4.5 000/124] 4.5.2-stable review Shuah Khan <shuahkh@osg.samsung.com> - 2016-04-18 18:40 +0200
    Re: [PATCH 4.5 000/124] 4.5.2-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-19 08:00 +0200
  Re: [PATCH 4.5 000/124] 4.5.2-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-04-19 08:00 +0200

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