The kbuild test robot reported this objtool warning [1]:

  arch/x86/kvm/emulate.o: warning: objtool: fastop()+0x69: call without frame pointer save/setup

The issue seems to be caused by CONFIG_PROFILE_ALL_BRANCHES.  With that
option, for some reason gcc decides not to create a stack frame in
fastop() before doing the inline asm call, which can result in a bad
stack trace.

Force a stack frame to be created if CONFIG_FRAME_POINTER is enabled by
listing the stack pointer as an output operand for the inline asm
statement.

This change has no effect for !CONFIG_PROFILE_ALL_BRANCHES.

[1] https://lists.01.org/pipermail/kbuild-all/2016-March/018249.html

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/.zsh/zshenv/01_path b/.zsh/zshenv/01_path
index 8c299be..c68c3fe 100644
--- a/.zsh/zshenv/01_path
+++ b/.zsh/zshenv/01_path
@@ -41,7 +41,7 @@ path_append /opt/nios2/bin
 path_append /opt/nios2mmu/x86-linux2/bin
 path_prepend /opt/codesourcery/nios2-4.1-211/bin
 #path_append /opt/codesourcery/arm-2010.09/bin
-path_append /opt/cov-analysis-linux64-7.6.0/bin
+path_append /opt/cov-analysis-linux64-7.7.0.4/bin
 path_append /opt/linaro/gcc-linaro-arm-linux-gnueabihf/bin
 path_append /opt/sourceryg++-2014.05/bin