Commits
Sean Christopherson committed 2bcbd406715
Revert "compiler-gcc: disable -ftracer for __noclone functions" The -ftracer optimization was disabled in __noclone as a workaround to GCC duplicating a blob of inline assembly that happened to define a global variable. It has been pointed out that no amount of workarounds can guarantee the compiler won't duplicate inline assembly[1], and that disabling the -ftracer optimization has several unintended and nasty side effects[2][3]. Now that the offending KVM code which required the workaround has been properly fixed and no longer uses __noclone, remove the -ftracer optimization tweak from __noclone. [1] https://lore.kernel.org/lkml/ri6y38lo23g.fsf@suse.cz/T/#u [2] https://lore.kernel.org/lkml/20181218140105.ajuiglkpvstt3qxs@treble/T/#u [3] https://patchwork.kernel.org/patch/8707981/#21817015 This reverts commit 95272c29378ee7dc15f43fa2758cb28a5913a06d. Suggested-by: Andi Kleen <ak@linux.intel.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Nadav Amit <namit@vmware.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Martin Jambor <mjambor@suse.cz> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Miroslav Benes <mbenes@suse.cz> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Reviewed-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>